#linuxcnc Logs

Mar 14 2017

#linuxcnc Calendar

12:02 AM Wolf_: 12v 240L/H maybe?
12:04 AM Wolf_: http://a.co/9xgBEAv
12:04 AM {HD}: Wolf_: Cool, I like the look of that. I just want to make sure it pumps enough to keep it cool enough.
12:04 AM {HD}: I don't plan on using a radiator(yet). I have seen plenty of write ups on people just using a 5 gal bucket full.
12:12 AM CaptHindsight: run the numbers on the cooling capacity required
12:12 AM {HD}: Ok...how?
12:13 AM CaptHindsight: whats the ambient air temp of the room it will be in?
12:13 AM CaptHindsight: how much heat is generated by the tube?
12:13 AM {HD}: CaptHindsight: I don't know that amount of heat generated. I havent run the spindle yet.
12:13 AM CaptHindsight: what is the max temp rise allowed for the tube?
12:14 AM CaptHindsight: ah for a spindle
12:14 AM Wolf_: I know I’ll need a chiller because shop ambient will be greater then tube cooling
12:14 AM Wolf_: spindle cooling just need to check the water temp once in a while I would think
12:15 AM Wolf_: but I also have the chiller built for under $60
12:17 AM CaptHindsight: the spindle has to be at least 50% efficient
12:17 AM CaptHindsight: so figure 750W of heat and you should be good
12:18 AM CaptHindsight: or if you're short on funds figure 300W of heat and measure the temp
12:18 AM CaptHindsight: and modify the cooling capacity as required
12:18 AM Wolf_: hmm specs don’t give heat output for the laser tube
12:18 AM CaptHindsight: an aluminum 5 gal pail has lots of surface area
12:19 AM {HD}: how much is 750w of heat?
12:19 AM CaptHindsight: Wolf_: does it show input power vs output power?
12:19 AM CaptHindsight: the difference is heat
12:20 AM Wolf_: no, just the mah max
12:20 AM CaptHindsight: {HD}: thats like asking how much is 2 lbs of coal
12:21 AM {HD}: =/
12:21 AM Wolf_: err max mA even
12:21 AM CaptHindsight: how many volts?
12:21 AM roycroft: what will be the duty cycle of this spindle?
12:22 AM CaptHindsight: since it's chinaco you have to expect the number to be approximate
12:22 AM {HD}: http://www.ebay.com/itm/261935861901?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
12:22 AM roycroft: automation direct, btw, sell water-cooled spindles, and they sell a 200gph pump for them
12:23 AM roycroft: i'm asking what YOUR duty cycle willb e
12:23 AM roycroft: if you cool the spindle sufficiently it should be able to handle a 100% duty cycle
12:24 AM Wolf_: wow nice, reci doesn’t list shit for specs lol
12:24 AM roycroft: but if you're only going to run it 20% of the time you need ess cooling than if you're going to run it 100% of the time
12:24 AM roycroft: less
12:26 AM CaptHindsight: what if you run it at 100% for 5 minutes per hour?
12:27 AM roycroft: that's a 12% duty cycle
12:27 AM Wolf_: lets see, 45KV 28mA for 100W (130W peak) laser tube
12:28 AM Wolf_: 650W input on laser psu
12:28 AM CaptHindsight: 45kv sounds high
12:28 AM CaptHindsight: but you could use that for worst case
12:29 AM Wolf_: that might be ignition V
12:29 AM CaptHindsight: most likely then 24kv running
12:29 AM CaptHindsight: or similar
12:29 AM CaptHindsight: so probably 250W total with 100w being light vs heat
12:30 AM CaptHindsight: er 350w totoal
12:30 AM Wolf_: yeah, they seem to like listing things at peak numbers lol
12:30 AM CaptHindsight: so you have a 250W heater that you need to keep at 30C
12:31 AM Wolf_: yup 20-30c,
12:31 AM CaptHindsight: 30c max
12:32 AM CaptHindsight: so 300w chiller (1,000btu)
12:34 AM evilroot: That's pretty simple
12:34 AM evilroot: Just use a surplus chiller
12:34 AM Wolf_: which I can’t find the rating on my ghetto chiller, converted dehumidifier + pump, radiator and temp pid box
12:34 AM evilroot: o.O
12:34 AM CaptHindsight: if you wanted to cool it with radiators and fans then you need to find some thermal resistance numbers on a radiator
12:35 AM CaptHindsight: Wolf_: how much power does it draw?
12:35 AM Wolf_: ~7A 110v IIRC
12:35 AM CaptHindsight: figure conservatively for 50% efficiency
12:35 AM evilroot: An old Boekel ought to be plenty
12:36 AM evilroot: They're usually under $50
12:36 AM Wolf_: r12 AC unit pretty much
12:36 AM evilroot: Ugh
12:36 AM Wolf_: this was free…
12:36 AM evilroot: At the very least modern coolants are interchangable with r12 and much more efficient
12:37 AM Crom: Long time neighbor passed away today. Korean War Combat Veteran, from the time he got out of the Army till he retired he worked as a deckhand or as a mate on tug boats in the Long Beach Harbor James William Butler
12:37 AM CaptHindsight: Wolf_: for some roiugh comparisons look at the size of cpu water coolers for a 200w cpu
12:37 AM evilroot: If its old enough to be using r12 it's probably only operating at 20% of original
12:37 AM Wolf_: really the only out of pocket is the radiators for a total of $32 from amazon for 2 120mm 8 row
12:37 AM evilroot: And might freeze up
12:37 AM Crom: while in surgery for a damn bed sore!
12:38 AM Wolf_: it does have a freeze guard build in
12:38 AM Crom: I like duracool hell of a lot more efficient than 134a
12:40 AM Crom: even more efficient that r12
12:41 AM Wolf_: yeah, I could, but I don’t feel like adding ports and I don’t have a recovery setup
12:42 AM Crom: they ban cfc's but allow swimming pools which put a shit load more chlorine into the air
12:42 AM Wolf_: yup
12:45 AM Wolf_: anyways my idea was just to have http://a.co/c5GPiH9 controller cycle the compressor, 240L/H pump and 2 120mm 110v fans to hold the water bucket at 20-25C
12:48 AM chopper79: I used the insides of an old water cooler to chill my laser a few years back. You can fidn them cheap and when you rip them apart the actual chiller unit is small.
12:48 AM Wolf_: probably same as the dehumidifier setup
12:48 AM chopper79: might be
12:49 AM Wolf_: I actually have a water cooler sitting next to dumpster by the shop, dehumidifier was next to it
12:50 AM chopper79: Sweet
12:51 AM Wolf_: guess I’ll pull it apart also
12:51 AM Wolf_: guess I could also use the heater out of the water cooler for winter freeze proofing lol
12:52 AM chopper79: Well all I am giving up for the night. I ordered a 10 pack of gear sensors as the 3 that I purchased broke. I need to learn how to be a bit softer with my hands.
12:52 AM chopper79: The leads break off easy and they break off right at the case
01:00 AM CaptHindsight: I see that pc cpu cooling if full of non specs and snake oil
01:00 AM Wolf_: yup
01:01 AM CaptHindsight: they don't have any thermal resistance specs
01:01 AM CaptHindsight: not btu ratings
01:01 AM CaptHindsight: just if you have this use this B.S.
01:02 AM Wolf_: pretty much, thats why I was going to aim for holding the water tank at temp vs trying to do set cooling
01:02 AM CaptHindsight: http://koolance.com/how-to-build-a-water-cooled-pc this is just nonsense
01:02 AM CaptHindsight: like if you want you car to go faster get a bigger engine
01:03 AM CaptHindsight: thank you for the white paper
01:04 AM Wolf_: I like how GPU us 100-450w yet says radiator size by device count
01:05 AM roycroft: hmm, the multifix qctp system is not all that expensive
01:05 AM roycroft: it seems like it would be a lot nicer than the aloris type
01:06 AM CaptHindsight: http://www.wakefield-vette.com/Portals/0/liquid%20cold%20plates%20data%20sheets/Wakefield-Vette%20Exposed%20Tube%20Liquid%20Cold%20Plates%20Final.pdf
01:08 AM CaptHindsight: Wolf_: http://dkc1.digikey.com/us/en/tod/Wakefield/Liquid-Cold-Plate/Liquid-Cold-Plate.html
01:08 AM CaptHindsight: might be of interest ^^^
01:10 AM Wolf_: kinda neat but not needed for my setup, was going to just open loop the laser tube and the chiller in a common reservoir
01:11 AM CaptHindsight: you ca nose around the wakefield site for how to run the numbers on cooling systems
01:11 AM CaptHindsight: ca/can
01:12 AM Wolf_: seeing the 98% of what I have is free, I was just going to test it live lol
01:12 AM CaptHindsight: you'll learn some that way
01:12 AM CaptHindsight: metal bucket or plastic bucket?
01:12 AM Wolf_: plastic
01:13 AM CaptHindsight: you can alwats swap for a metal bucket and then add a fan if it doesn't keep up
01:14 AM CaptHindsight: or add a fountain
01:14 AM Wolf_: I figured that a active chiller should be enough lol
01:15 AM roycroft: you might look at glycol chillers as are used in bars to keep beer kegs cold
01:15 AM roycroft: they're fairly available used
01:15 AM CaptHindsight: he has a system already, low budget
01:15 AM Wolf_: yeah, I have 3 actually lol
01:15 AM CaptHindsight: adjust the size of the bucket
01:16 AM roycroft: when i build my new router table (for wood routing) i'm going to get a water-cooled spindle
01:16 AM CaptHindsight: shallow and wide like a hot water heater pan vs 5 gal home depot hdpe bucket
01:16 AM roycroft: i figure a small pump and a 5 gallon reservoir will probabgly suffice for a 2.2kw motor
01:16 AM roycroft: the 5 gallon reservoir being a plastic bucket
01:17 AM CaptHindsight: the hdpe is a poor thermal conductor
01:17 AM CaptHindsight: so it's more the open surface are of the water
01:17 AM roycroft: make one out of copper :)
01:18 AM Wolf_: other possible I was thinking of was to strip the fins off the dehumidifier coil and tape another copper coil to the evaporation coil and run the water through that
01:18 AM CaptHindsight: I used to design cooling systems for super computers and dense servers
01:20 AM CaptHindsight: more surface area = more thermal transfer
01:20 AM roycroft: a plate chiller is a great heat exchanger
01:20 AM roycroft: when i was brewing with my old system i used a double immersion chiller to cool my wort
01:21 AM roycroft: the first immersion chiller (a coil of copper tubing) sat in a bucket of ice water
01:21 AM roycroft: cold tap water flowed through that to my second chiller, which sat in the beer wort
01:21 AM roycroft: it would take about 20 minutes to chill 19L of wort from boiling to pitching temperature (about 18C)
01:22 AM CaptHindsight: roycroft: so when can we come over for sour tastings? :)
01:22 AM roycroft: when i build my new system i got a plate chiller
01:22 AM roycroft: now i can chill 38L in 10 minutes, and i do not need a pre-chiller
01:22 AM roycroft: capthindsight: you just missed it
01:22 AM roycroft: i had a batch of blackberry wine turn into vinegar
01:22 AM roycroft: and i dumped it
01:22 AM CaptHindsight: next time
01:22 AM roycroft: it was good and sour
01:22 AM CaptHindsight: was it sour bad vs sour good?
01:22 AM roycroft: it was bad sour
01:23 AM roycroft: if it had potential for good sour i'd have nursed it along and given it more time
01:23 AM roycroft: but it was all acetic
01:23 AM CaptHindsight: what happened to it?
01:23 AM roycroft: air got into it
01:23 AM roycroft: if it had been malic or lactic acid it would have mellowed and possibly been really good eventually
01:24 AM CaptHindsight: I've been trying some American attempts at sours l;ately
01:26 AM Wolf_: this thing might be the weak link in my chiller plan http://a.co/bnmk4kq
01:26 AM CaptHindsight: roycroft: what with all the bad IPA's they are making?
01:27 AM CaptHindsight: is really bitter in?
01:28 AM CaptHindsight: Wolf_: ~6 x 5 x 1 with a small fan should do it
01:29 AM CaptHindsight: it's like Starbucks with burned coffee posing as strong coffee
01:30 AM CaptHindsight: Wolf_: auto heater cores are also cheap
01:31 AM Wolf_: somewhat, already sized that one (x2) with the dehumidifier evap coil
01:31 AM Wolf_: auto heater core might make sizing a pain in the ass
01:34 AM Wolf_: but! I think I have a couple heater cores in the attic in the shop, I might have to drag them out lol
01:34 AM Wolf_: -$32 on this build lol
01:34 AM CaptHindsight: already paid for
01:36 AM CaptHindsight: by fedeal law lasers in the USA require a shutter that blocks any emission if any warning pop up
01:36 AM CaptHindsight: so a high power light/heat sink on a solenoid
01:37 AM CaptHindsight: I use water cooled block of aluminum with a mirror mounted on a rotary solenoid
01:38 AM CaptHindsight: so even if the laser enable sticks high the failsafe is that the solenoid is there to block the laser
01:38 AM CaptHindsight: is that/is there
01:38 AM Wolf_: other thing I have seen done is bend the evap coil on the dehumidifier so it sets inside the reservoir
01:39 AM CaptHindsight: I have to rework that sentence
01:39 AM Wolf_: yeah, guess I should look in to the shutter setup
01:39 AM CaptHindsight: FDA retirements for class IV laser
01:40 AM Crom: I guess a K40 is a class iV as well
01:40 AM CaptHindsight: it's all fun and games until someone losses an eye or burns the house down
01:40 AM Wolf_: yup, funny part, K40 and the x700 clones don’t have a shutter setup
01:41 AM GregB1 is now known as GregB
01:41 AM GregB: Hey guys
01:41 AM GregB: Switched systems
01:41 AM CaptHindsight: doesn't comply with the FDA requirements
01:41 AM Crom: yep it would be pretty easy to mount on on the hole coming out of the tube chamber
01:41 AM Wolf_: yeah, between the first and 2nd mirror
01:41 AM GregB: Anyway, has anyone used Universal Laser System with a VM?
01:42 AM CaptHindsight: https://www.fda.gov/downloads/MedicalDevices/DeviceRegulationandGuidance/GuidanceDocuments/UCM095304.pdf
01:42 AM Wolf_: not me
01:42 AM Wolf_: I was thinkign laser web on a linux system talking to a smoothie board
01:43 AM CaptHindsight: GregB: I've seen them on ebay for cheap by I use RF types by Coherent and similar
01:43 AM GregB: Seen what on ebay?
01:43 AM GregB: a VM? Virtual Machine
01:43 AM Crom: the computer that can run laser web has the really flakey wifi card :(
01:44 AM CaptHindsight: http://www.ebay.com/itm/UNIVERSAL-LASER-SYSTEMS-UL-25-CO2-Lasers-25W-/322161817512 ans similar
01:45 AM CaptHindsight: http://www.ebay.com/itm/UNIVERSAL-LASER-SYSTEMS-UL-25-CO2-Lasers-25W-with-power-supply-control-board-/171268872343
01:46 AM Wolf_: oh seeing you know laser systems, for the view window on the C02 box (on the lid) regular lexan works right? or should I be looking at something else
01:48 AM CaptHindsight: Wolf_: for your power level it has to be an OD of at least 4 if I recall
01:49 AM CaptHindsight: 100w co2?
01:49 AM CaptHindsight: maybe OD of 5
01:49 AM CaptHindsight: http://www.lasersafetyindustries.com/Laser_Safety_Windows_s/1.htm
01:50 AM CaptHindsight: http://www.lasersafety.com/windows/laser-safety-windows
01:50 AM CaptHindsight: https://www.lia.org/evaluator/od.php
01:51 AM CaptHindsight: Minimum OD Required: 4.02 10600um @ 100W
01:53 AM CaptHindsight: http://www.pro-lite.co.uk/File/laser_safety_eyewear_calculations.php
01:54 AM CaptHindsight: and just FYI https://www.osha.gov/dts/osta/otm/otm_iii/otm_iii_6.html#6
01:55 AM Crom: 800w laser http://www.laserresale.com/?fa=app.view&it=5404 $2560 $250000 when new in 1985
01:56 AM Crom: chiller for an extra $2000
01:56 AM CaptHindsight: I'd buy the laser
01:56 AM CaptHindsight: and if you don't know how to cool I'd buy the chiller with it
01:57 AM CaptHindsight: thats a real bargain
01:57 AM CaptHindsight: even if you had to refill the tube it's well worth it
01:58 AM Wolf_: looks little big for my garage
01:58 AM Wolf_: hell, 100w co2 is probably overkill for my home shop lol
02:00 AM Crom: wrong side of the country for me... even I have space and power for it
02:00 AM Crom: 3/8 steel 1/4" stainless... you could make money with that!
02:01 AM Wolf_: so, is that super special acrylic really needed for window, seeing that co2 wavelength won’t penetrate acrylic at all?
02:01 AM CaptHindsight: it says hardly broken in for age/use
02:01 AM CaptHindsight: so I wonder what the catch is
02:01 AM GregB: The catch is
02:02 AM CaptHindsight: 32 year old caps
02:02 AM GregB: it's probably fucked up by the people who are selling them
02:02 AM CaptHindsight: oxidized pcb connections/solder
02:02 AM Wolf_: size of a small bus
02:02 AM GregB: Been is storage for a yr, b4 someone tore it apart to sell it for parts?
02:03 AM CaptHindsight: looks pretty dirty for just sitting there
02:03 AM GregB: Probably due to whoever took it apart.
02:04 AM GregB: I alway cringe when I read "Sold as is"
02:04 AM CaptHindsight: "touched by small children daily after lunch"
02:04 AM GregB: Hey, anyone know hows the systems are preventing the machine from starting unless connected to a computer?
02:04 AM CaptHindsight: yeah, opps we dropped it or similar
02:05 AM GregB: I'm a little surprised they took the time to disconnect all the wires and didn't just cut them
02:05 AM CaptHindsight: bubbas laser removal and dismantling service
02:05 AM CaptHindsight: we also catch critters
02:06 AM GregB: The first one you showed looks REALLY good
02:07 AM GregB: Anyone else sort of turned off the idea of buying anything on ebay?
02:07 AM Wolf_: somethings yes
02:07 AM GregB: I've tried it 2 times, and both times, absolutely horrible experience.
02:09 AM GregB: I'm seriously pissed that ULS can't even try to come up with a Linux Version to their software
02:10 AM Wolf_: I got 5 BLDC servo amps, a BLDC servo motor, renishaw probe, and bunch of other small stuff off ebay
02:11 AM Wolf_: what is needed for control GregB ?
02:11 AM GregB: Wolf_, I'm not sure what you're asking.
02:12 AM Wolf_: actually, what are you trying to control, a full box ?
02:12 AM GregB: I know next to nothing... scratch that... nothing about these machines.
02:12 AM GregB: I'm trying to learn a bit more.
02:12 AM CaptHindsight: I buy on ebay all the time
02:12 AM Wolf_: one of these things? http://www.laserresale.com/?fa=app.view&it=6786
02:12 AM GregB: But the goal is to have one computer control multiple machines.
02:12 AM CaptHindsight: you have to check the seller and read the details
02:13 AM GregB: yes
02:13 AM CaptHindsight: have only been disappointed once
02:13 AM CaptHindsight: but i bought 100's of times
02:13 AM CaptHindsight: even from China
02:14 AM Wolf_: I had a close call with a starrett 98-12 level that got stolen when left for USPS pickup
02:14 AM Wolf_: but the seller actually had a 2nd one that he sent me
02:14 AM Wolf_: just took 3 weeks vs 4 days
02:14 AM GregB: I purchased a server and few Battery Backup Units.
02:15 AM GregB: the servers came, missing cables, one had a missing CPU.
02:15 AM CaptHindsight: the one time was just that they had pics of 2 of something but the ad said only one
02:15 AM GregB: the Backups were just the cases.
02:15 AM Wolf_: ok, with that laser unit, what are you planning on doing with it, cutting or raster engraving?
02:15 AM GregB: I was so pissed
02:15 AM CaptHindsight: I didn't read carefully and got only one when I though I got 2
02:16 AM CaptHindsight: and one time I knew they were used but the ad said New
02:16 AM GregB: Wolf_, I am currently embossing wristbands and cutting paper with it.
02:16 AM GregB: the paper was not my idea, nor was it setup by me.
02:16 AM CaptHindsight: so i got a discount on some big parker ballscrew positioners with servo motors
02:17 AM Wolf_: well, you can pretty much do the same thing that the k40 guys do, swap out the controller for a smoothie or linux cnc
02:18 AM GregB: yeah, machines are too expensive for me, as an amateur to just swap out the parts.
02:18 AM GregB: I do have 2 other machines from epilog that I might be able to do that with.
02:18 AM GregB: But those machines are currently on the frits.
02:18 AM Wolf_: I’m actually working on a full scratch build
02:19 AM Wolf_: cause the full machines cost to damn much
02:19 AM GregB: What do you mean full scratch build?
02:19 AM GregB: Like making an entire machine?
02:19 AM Wolf_: yup, everything but the laser power supply and the tube
02:20 AM GregB: http://www.engraversnetwork.com/products/universal-laser-systems/vls4-60/
02:20 AM Wolf_: everything else is loose parts orders
02:20 AM GregB: You anywhere near houston?
02:20 AM Wolf_: and crap I have laying around
02:20 AM Wolf_: nope, DC area
02:20 AM GregB: ahh, I used to live out there.
02:21 AM GregB: btw, that link is the machine I got
02:21 AM GregB: I got 2 of these
02:22 AM Wolf_: yeah, I’m looking at a part area of 1500mm x 760mm
02:23 AM Wolf_: part of the reason I won’t buy a pre-build box, they seem to like to jump the price by size
02:24 AM GregB: What would be cool
02:24 AM GregB: is if there was a box that was cheaper, but could be made much larger
02:25 AM GregB: so you could buy it, and adapt it to fit a larger plate
02:25 AM GregB: What I really want is a laser engraver room.
02:25 AM Wolf_: lol
02:26 AM GregB: Where instead of it being a shit ton of machines, I got one big as room that people go in, setup, and then the jobs start going
02:26 AM Wolf_: yeah, except still need the laser paths enclosed
02:27 AM GregB: Ohh, everyone can just run
02:28 AM Wolf_: lol
02:28 AM GregB: though, I know what you're referring to, just the thought of a few people running for cover was funny.
02:29 AM Wolf_: yeah, warning countdown, lasers firing in 30 seconds…
02:30 AM GregB: Big Red light swirling on the outside.
02:30 AM GregB: Doors closing like it's a vault.
02:30 AM Wolf_: lol
02:31 AM Wolf_: yup, need the movie computer voice doing countdown
02:31 AM GregB: Incase of nuclear attack, it could be used as a bunker.
02:31 AM GregB: lol
02:32 AM Wolf_: zombie bunker hallway IMO
02:33 AM GregB: Well, we could always lead the zombies in there
02:33 AM GregB: and turn on the lazers.
02:34 AM Wolf_: thats the idea
02:34 AM GregB: Entertaining while life saving.
02:34 AM GregB: ohh, I didn't get it then
02:35 AM GregB: Alright, I need sleep for the AM
02:35 AM GregB: if ANYONE knows how to get these machines running on VM's
02:35 AM GregB: PLEASE let me know. You can e-mail me: gregborbonus@gmail.com
02:36 AM Wolf_: should work, I have run some stuff on VM on one of my linux machines
02:36 AM GregB: My lasers won't even turn on
02:36 AM Wolf_: if its usb interface you might need to tell the VM what usb to pass through
02:36 AM GregB: I did that.
02:37 AM Wolf_: is it connecting?
02:37 AM GregB: Used VirtualBox with 2 Windows 7 VM's
02:37 AM GregB: yes, Windows even tries to install the drivers for it.
02:37 AM GregB: and I've even made sure USB 2.0 is supported.
02:37 AM Wolf_: tries? that doesn’t sound good
02:37 AM GregB: So, these are weird.
02:38 AM GregB: the usb interface is supposed to create what I would call a loop back USB device.
02:38 AM GregB: for the initial setup
02:38 AM GregB: then you can add it as a printer, and select the driver for the printer(thus leaving the USB as is).
02:38 AM Wolf_: only issue, I haven’t tried usb in VM, used serial to rs485
02:39 AM GregB: ULS is USB only
02:40 AM IchGucksLive: Good morning from Germany
02:40 AM IchGucksLive: and USA keep Shuffeling
02:40 AM Wolf_: that sounds like a pain in the ass
02:41 AM IchGucksLive: Wolf_: wat material are you expexting
02:41 AM GregB: it most certainly is.
02:41 AM IchGucksLive: on the 1500x760
02:41 AM Wolf_: for my laser build? 13mm ply max
02:41 AM Wolf_: 6mm typical probably
02:42 AM IchGucksLive: cool so you do a moving head construction
02:42 AM IchGucksLive: or a simple Laserbeam Tranfer
02:42 AM IchGucksLive: focus in the burn Head
02:42 AM Wolf_: simple 3 mirror w/ focus lens
02:42 AM Wolf_: and one combiner for red laser
02:43 AM IchGucksLive: that is best for positinig
02:43 AM IchGucksLive: GregB: Why VM in first hand
02:43 AM Wolf_: yeah, set the red laser up once and then mirrors are easy
02:43 AM GregB: I need to get one machine
02:43 AM IchGucksLive: get you a 10USD PC and go for a full
02:43 AM GregB: or a hub
02:44 AM GregB: that runs multiple machines
02:44 AM IchGucksLive: not a good idee
02:44 AM GregB: too many Computers in an area.
02:44 AM IchGucksLive: as you can run only one mashine at the time
02:44 AM GregB: why not?
02:44 AM GregB: What?
02:44 AM IchGucksLive: no way for simuntaniasly
02:45 AM Wolf_: sucks but, probably single board computers are the best bet, but you could network them to feed the work files
02:45 AM IchGucksLive: you vcan bring Multiple G-codes to lots of Controllers
02:45 AM Wolf_: or remote control
02:45 AM IchGucksLive: Wolf_: got the point
02:45 AM Wolf_: do headless
02:46 AM GregB: I'm trying to send multiple jobs to multiple machines
02:46 AM GregB: from one machine
02:46 AM IchGucksLive: and you lose track on more then 3
02:46 AM IchGucksLive: We got around 50 3D printers in University controlled ba 2 Networks
02:46 AM GregB: how/why woud you lose track?
02:47 AM IchGucksLive: it is a nightmare to get to setup
02:47 AM GregB: yeah, you've lost me
02:48 AM Wolf_: I’m doing mini itx systems for my cnc stuff
02:48 AM IchGucksLive: i stay on the HP and Fujitsu as 20USD for the System
02:49 AM IchGucksLive: and all one case set with Drivers BOB and PSU
02:49 AM Wolf_: yeah, there is that option as well, simple used systems
02:49 AM IchGucksLive: ThinClients is fast and low latency
02:50 AM IchGucksLive: But the noice level is high on allInone as cooling takes a effect
02:50 AM IchGucksLive: in 8hr Shift full motion
02:51 AM IchGucksLive: the University Room hosts 120 3D printrs
02:51 AM IchGucksLive: and you cand cool it below 50C
02:52 AM IchGucksLive: it is also a optical nightmare
02:52 AM Wolf_: that sounds horrible lol
02:52 AM IchGucksLive: people with classes and problems with coordination cand even go in
02:53 AM IchGucksLive: as all mashines in 4 levels 2 Rows move in different direction
02:54 AM IchGucksLive: ive heard not seen to th architekts Examin they printed a Truck load of filament in one week
02:55 AM IchGucksLive: Wolf_: do you go servo on the laser
02:55 AM Wolf_: no, going stepper
02:56 AM IchGucksLive: with the Cheep SBR i retched 0,02mm at 1500 by 500mm Tbar load
02:57 AM IchGucksLive: so 2000mm mashine wide
02:57 AM IchGucksLive: Length
02:57 AM IchGucksLive: the 1/3 rule is correct on this
02:58 AM Wolf_: SBR?
02:58 AM IchGucksLive: Suported Bar rails
02:58 AM Wolf_: ahh cool
02:59 AM IchGucksLive: http://www.cnc-discount.de/
02:59 AM Wolf_: I have sr15 THK rails :)
02:59 AM IchGucksLive: max over load dimansing and pricy
02:59 AM IchGucksLive: ok you got china supply
03:00 AM Wolf_: I was thinking about using hiwin MGN12 also
03:00 AM IchGucksLive: http://www.cnc-discount.de/epages/62924595.sf/de_DE/?ObjectPath=/Shops/62924595/Products/%22O15%20%202000%22
03:00 AM Wolf_: the THK are surplus stuff I picked up years ago
03:00 AM IchGucksLive: 240 USD
03:01 AM Wolf_: wow thats cheap
03:01 AM IchGucksLive: and the SBR is 150
03:01 AM IchGucksLive: http://www.cnc-discount.de/epages/62924595.sf/de_DE/?ObjectPath=/Shops/62924595/Products/G162000
03:01 AM Wolf_: one 1520mm MGN12 is $240+
03:02 AM IchGucksLive: if you want to go X1500 With 800 in Y you neet to go for 1800 Rails
03:03 AM IchGucksLive: PAD load is critical so i woudt use the 2000mm
03:03 AM Wolf_: I don’t need true 1500mm cut area
03:03 AM IchGucksLive: so 1000 woudt be good ?
03:04 AM IchGucksLive: The With is the Triggi
03:04 AM Wolf_: 1250mm min
03:04 AM IchGucksLive: on Strangth and Stabel as well as precicion
03:04 AM Wolf_: 4 foot is standard wood sheet width
03:04 AM IchGucksLive: on THAT it reduces costs to 100USD
03:04 AM IchGucksLive: as 1400 SBR is in 1400mm lenth
03:05 AM IchGucksLive: http://www.cnc-discount.de/epages/62924595.sf/de_DE/?ObjectPath=/Shops/62924595/Products/G121400
03:05 AM Wolf_: right now I have 1520mm planned because I have 4x THK sr15 @ 760mm
03:06 AM IchGucksLive: up to you
03:06 AM Wolf_: I picked up off ebay like 10-12 yrs ago for $100
03:06 AM IchGucksLive: it gets you a real tiny cool fast mashine
03:06 AM IchGucksLive: with 0.01Acuracy on TR16x4
03:07 AM IchGucksLive: 400 steps = Half stepping Control
03:07 AM IchGucksLive: and 4mm Pitch
03:07 AM IchGucksLive: with lkatency below 20k
03:07 AM IchGucksLive: you reatch 25000 Steps per second
03:07 AM Wolf_: I was thinking 5mm pitch belt, w/ 2:1 on stepper w/ 1/32 step
03:08 AM Wolf_: 1.8°
03:08 AM IchGucksLive: thats rouphly 250mm/sec
03:08 AM IchGucksLive: with no loss
03:08 AM IchGucksLive: 10inches per Sec is way fast
03:09 AM IchGucksLive: the modern TR nuts got almost no Backlash
03:09 AM Wolf_: I was actually shooting for 300mm/s lol
03:09 AM IchGucksLive: i did a serie of 25 mashines
03:09 AM Crom: sheeshz... 8' in 4 seconds
03:10 AM Crom: ok maybe 5or 5.5 seconds but that's still fast
03:10 AM IchGucksLive: with all mashines out of the box 75 Nuts only one got a 0.02mm backlash
03:10 AM Wolf_: wow that is pretty good
03:11 AM IchGucksLive: Wolf_: you do not need 0,01mm
03:11 AM IchGucksLive: as your "TOOL is 0,1mm Widt
03:11 AM IchGucksLive: so you need at min 0.05mm
03:12 AM IchGucksLive: with a cheep Timingbelt setz 10USD per Axis
03:12 AM Wolf_: yup
03:12 AM IchGucksLive: you are at the mesurments you want at 700mm/sec if you can bring the ardware to that speed
03:12 AM IchGucksLive: AND best the timingbelt is flexibal to get other precisions
03:13 AM IchGucksLive: if you need
03:13 AM IchGucksLive: nothing to change on the Hardware then pulley and beld
03:13 AM Crom: hmm 1400-1280 150mm for gantry bearing spacing... is that enough?
03:13 AM Wolf_: that I was looking at as well, steel core belt
03:14 AM IchGucksLive: i did a Quick Calculatioon on Min need so i came at 550 USD for the System
03:14 AM Crom: Wolf how high is Z gonna be?
03:14 AM IchGucksLive: Crom: depends on load
03:14 AM Crom: and what are you cutting?
03:15 AM IchGucksLive: on todorial path you can reduce by 70%
03:15 AM Wolf_: Z is going to be high as it needs to be for the head short focal plane, but planning on power bed on final setup
03:15 AM Crom: oh laser?
03:15 AM Wolf_: yeah
03:15 AM IchGucksLive: my cheesy 0,1mm Backlash can do AL full load on a 10mm bit 20 Depth
03:16 AM Crom: 150 is fine then
03:16 AM IchGucksLive: 1/3 is best rule on this
03:16 AM Wolf_: I just need to make up my mind on using what I have or buying new parts
03:16 AM IchGucksLive: on Mill of cause
03:17 AM Crom: you can always raise the rails higher so X,Y, and Z are flatter, and have table move for Z
03:17 AM IchGucksLive: im off to the Classroom
03:18 AM IchGucksLive: By
03:18 AM Crom: steel cored belts should be fine too... if you can keep gantry and z carriage weight down
03:18 AM Wolf_: yeah, X/Y design is constrained by the mirror path
03:18 AM Crom: you play with a K40 yet/
03:18 AM Wolf_: nope
03:19 AM Wolf_: looked at the K40, x700 clone, decided to DIY
03:20 AM Wolf_: going to make a 2.5w engraver to play with the software and control board, while i wait for the co2 parts to arrive
03:20 AM Crom: I'll have to get out to the garage and take some pictures of them and email them to you. Y is driven by 2 belts, right side is a roller on top of the frame. left side has round linear rail
03:21 AM Wolf_: yeah, I know its pretty simple in there
03:21 AM Wolf_: if I wanted I could just use open build v slot extrusion
03:22 AM Crom: X is basically 2 pieces of AL with plastic roller on shafts guiding it.. one belt. Z is just a 45 mirror and focus mirror.
03:22 AM Crom: foxus lens
03:22 AM Wolf_: I have a air assist head on order already
03:23 AM Crom: I had a buddy 3d print a bunch for me... you tend to end up melting them and less you build a nice AL one
03:23 AM Wolf_: w/ mirrors, focus lens, combiner lens
03:24 AM Wolf_: https://www.aliexpress.com/item/co2-laser-machine-laser-head-laser-engraving-and-cutting-machine-head/32607604200.html
03:24 AM Crom: slide focus one? I've seen people put servo's on those for focus length
03:25 AM Crom: nicer one.. you could drive that focus knob with a stepper
03:25 AM Wolf_: actually the knob is just a clamp lock
03:26 AM Deejay: moin
03:27 AM Crom: oh well... having a turnable focus knob or nut would be great! Sort of like a drill press depth adjustment screw and nut
03:27 AM Wolf_: powered Z lets you do that
03:28 AM Wolf_: seeing focal plane is from the lens to the work
03:28 AM Crom: Morning Deejay .... guess it's time for me to go to bed....
03:28 AM Deejay: hehe
03:28 AM Wolf_: heh, I was thinking the same thing
03:28 AM Deejay: 9am!
03:28 AM Wolf_: Deejay is here, that means I’m up past my bed time
03:29 AM Wolf_: by 3-4hrs
03:29 AM Deejay: lol
03:29 AM Deejay: what time is at your location?
03:29 AM Deejay: midnight?
03:29 AM Wolf_: 4am EST
03:29 AM Deejay: uh
03:29 AM Crom: sometimes you want to aim a bit deeper or shallower... on acrylic I like aiming a bit deeper and on raster a bit higher 01:00
03:29 AM Wolf_: stupid daylight saving time
03:29 AM Crom: gmt -8
03:30 AM Crom: or 7 depending on the time of year...
03:30 AM Crom: was that last week end?
03:30 AM Deejay: we dont have daylight saving time yet
03:30 AM Crom: yeasterday?
03:30 AM Wolf_: weather is calling for a few feet of snow here today so not like I much to do
03:30 AM Wolf_: yesterday
03:31 AM Deejay: yeah, here its last weekend in march
03:31 AM Crom: ugh... meansI need to check my alarm clock
03:31 AM Crom: nite nite all... oh hey! We found Jesus!
03:32 AM Deejay: good nite, crom
03:36 AM Deejay: good nite, Wolf ;)
03:38 AM Wolf_: yeah I probably should
05:04 AM jthornton: morning
05:04 AM XXCoder: hey the jt
05:05 AM jthornton: what's up this morning
05:06 AM XXCoder: it was not nice workday :P
05:06 AM jthornton: ouch
05:06 AM XXCoder: dizzy and I had to run 3 machines so I keep waking back and forth
05:08 AM jthornton: I spend half of my day yesterday down at the industrial part programming PLC's
05:10 AM XXCoder: yeah?
05:10 AM jthornton: industrial park even
05:12 AM jthornton: yea working on adding cameras to the gas tank screen stakers
05:12 AM jthornton: I think I have all the undocumented features removed now :)
05:13 AM XXCoder: lol
05:13 AM XXCoder: but not "send money to JT bank" undocumented feature right? ;)
05:14 AM jthornton: oh no, I get money for this
05:16 AM XXCoder: I know, I was kidding about adding software to send money :P
05:16 AM jthornton: their accounting dept is a real mess, I prob could do that lol
05:17 AM XXCoder: lol, though its nice way to earn some jail time
05:19 AM XXCoder: im still unsure what to do
05:19 AM XXCoder: I cant be machinist forever
05:19 AM XXCoder: my back sucks
05:27 AM jthornton: what's up with your back?
05:28 AM XXCoder: oh its just wearing twice as fast as average
05:28 AM XXCoder: I have had arthitis since I was 27
05:28 AM jthornton: yuck
05:29 AM XXCoder: meh
05:29 AM XXCoder: just one of many issues
05:29 AM XXCoder: I have so many that new problem means nothing basically
05:32 AM SpeedEvil: XXCoder: exoskeleton
05:33 AM XXCoder: that'd be cool lol hjigh tech one
05:33 AM SpeedEvil: This is one of the reasons I want to have a nice machine shop.
05:34 AM SpeedEvil: You can easily buy high-torque suitable servos, they're just $10K each
05:34 AM XXCoder: lol cheap
05:34 AM SpeedEvil: And when you need 30 of them, that adds up.
05:35 AM XXCoder: yeah
05:35 AM XXCoder: heh I still remember my old "R" handsign mostic made with lego project
05:35 AM XXCoder: it uses tons of 1x1 plates
05:35 AM XXCoder: so much that small one cost me almost 50 bucks
06:06 AM XXCoder: SpeedEvil: oh and one part cost 3 cents
06:06 AM XXCoder: hundreds of parts lol
06:06 AM SpeedEvil: :)
06:08 AM XXCoder: actually most expensive color was 3 cents
06:08 AM XXCoder: most common was white at penny each
07:12 AM enleth: is it normal and reasonable to use a keyway and a key on a pulley that's shrink fitted to a shaft?
07:13 AM enleth: I'm trying to get a belt pulley off of the end of a ballscrew (ORAC's Z axis), there's a rectangular key and two set screws on it
07:14 AM sync_: if the designer anticipated it slipping, maybe
07:14 AM enleth: long story short, I removed the set screws and tried to use a bearing puller - no go, won't budge, damaged the puller (and marred the edge of the pulley, but it will be OK)
07:14 AM gregcnc: i don't recall exactly now, but I think my Emco was that tight
07:15 AM enleth: so I built a bigger puller out of some 6mm thick 60mm side angle iron and strap clamps
07:16 AM enleth: result?
07:16 AM enleth: the angle iron started twisting
07:16 AM archivist: effin tight :)
07:16 AM gregcnc: flamethrower
07:17 AM enleth: jusging by how much twist they had when I noticed, it was under a couple tons of tension
07:17 AM archivist: or industrial puller
07:17 AM enleth: *judging
07:17 AM archivist: pfft 40- 100t
07:17 AM enleth: and that's a puny 10mm shaft
07:19 AM archivist: a rusted tight fit can often be started with a shock
07:19 AM enleth: no rust at all
07:19 AM sync_: you might not see it
07:20 AM archivist: my ex army pullers have a 40ton hydraulic ram
07:20 AM enleth: and I *did* give it a couple dozen lively whacks with a sizeable hammer, while it was under tension
07:20 AM enleth: no go
07:22 AM enleth: for a moment I considered buying a chinese hydraulic press-style bearing puller, then I realized they're basically sheet metal
07:22 AM enleth: if my angle iron twisted, a chinese press would most likely just fold up on itself
07:25 AM enleth: if I had a replacement pulley, I'd just cut the original one apart and sand the inside of the new one a little to make it a looser fit, but I just wanted to get the screw guards off for cleaning
07:25 AM archivist: these are solid http://www.sykes-pickavant.com/products/pullers-and-separators/hydraulic-pullers-and-kits/853
07:26 AM archivist: they make various sizes
07:28 AM XXCoder: playing with estlcam
07:28 AM XXCoder: fun
07:30 AM enleth: looks like I have to machine a ball retaining sleeve and get the nuts off the screw to remove the guards through the other end
07:34 AM archivist: or make something to clean in situ
08:36 AM MrSunshine: damn .. looks like my design of the X/Z axis is far to prone to twisting for the machine to run well :/
08:38 AM archivist: add webbing or a rectangular tube to stop twist
08:39 AM MrSunshine: archivist: got two parallel square tubes that has two braces evenly spaced on them .. and adding stuff to the current design .. i dont know .. maybe better to redo it :/
08:41 AM enleth: so it started moving, then I ran out of reach on the puller's center as the pulley is quite thick
08:41 AM enleth: so I put a steel nut in there as a spacer, as I always d
08:41 AM enleth: do
08:41 AM MrSunshine: archivist: https://scontent-arn2-1.xx.fbcdn.net/v/t31.0-8/r270/17191687_10155123201438648_5420178695565384123_o.jpg?oh=8338107cefe6518cc606bcda7c3d9f3c&oe=59253091
08:42 AM enleth: soon the puller started to feel kind of mushy to turn
08:42 AM MrSunshine: the center has to have the ballscrew so hard to add webbing there also ..
08:42 AM enleth: lo and behold, I literally blended the nut into a steel paste between the puller's center and the end of the shaft
08:42 AM MrSunshine: and the high rail descision might not have been so good either .. but gotta roll with what i got atm :/
08:44 AM archivist: the tubes could be larger, just add a sheet to stiffen the tube in the worst direction under load
08:45 AM archivist: depends what you are machining with it
08:46 AM MrSunshine: archivist: its 80x80 with 5mm thickness of material thing is that it jumps alot on fast stops etc .. seems to fare quite good otherwise .. or ill just run with the punches .. to get the machine up and running then rebuild a new gantry laster =)
08:46 AM MrSunshine: everything is a learning experience :P
08:46 AM archivist: sure is
08:46 AM MrSunshine: learned alot since my first machine atleast =) but still making huge mistakes =)
08:48 AM archivist: 200 square will be much more rigid
08:53 AM MrSunshine: gonna add a gusset in front of the standing leg atleast .. should add some stability as it would have to twist the while linear rail alot more to be able to twist the bastard =)
08:53 AM MrSunshine: archivist: and its wood im going to machine with it so .. but still do not want it twisting and shattering like crazy =)
08:56 AM archivist: probably perfectly ok for wood, the RPM of the cutter moves the wood
08:58 AM MrSunshine: archivist: yes but atm its like jerking forward and stuff .. so gotta investigate that also .. like something is binding up a bit .. but the final assembly is not here yet and alot of work to be done still ... so .. just noticed this when i was moving it with the ballscrew and battery powered drill ..
09:00 AM archivist: turn by hand to feel it
09:12 AM MrSunshine: archivist: yeah its something strange with that screw .. it turns fine like 90% of a turn then it gets real sticky .. and its not realy straight :/ damn chinese ballscrews
09:14 AM archivist: may have to shim/move the nut and end bearing supports to get more inline
09:41 AM JesusAlos1 is now known as JesusAlos
09:52 AM enleth: well, mystery solved
09:53 AM enleth: there was a chippied piece of a set screw in an indentation that the set screw was supposed to engage
09:53 AM enleth: that piece dug into the pulley and wedged itself against the shaft
09:54 AM enleth: there's a small gouge in the pulley's bore now, but that shouldn't really affect anything
10:07 AM archivist: I think one time the set screw had been loose built up a huge bur on the shaft either side of the dimple, that was hard to remove
10:36 AM anonimasu: does anyone have a idea what resistor i need for a single ended encoder input to a mesa 7i47
10:39 AM archivist: look at the encoder specs, is it ttl or open collector or ...
11:04 AM anonimasu: archivist: it's ttl level encoders
11:04 AM anonimasu: archivist: what i want to do is count them with the mesa differential input
11:04 AM anonimasu: s
11:05 AM skunkworks_: You can switch them to TTL inputs...
11:05 AM skunkworks_: afaik - all mesa hardware is switchable
11:08 AM anonimasu: no pins for that in my bitfile on the 7i47
11:16 AM archivist: I have seen pcw mention how simple it is for for ttl in, but finding it in the logs will be almost impossible
11:26 AM pcw_home: Unfortunately the 7I47 is differential input only
11:29 AM pcw_home: but you can do this:
11:29 AM pcw_home: disable termination and tie the - inputs of the input pairs to a ~ 1.65V reference
11:29 AM pcw_home: ( say a voltage divider with a 240 ohm resistor to 5V and 120 ohm to ground )
11:29 AM pcw_home: then tie the TTL signals to the + inputs
11:35 AM roycroft: if i go looking at a used lathe, what's the easiest way in the field to determine if the ways are excessively worn?
11:35 AM roycroft: just observing the flaking?
11:36 AM cradek: take a test indicator and magnetic mount with you
11:36 AM cradek: check the slop at the ends of travel and in the middle
11:36 AM roycroft: just have it ride the saddle?
11:37 AM cradek: sure that'd work
11:37 AM roycroft: so wiggle the saddle to check?
11:37 AM cradek: grab the saddle and pull and twist it
11:38 AM cradek: of course you can't tell if it moves in a straight line this way, but you probably could see bad bed wear
11:39 AM roycroft: to see if it's straight, i'd probably want to turn a long piece between centers
11:39 AM roycroft: and often the machines are not under power
11:39 AM roycroft: so that can be tough
11:39 AM cradek: yeah
11:40 AM cradek: you could take a test bar to mount on centers
11:40 AM cradek: but depending on the machine that could fool you, if the lathe is just mounted badly
11:41 AM roycroft: yes, the tailstock could be offset, although that should be easy to determine
11:41 AM roycroft: or it could just be unlevel
11:41 AM cradek: or twisted
11:41 AM roycroft: yes
11:42 AM roycroft: buying a used lathe involves some risk
11:42 AM roycroft: although buying a new asian import can also involve risk
11:43 AM roycroft: if the castings are aged for an hour and 45 minutes before they're machined and ground they could be a completely different shape by the time they cross the ocean
11:43 AM roycroft: if they were ever straight in the first place
11:44 AM cradek: [controversial statement:] for a lot of everyday work it doesn't matter one bit
11:45 AM roycroft: i don't consider that controversial
11:45 AM roycroft: it's actually something that can be difficult to teach to new machinists
11:45 AM roycroft: you can get overly fiddly with your parts
11:46 AM roycroft: and make them far more accurately than they need to be
11:46 AM roycroft: at the cost of a lot of time
11:46 AM roycroft: there's a reason tolerences are specified on blueprints
11:46 AM cradek: heh I've turned a critical foot-long taper approximately never times in my life
11:46 AM cradek: but I've turned a bunch of short sloppy 1/4-20 threads that were just fine
11:47 AM roycroft: i need to make some arbors for a sheldon horizontal lathe
11:47 AM Darren: Can anyone point me to a article for beginners? I have search the web and the forum and haven't really found anything that would be good for someone wanting to get started without much knowledge. I know linux and computing, is there a cheap parallel driver for beginners or?
11:47 AM roycroft: it has a b&s #9 taper
11:47 AM roycroft: that's going to be a fairly long taper that needs to be very accurate
11:48 AM cradek: Darren: do you mean getting started with linuxcnc? or machining? or ?
11:48 AM SpeedEvil: Darren: What're you hoping to do at the end of it
11:49 AM Darren: basically i would like to get 3 unmounted servos and move them with a computer
11:49 AM Darren: and go from there
11:49 AM Darren: i say move, i meant control them
11:49 AM roycroft: so you need a remedial cnc course :)
11:50 AM roycroft: there is a lot to learn
11:50 AM Darren: i'm a hands on learner, only so much i can learn from reading
11:55 AM roycroft: there's a guy who makes youtube videos, whom i find somehwat annoying at times, and completely wrong on some things (he insists on tinning stranded wires, for example, which would get him fired from just about anywhere)
11:55 AM roycroft: he did a set of videos on two cnc conversions - a small grizzly lathe and a precision matthews mill-drill
11:55 AM jdh: I like to tin stranded wires sometimes
11:56 AM roycroft: i think most folks would, as it's easier to work with them when they're tinned
11:56 AM roycroft: but it also weakens them
11:56 AM roycroft: anyway, that's not the point
11:56 AM jdh: only if they flex
11:56 AM roycroft: the guy is cnc4xr7
11:57 AM roycroft: you might peruse his videos and focus on the ones dealing with the electronics
11:57 AM roycroft: that would give you an idea how to build a cnc device
11:58 AM Darren: is his channel LinuxCNC or something else?
11:58 AM Darren: ah, ok
11:58 AM roycroft: he uses mach3, i think
11:58 AM roycroft: but you can get help with linuxcnc here, if that's what you're going to use
11:58 AM roycroft: the electronics will be similar regardless of what control software you use
11:59 AM roycroft: if you don't want to read a book, i'm suggesting some videos that might get you started
11:59 AM roycroft: you'd at least learn enough to be able to ask intelligent questions
11:59 AM jdh: parallel port and servo would be atypical imo, unless you had a step/dir servo drive
12:00 PM Darren: sounds good
12:00 PM roycroft: if you're going to use linuxcnc folks like the mesa interface cards
12:00 PM roycroft: in lieu of parallel ports
12:00 PM roycroft: and we happen to have a rep from mesa on this channel, as well as a mesa reseller
12:02 PM roycroft: neither of whom will hype their products, but both will answer questions when they're around
12:02 PM Darren: so starting out it would be worth learning the components such as driver boards and servos?
12:03 PM roycroft: that's one way of sorting things out
12:03 PM roycroft: a perfectly legitimate one
12:04 PM roycroft: what kind of machine are you building/converting?
12:04 PM Darren: i would be happy to start with something that moves x and y
12:05 PM roycroft: moving what? a matchbook? a granite monolith?
12:05 PM roycroft: and how accurately do you need to move it?
12:05 PM Darren: future i would like something to engrave wood with
12:05 PM roycroft: ok, so a wood router
12:05 PM Darren: probably a dremel tool or something of the sort
12:05 PM Darren: or an actual router yes
12:06 PM roycroft: jumping into a big mess of religiosity here, a stepper-based setup might work find for that and might be easier for a beginner to successfully deploy, vs. servos
12:07 PM roycroft: but learning the differences between steppers and servos, and the advantages and disadvantages of each, would be a really good idea
12:07 PM roycroft: then you can figure out what will work best for you
12:08 PM archivist: roycroft, if V bed there will be little rock but it wears downwards, so tool does not stay on centerline
12:09 PM archivist: my southbend is 10-14 thou below sea level :)
12:09 PM Darren: i think my research on 3d printer may be the fact i keep thinking servos
12:09 PM roycroft: that could be tough to determine in the field
12:10 PM roycroft: i'm considering a machine that's 5 hours away
12:10 PM Darren: so the difference between servos and steppers are speed and torque?
12:10 PM roycroft: an old logan
12:10 PM archivist: roycroft, a level placed on the saddle, then traverse, it should remain the same all the way, will show slopes if worn
12:11 PM cradek: ooh that's clever
12:11 PM cradek: two levels at right angles would be even better
12:11 PM archivist: but it is in the books on lathe testing
12:11 PM roycroft: https://mendocino.craigslist.org/tls/6001492493.html
12:11 PM roycroft: aah, i can bring a machinist's level with me
12:12 PM archivist: measure the angles and you can then produce a profile from the tangents
12:12 PM cradek: you're not going to try to cnc that thing, are you?
12:12 PM archivist: so it is V bed
12:12 PM roycroft: no, i would not cnc it
12:13 PM cradek: oh thank goodness
12:13 PM roycroft: i'm concerned about the mediocre quality of the pictures
12:13 PM archivist: too nice as manual
12:13 PM roycroft: and the stated "needs a little tlc" bit
12:13 PM cradek: I predict it'll be worn but still work acceptably
12:13 PM cradek: back gear will have a tooth broken off
12:14 PM archivist: mine is well worn, still can produce good fits
12:14 PM roycroft: indeed, it would be a travesty to cnc a machine like that
12:14 PM roycroft: immediately i need to turn the floating ends of some ball screws
12:15 PM archivist: if that is original paint then it had had an easy life
12:15 PM roycroft: and longer term i need to turn some 6" diameter ss, and i don't need to hold high tolererance for that
12:15 PM roycroft: tolerance
12:15 PM roycroft: if it's a little sloppy it should be fine for those things
12:15 PM roycroft: i also need to do some double threads that don't need to be really tight
12:15 PM roycroft: again, it should be fine for that if it's a little sloppy
12:16 PM cradek: the thru hole is pretty darn small
12:16 PM cradek: better not be much of a ballscrew
12:16 PM roycroft: longer term it could be rebuilt and tightened up if necessary
12:16 PM roycroft: i think they'll be 20mm
12:16 PM Darren: Thank you all for the help and direction.
12:16 PM roycroft: but yes, i'd want to be sure what i can stuff through the spindle before i would get it
12:17 PM roycroft: most logans i've seen are 3 phase
12:17 PM roycroft: odd that this one is not
12:18 PM archivist: mine is flat belt, slips under load, a v belt conversion/vfd would make things better
12:18 PM roycroft: i don't mind putting a vfd on an older lathe
12:18 PM roycroft: i don't think that detracts from the aesthetic value of it
12:18 PM roycroft: especially since it's trivially reversable
12:19 PM archivist: new pulleys for V belts and save the old
12:20 PM roycroft: it's hard for me to tell from those pictures, but i'm guessing about a 10" swing?
12:20 PM archivist: I can see southbend and logan were a similar style
12:20 PM roycroft: yes, similar style and similar market
12:21 PM roycroft: they both came out originally for the home shop/small commercial shop market
12:21 PM archivist: the model number may tell you exactly what it is
12:22 PM archivist: http://www.lathe.com/models.htm
12:22 PM roycroft: 10x24
12:22 PM roycroft: spindle bore 25/32
12:22 PM roycroft: that might be a deal breaker
12:23 PM archivist: lists like that are what make the web so useful
12:23 PM roycroft: yes
12:24 PM archivist: and google for finding it so easily
12:24 PM roycroft: although a gopher server would do just as nicely for that :)
12:25 PM roycroft: that listing has been up for a month, so the price may be negotiable
12:25 PM roycroft: or maybe it's not, which is why the listing has been up for a month
12:25 PM cradek: that seems like a lot of money
12:25 PM roycroft: lathes are very expensive around here
12:25 PM roycroft: i live far away from the rust belt
12:26 PM roycroft: there's a le blond that looks somewhat interesting as well
12:26 PM roycroft: it's in corning
12:27 PM roycroft: just about as far away, but i have to drive over siskiyou summit to get to corning
12:27 PM roycroft: https://chico.craigslist.org/tls/6031402249.html
12:29 PM roycroft: siskiyou summit is rather steep and high - 1310m
12:29 PM roycroft: the highest point on i5
12:29 PM roycroft: and it's a bit early in the year to expect decent weather there
12:33 PM archivist: http://www.lathes.co.uk/regal/page3.html
12:40 PM roycroft: if the price were right that could be a good machine, but $1700 seems a bit steep
12:40 PM roycroft: and i see no mention of a 4-jaw
12:40 PM roycroft: so that adds even more cost
12:41 PM archivist: I was in the local machine mart this morning, looked at the chinesuim lathes, I would go for old iron :)
12:57 PM roycroft: for a manual lathe, i'll definitely do that if possible
12:58 PM roycroft: for a cnc lathe, i am looking for something smaller, and an import might do fine
12:58 PM roycroft: it would be enclosed in a box, so i would not be looking at the ugly design lines much :)
01:00 PM roycroft: but the bottom line is that i don't know of many old iron lathes that are suitable for cnc conversion that are small enough for my needs
01:00 PM roycroft: a cnc mill is far more important to me right now than a cnc lathe anyway
01:01 PM roycroft: although if this project with the 6" diameter ss rollers works out, a decent size cnc lathe would be useful
01:01 PM roycroft: i would need to rent shop space for that though, so i'd need to be pretty sure that my product is marketable
01:12 PM jdh: small lathes seem harder to convert with ballscrews
01:21 PM IchGucksLive: hi
01:23 PM IchGucksLive: roycroft: did make a Book of spam
01:24 PM IchGucksLive: how is the snow effecting somone in the East US
01:24 PM malcom2073: Funly!
01:24 PM IchGucksLive: pinklady must bee in the middle of the mess
01:30 PM IchGucksLive: Question how is this Circulation miling path realy called
01:31 PM IchGucksLive: torenchenal
01:31 PM IchGucksLive: todorial
01:31 PM IchGucksLive: cand find a good answer
01:31 PM archivist: your word is so wrong we cannot translate
01:32 PM IchGucksLive: where the tool cirles an path around the contur
01:32 PM archivist: there is "contour milling"
01:33 PM IchGucksLive: let me upload a picture of the toolpath itself
01:33 PM archivist: in english we dont join up words the same
01:34 PM skunkworks_: trochoidal
01:35 PM IchGucksLive: http://pasteall.org/pic/index.php?id=113555
01:37 PM IchGucksLive: thanks
01:37 PM archivist: http://www.widia.com/en/featured/trochoidal-milling.html
01:58 PM IchGucksLive: here is a Tutorial on how to make trochoidal Toolpath https://youtu.be/8euJ5Tx6ncA
01:58 PM IchGucksLive: in English
01:59 PM IchGucksLive: on ubuntu and Estlcam
02:25 PM IchGucksLive: Wolf_: still on ? on pump i use in watercooling them inside the bucket https://www.conrad.de/de/Search.html?searchType=REGULAR&search=pumpe
02:28 PM Wolf_: yeah, flow demands are low on the laser tube so cheap 12v 240L/h will work for me
02:36 PM IchGucksLive: as you say low hope this will reatch your need
02:37 PM IchGucksLive: i woudt go more flow amount on that laser tube
02:37 PM IchGucksLive: and make a flow meter
02:39 PM IchGucksLive: Wolf_: http://www.ebay.com/itm/KING-INSTRUMENT-Durchflussregler-Luft-20-235-l-min-/160986704797
02:39 PM IchGucksLive: with a induktiv NPN you can go save on noice no flow
02:40 PM Wolf_: http://www.ebay.com/itm/262779109173 + arduino nano and i2c lcd
02:41 PM Crom: oh happy pi day!
02:43 PM IchGucksLive: Wolf_: does it count rotor speed
02:43 PM IchGucksLive: so interrupt count
02:43 PM Wolf_: seeing that its a halls sensor with a impeller, I would guess so
02:44 PM IchGucksLive: i woudt go manuell for flow and colored water
02:44 PM IchGucksLive: ok im off Gn8
02:45 PM * Wolf_ can’t do things simple way lol
03:00 PM Deejay: wb wolf ;)
03:22 PM greg__: Hey guys
03:22 PM greg__ is now known as GregB_Work
03:23 PM gregcnc: hi greg i'm greg
03:23 PM GregB_Work: Nice to meet you Greg.\
03:24 PM GregB_Work: Wolf_ I'd really love to see what you're building. Would like to compare it to buying a fully assembled unit and maintaining it.
03:26 PM Wolf_: actually you can go here http://www.openbuilds.com/?category=laser-cutter-builds&id=304
03:26 PM Wolf_: Mine isn’t the most original design, But I am thinking about some odd things to add in to it lol
03:32 PM Wolf_: one of those just made me go “why didn’t I think of that”…
03:32 PM Wolf_: hanging gantry
03:47 PM GregB_Work: How long does it take you to build one of those?
03:49 PM Wolf_: well, I’m on low budget mode so going to be a few months
03:49 PM Wolf_: cheap slow shipping from china doesn’t help any either
03:51 PM GregB_Work: ok, lets say you didn't have a problem with budget, what would the time take?
03:52 PM Wolf_: not counting shipping time, with all parts on hand probably a week, but I’m planning on doing a welded 4 piece frame so the machine can be broken down to move
03:53 PM GregB_Work: see, my boss loves the machines he's got, the support from universal is good.
03:53 PM Wolf_: other issue is I can’t model the thing until I have half the parts here...
03:55 PM GregB_Work: But I love this sort of stuff.
03:55 PM GregB_Work: so definitely going to work on it virtuall, until I'm ready to really tackle it
03:57 PM Wolf_: I have a few things that are going to add complexity to my build as well, like I want the beam combiner and first mirror to be one unit
03:58 PM Wolf_: actual water flow meter w/ readout
03:59 PM Wolf_: pass through for 4’x8’ sheet material
04:32 PM andypugh: I need a 200V 200W servo amp that takes Hall signals. And I need it to be cheap. Any leads?
04:38 PM Wolf_: true 200V?
04:39 PM Wolf_: AMC 25A20 are only 190v 2.5kW rated
04:42 PM andypugh: I need a little one, really.
04:42 PM Wolf_: they make lower amp ones
04:42 PM andypugh: Ideally 240V input
04:43 PM Wolf_: but these are BLDC, but you did say hall signals
04:45 PM Wolf_: you talking 240v AC in? DC motor out?
04:45 PM andypugh: BLDC
04:45 PM Wolf_: AMC with last part of the pn A20ACN I think
04:46 PM Wolf_: 20 is “200v” which is 40-190v DC
04:46 PM Wolf_: ACN is w/ psu
04:46 PM Wolf_: I don’t know if they have a 240v in tho
04:52 PM andypugh: Just got one of these http://www.ebay.co.uk/itm/1pc-used-HD-motor-FHA-25B-3015-E150C-SP-/142223984581 for a rotary axis for the mill
04:53 PM andypugh: Strangely, _exactly_ like that one, with the same sensor flags.
04:53 PM andypugh: But I paid $250
04:53 PM andypugh: And mine has the connectors and cables intact.
04:54 PM Wolf_: nice
04:55 PM andypugh: They are ideal for a rotary axis, they have bearings and can take large radial, axial and moment loads. (like, 400kg)
04:56 PM Wolf_: yeah, I was looking at a harmonic drive but everyone was saying it was too big
04:56 PM malcom2073: Wolf_: My dad has a harmonic drive you can buy when you come to get the extrusion :-P
04:57 PM Wolf_: lol how much…
04:58 PM Wolf_: http://www.ebay.com/itm/292030313807
04:59 PM malcom2073: Unsure, he picks his up for between $50-$200 on ebay, depending on the usefulness and ease of turning into a 4th axis heh
04:59 PM malcom2073: What are you doing?
05:00 PM Wolf_: sorta want a 4th axis
05:01 PM malcom2073: I think he's selling one of his that he already converted too, but it's kinda small, nema23 on it
05:01 PM malcom2073: And a 4" chuck
05:02 PM malcom2073: Trying to find pictures
05:02 PM Wolf_: hmm, that might work perfect on the x2 lol
05:04 PM Crom: andypugh, Nice!! hollow shaft I presume?
05:04 PM malcom2073: andypugh: I have a couple of those, harmonic drives with servo built in, they're kinda cool
05:04 PM malcom2073: I've yet to find a good use, I'm thinking maybe a delta robot, use three of them at the top
05:05 PM Wolf_: I’m still tempted to get that giant one and just stick a big ass stepper on it and use it for a welding rotator
05:05 PM malcom2073: Wolf_: http://carpenterswoodworking.com/?page_id=368
05:05 PM malcom2073: One better, found the build log haha
05:05 PM Wolf_: lol
05:05 PM andypugh: They aren’t super fast. Mine tops out at 40rpm, but then my current rotary tops out at 20 rpm, and that’s fine.
05:06 PM malcom2073: I think mine is about the same speed, maybe slightly slower... but high torque
05:07 PM malcom2073: If it's anything like mine, they have cross roller bearings, and *really* strong
05:07 PM malcom2073: (don't take it apart)
05:07 PM malcom2073: ruined one that way haha
05:07 PM andypugh: I have a HDUF-20-160-2-BL3-SP apare now.
05:07 PM andypugh: Yes, cross-rollers.
05:08 PM malcom2073: Nice, post up pictures once you do it, I wanna see how it turns out :)
05:11 PM andypugh: I posted pics of the previous one I made: http://www.cnczone.com/forums/uncategorised-metalworking-machines/172314-cnc.html
05:15 PM Deejay: gn8
05:33 PM sync_: I think I can push my rotary to 90rpm if I want
05:33 PM skunkworks: well - one ebay amc drive looks to be flakey (Still - we have had darn good luck)
05:34 PM skunkworks: Doesn't turn on for a good minute or more some times. It has an integrated power supply that does power up. So something in the actual drive.
05:43 PM kyle___: hello
05:43 PM kyle___: I would like to share my finest harbor freight purchase so far
05:43 PM kyle___: http://puu.sh/uGwKc/b20d393f81.png
05:43 PM kyle___: $170 for a 20 inch swing drill press
05:44 PM Wolf_: I have one of those, has like a inch of runout in the spindle
05:44 PM kyle___: lol, yeah, my hopes aren't very high for it
05:45 PM kyle___: but damn, it's worth it just for the motor
05:45 PM Wolf_: not really, but it should make holes
05:45 PM kyle___: the runout actually isn't too bad on mine
05:46 PM kyle___: only time will tell if that remains true
05:46 PM Wolf_: yeah, its really not a inch lol, but it is loose as hell
05:47 PM kyle___: this old tony made a new quill for his shitty little 8 inch press
05:47 PM kyle___: maybe that'd solve it
05:47 PM kyle___: that was actually pretty amusing, he found that they had press-fit some bearings into the ends of a hollow aluminum tube and it mushroomed the hell out of it
05:48 PM kyle___: https://www.youtube.com/watch?v=9fyzZ7NGap8
05:48 PM kyle___: it'd be a great excuse for me to buy a lathe!
05:49 PM kyle___: might be a dumb question, but I can run this thing off a VFD can't I?
05:51 PM kyle___: it's just a single phase 110v AC motor
05:51 PM kyle___: has two capacitors
05:51 PM roycroft: you need a 3 phase motor if you want to control your motor with a vfd
05:52 PM roycroft: you should be able to get a small 3 phase motor really cheap though
05:52 PM Wolf_: craigslist is great for 3ph motors
05:52 PM kyle___: yeah you're probably right
05:53 PM kyle___: there are VFDs that can run off 110v/1ph and output 240v/3ph right?
05:53 PM Wolf_: yes
05:53 PM roycroft: yes
05:53 PM kyle___: cool
05:53 PM roycroft: up to about 1.5kw
05:54 PM roycroft: 2.2kw and up usually require 240vac input
05:54 PM roycroft: be careful if you get one of those though
05:54 PM Wolf_: single phase 220 in is easier
05:54 PM roycroft: some require 3 phase input and some split phase
05:54 PM kyle___: yeah, I've been debating whether or not to install 240v in my garage
05:54 PM roycroft: it doesn't really matter for a small motor
05:54 PM kyle___: I probably should just so I can use my arc welder... but eh
05:55 PM roycroft: you can use smaller gauge wire for a 240vac input device vs. a 120vac device
05:55 PM kyle___: yep
05:55 PM roycroft: but other than that it really doesn't matter
05:55 PM Wolf_: IIRC you can feed most 240v 3ph VFD w/ 220 single and just half the rating on it or something
05:55 PM kyle___: hm, a 1500W motor would only draw 12.5 amps on 120vac
05:55 PM kyle___: that's not too bad
05:56 PM roycroft: 1.5kw is 2hp
05:57 PM kyle___: dunno if I shared it here but I finally got all of my stepper motors and drivers together
05:57 PM kyle___: three NEMA 23 size steppers, one is about twice as long and will be my Z axis
05:58 PM Wolf_: 425oz/in ?
05:58 PM kyle___: around there, probably
05:58 PM kyle___: I'm thinking of building a little test rig to see how much I'm actually getting before it loses steps
05:59 PM kyle___: then I might be able to test holding and dynamic torque
05:59 PM kyle___: so I can size my spindle/cutters correctly
05:59 PM Wolf_: what are you cnc ing
05:59 PM kyle___: hopefully aluminum, nothing more though
05:59 PM Wolf_: sounds like router build?
06:00 PM kyle___: was aiming for an X-Y table style with a relatively small spindle
06:00 PM kyle___: routers are too loud :P
06:01 PM roycroft: get a water-cooled spindle
06:01 PM Wolf_: my POS X1 mill http://i.imgur.com/0ZSHCTT.jpg
06:01 PM roycroft: they are very quiet
06:01 PM Wolf_: with too much stepper
06:01 PM kyle___: that is a shitload of stepper for that
06:01 PM SpeedEvil: CNC shapers could be quiet
06:01 PM kyle___: i was aiming for something X-2 sized or so
06:02 PM roycroft: i haven't figured out how i'm going to mount my y axis motor yet
06:02 PM kyle___: hey Wolf_, what is the Z axis made of on that? steel or cast iron?
06:02 PM Wolf_: I should take a pic of my big servo motors next to a 23
06:02 PM roycroft: but i would prefer that it not stick out the front of the mill like wolf_'s (and most others i see)
06:02 PM Wolf_: that whole thing except the quill is cast crap
06:03 PM kyle___: same, roycroft, I'm working on getting an epoxy granite pour together and I'm planning on hiding my Y axis stepper under the Z axis column
06:03 PM kyle___: cast crap or cast iron? :P
06:03 PM Wolf_: both…
06:03 PM kyle___: haha
06:03 PM roycroft: i'm thinking of tucking it under the table
06:03 PM roycroft: and using a belt drive
06:03 PM kyle___: i've been reading that cast iron is far better for machine tools since it absorbs vibration in its crystal structure
06:03 PM roycroft: but i've not worked out the details yet
06:04 PM kyle___: (gray casting iron anyway)
06:04 PM Wolf_: roycroft: http://i.imgur.com/Df3BhTF.jpg
06:04 PM kyle___: yeah, saw some german guys make an epoxy granite cnc mill and they used belt driven axes
06:04 PM roycroft: belt drive would have the added advantage of making it easy to multiply torque if needed, at the expense of speed
06:05 PM Wolf_: http://i.imgur.com/cbTjU5A.jpg rear mounted Y motor :)
06:05 PM kyle___: what do you guys think of using cast iron ways vs hiwin rail?
06:06 PM roycroft: i think i should probably just plant a money tree this summer, harvest in the fall, build a bigger shop with the money, and get a bridgeport class mill to cnc
06:06 PM roycroft: and stop messing with little machines
06:06 PM kyle___: yeah I probably should too, but meh
06:07 PM kyle___: where's the fun in that
06:07 PM Wolf_: thats what my bigger servos are for ;)
06:08 PM Wolf_: I want to get a bridgeport style mill and convert it
06:08 PM malcom2073: Wolf_: Get a bridgeport that is already cnc, and retrofit with linuxcnc
06:09 PM malcom2073: then you don't have to worry about retrofitting ballscrews
06:09 PM Wolf_: or that
06:10 PM Wolf_: I need to find out whats up w/ my VW refund, so I can call that guy up and see if he still has that wells-index + K&T #2 + cutter grinder I was going to buy back in november
06:11 PM Wolf_: maybe I should have listed my bobcat for sale yesterday lol
06:11 PM malcom2073: Trade it to me for some aluminum and rails :-P
06:11 PM Wolf_: probably could have dumped it for $8k
06:11 PM malcom2073: Heh
06:12 PM malcom2073: Probably could've
06:12 PM malcom2073: storm wasn't as bad as people thought it would be though
06:12 PM Wolf_: yeah
06:14 PM malcom2073: We got maybe 12" up here. Really wet though, was hell to snowblow
06:14 PM roycroft: there are cnc bridgeports with acme screws
06:14 PM roycroft: so getting one that's already cnc'ed is no guarantee that it has ball screws
06:14 PM malcom2073: roycroft: Doesn't make it right :-P
06:14 PM roycroft: i'm not arguing right or wrong
06:14 PM malcom2073: Ah I see what you're saying
06:14 PM roycroft: just arguing is
06:14 PM malcom2073: yeah gotta make sure
06:15 PM * roycroft wanders off to work on some parts
06:15 PM malcom2073: Wonder if the ones with acme screws had anti-backlash, would be adequate if so
06:16 PM kyle___: what, two preloading nuts?
06:16 PM malcom2073: Yeah
06:52 PM roycroft: i have several jacobs chucks that do no not tighten up well - after the jaws start tightening, turning the chuck key further just makes the sleeve spin around and not exert any more force on the jaws
06:52 PM roycroft: would a disassembly/cleaning likely take care of that, or is it a sign that a rebuild kit is needed?
06:52 PM roycroft: rebuild kits cost about as much as a new chuck these days
06:53 PM Tom_L: what's your time worth?
06:53 PM roycroft: the experience of doing the disassembly/reassembly
06:54 PM Tom_L: take it apart then and decide
06:54 PM roycroft: but not necessarily that plus buying a new chuck :)
06:54 PM Cromaglious_: I might do 1...
06:54 PM JT-Shop: good night
06:54 PM roycroft: yes, i would start with 1
06:54 PM roycroft: of course
06:54 PM Cromaglious_: and replace the rest... unless they are a really oldy goldy
06:55 PM * Tom_L thinks JT-Shop forgot to set his clock
06:55 PM roycroft: they are all old and rebuildable
06:55 PM roycroft: and better than brand new jacobs chucks
06:55 PM JT-Shop: possibly
06:55 PM roycroft: and way better than the stuff that ships with those imported machines
06:55 PM Cromaglious_: I have some jacobs 6a from like 1934... NOT replacing that!
06:55 PM * JT-Shop forgets so much it
06:55 PM JT-Shop: 's hard to remember what I forgot
06:55 PM Cromaglious_: s/some/one/
06:55 PM roycroft: i have an 11n, a 14n, and a 16n
06:56 PM Wolf_: lol love Facebook groups, someone asking about their K40 not working, first reply “Get a multimeter, or by the sound of your tech level, a guy with a multimeter.”
06:56 PM Cromaglious_: I also have a 33 from early '60 or late 50'
06:56 PM roycroft: maybe 2 14ns
06:56 PM Tom_L: i write things down and forget where the list is
06:56 PM Cromaglious_: Wolf_, ROFLMAO!!!!!
06:56 PM JT-Shop: that works for me too
06:57 PM roycroft: i'll open up a 14n and see what's up with it
06:57 PM {HD}: Is there a way to determine the phase a windings and the phase b windings on an 8 lead stepper motor?
06:57 PM roycroft: they're all fairly old, but not beat up
06:57 PM * JT-Shop heads inside to start the jambalaya
06:58 PM roycroft: the larger taper mount chucks tend to be in better shape than the smaller screw mount ones
06:58 PM Wolf_: HD, multimeter
06:58 PM Tom_L: {HD}, ohm them out
06:58 PM roycroft: because the former were used by machinists
06:58 PM roycroft: and the latter by weekend warriors
06:58 PM {HD}: I know the pairs of wires per winding. But with 4 windings without centertaps how do i ohm them out?
06:59 PM Tom_L: https://www.google.com/search?q=8+wire+stepper+color+code&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjRo9Sek9fSAhWENiYKHZg7CSoQsAQIIg&biw=1104&bih=711
06:59 PM Tom_L: see if one of those matches it
07:00 PM {HD}: Tom_L: I like that idea...easy.
07:00 PM Cromaglious_: {HD}, get and LED with a resistor. put it across a winding. turn the stepper... make note of wires and direction turned.
07:01 PM Cromaglious_: you can deduce phasing
07:06 PM kyle___: hah, I need to get my k40 running again
07:06 PM Cromaglious_: I have 2... 1 good tube, 1 dead tube
07:06 PM kyle___: how long did the dead tube last?
07:07 PM kyle___: and do you know what failed on it?
07:07 PM kyle___: my guess with mine is going to be a cracked cooling tube, but eh, who knows
07:08 PM Cromaglious_: my fault... ran it at 22ma for 10 minutes straight Plated the inside tube.... the tube was conductive end to end... so it couldn't get to lazing
07:08 PM Wolf_: doh
07:08 PM Cromaglious_: I had it running for 6 months before that
07:08 PM kyle___: damn, lol
07:09 PM Cromaglious_: the ballast resistor died at the 2 month mark... 150w 60K resistor fixed that
07:09 PM kyle___: amazing how little current it takes
07:09 PM Cromaglious_: right now both of them are stacked on my table saw... so I can't use them or my saw :(
07:10 PM Cromaglious_: I need to throw some crap out so I have room for one setup
07:10 PM Wolf_: only lack of planning I have, where the hell am I going to put my build when its done
07:11 PM Cromaglious_: wolf: winch it to the ceiling!
07:11 PM kyle___: my garage is slowly filling
07:11 PM kyle___: not much space in there already with a project car
07:11 PM Wolf_: really need to hit the lotto so I can have a new shop build in my back yard
07:12 PM Wolf_: something small, like 60’x80’
07:13 PM Cromaglious_: my garage is full 3 racks, sewing area, lathe, tablesaw, 2x8 storages shelves, 2.5x7 double level bench. cart with tool box, welder, extra grinders, HP LJ 8500, HP LS 4500, trunk, more shelves, toilet, camping gear
07:14 PM Cromaglious_: need to empty my garage and only put back what I can use
07:15 PM Cromaglious_: with the next 3 months
07:15 PM kyle___: my backyard isn't even 60'x80', must be nice to not live in a cramped city :P
07:16 PM Cromaglious_: My backyard shop I want to build will be 8'x10' that's all the room I have for it
07:16 PM Wolf_: my one bay has a forklift, scaffolding and a pile of boxes, middle bay has a full laser alignment rack in pieces, washer/drier to fix up and sell, 3 tool boxs, motor to the forklift and 8’x2’ shelving, last bay has all my welding gear, desk, 2 shelfs and a bunch of crap in it right now
07:16 PM Cromaglious_: I can have an awning stick out another 20'
07:17 PM Wolf_: my current shop is 35’x24’
07:17 PM Wolf_: damn truck won’t even fit in it either
07:17 PM kyle___: do you use your shop for profit or is it just a tinker space?
07:17 PM Wolf_: I’m taking time off
07:17 PM Wolf_: partly cause I can’t get in the fucking thing lol
07:18 PM Cromaglious_: truck goes under a awning...
07:19 PM Wolf_: thinking about adding a 2 car garage to my house just so I can use one of the bays for the mill and cnc stuff
07:19 PM Wolf_: http://i.imgur.com/gzw7p90.jpg
07:19 PM Wolf_: adding a covered work bay out front of the 35x24 has crossed my mind
07:20 PM kyle___: heh, I've seen this picture
07:20 PM kyle___: that is really damn big truck
07:20 PM kyle___: oops I accidentally a word
07:20 PM Wolf_: not really http://i.imgur.com/tvkbXBc.jpg
07:20 PM Cromaglious_: Nice! tilt bed?
07:20 PM kyle___: bigger than I've got, you know
07:21 PM Wolf_: we also work on tai-axle dumps also
07:21 PM Wolf_: Cromaglious_: hook lift truck
07:21 PM kyle___: my situation is a lot better since I bought a little SUV, though
07:21 PM Wolf_: http://i.imgur.com/DgReOwR.jpg
07:21 PM kyle___: much easier to haul things in than a hatchback sports car
07:21 PM Wolf_: lot of stuff we work on won’t fit in the shops
07:21 PM Cromaglious_: for like dumpsters?
07:23 PM Wolf_: http://i.imgur.com/n05yPB7.jpg for anything I want :) http://i.imgur.com/exFS5Vv.jpg
07:23 PM Cromaglious_: Nice Building! bit much of a truck for me at the moment.. I'd probably need a ladder
07:24 PM Cromaglious_: nice!
07:24 PM Wolf_: also works as a crane in a pinch http://i.imgur.com/2sUyYXt.jpg lol
07:25 PM Cromaglious_: lifting its cousin looks like
07:25 PM Wolf_: yeah, 16’ AL100 hook
07:25 PM Wolf_: mine is a 12’ AL90 13,000lb
07:26 PM Cromaglious_: don't see too many out here... more likely to be a winched box onto rails
07:27 PM Wolf_: we sell those as well
07:27 PM Wolf_: Switch’n go
07:27 PM Wolf_: if you use them more then 3-4 times a week you burn the electric winch out
07:27 PM Cromaglious_: hydralic
07:28 PM Wolf_: that adds about 3k to the price
07:30 PM Wolf_: we have done both, I bet you are thinking about the big true roll off trucks, 20’ 40yr dumpsters
07:30 PM Cromaglious_: yeah pete's kw's macks, ford 850's
07:31 PM Wolf_: they actually use a hydro cylinder and pulleys to winch with
07:31 PM sync_: http://www.sirch.com/typo3temp/pics/ffffde197a.jpg
07:31 PM Wolf_: I love the hook system, don’t have to get out of the truck :P
07:32 PM Cromaglious_: that would be nice
07:32 PM Wolf_: yeah, hook systems are super popular in the EU
07:33 PM sync_: well, people are starting to realize that they suck if you want to unload shit in swampy grass
07:33 PM sync_: well, unloading is still ok
07:33 PM sync_: getting the container back up is a pain
07:33 PM Wolf_: everything sucks is swampy grass
07:34 PM Wolf_: yeah, you need to back the truck under or let the hook pull the truck under
07:34 PM sync_: http://cdn2.spiegel.de/images/image-69295-galleryV9-hpvx-69295.jpg that thing works pretty well in swampy grass
07:34 PM Wolf_: I’m use to doing that so we don’t rip up the yard
07:35 PM Wolf_: I want a MAN 8x8 w/ a hook :)
07:35 PM sync_: 8x8 is pretty big
07:35 PM Wolf_: yeah it is lol
07:35 PM sync_: the 6x6 is ok
07:36 PM Cromaglious_: there's a unimog in Phoenix I think I wouldn't mind having... loader and back hoe
07:36 PM sync_: and triple difflocks
07:36 PM Wolf_: http://i.imgur.com/yERX7l3.jpg http://i.imgur.com/mPeN8aB.jpg works for me :)
07:36 PM sync_: http://i.wheelsage.org/pictures/tatra/t815/autowp.ru_tatra_t815_4x4_rally_truck_14.jpg that would be my favorite truck
07:37 PM Wolf_: nice
07:37 PM sync_: although tatra iirc switched to CAT for their dakar powerplant
07:37 PM Cromaglious_: Are those the wide 15" tires on the 853?
07:37 PM Wolf_: yeah
07:37 PM Cromaglious_: I had those on a 953 lovem!
07:38 PM Cromaglious_: 3 where still goodyears 4th was the current chinesium on
07:38 PM Cromaglious_: 3 where still goodyears 4th was the current chinesium one
07:38 PM Wolf_: http://i.imgur.com/KnHOjuJ.jpg http://i.imgur.com/4IBUGhF.jpg we like cat stuff
07:39 PM Cromaglious_: heh my hand grips where bent same way
07:39 PM sync_: https://upload.wikimedia.org/wikipedia/commons/d/dd/%D0%A2%D1%8F%D0%B3%D0%B0%D1%87_%D0%9C%D0%97%D0%9A%D0%A2-79221_%28%D0%BA%D0%BE%D0%BC%D0%BF%D0%BB%D0%B5%D0%BA%D1%81_%D0%A2%D0%BE%D0%BF%D0%BE%D0%BB%D1%8C-%D0%9C%29.jpg
07:39 PM sync_: that thing would also be nie
07:39 PM sync_: but it is wide as fuk
07:39 PM Cromaglious_: I welded 10K rings on the sides for tying down
07:39 PM Wolf_: yeah, that bobcat is beat to hell
07:39 PM Wolf_: lol sync_
07:40 PM sync_: 8 driven and streering axles :D
07:41 PM Cromaglious_: change the missile into a fuel tank then your ready!
07:41 PM Wolf_: I rase your 16 axle thing with this http://i.imgur.com/0Nh3Tzd.jpg
07:41 PM sync_: the cone makes a satisfying noise when it is jettisoned
07:41 PM Wolf_: bubble wrapped tank...
07:41 PM sync_: https://upload.wikimedia.org/wikipedia/commons/b/bc/Belarus-Volot_Transporting_T-72-1.jpg
07:42 PM sync_: well, they also make tank trailers
07:42 PM Cromaglious_: https://bloomington.craigslist.org/hvo/5946351755.html
07:43 PM Cromaglious_: mmmm Solyent Green crowd control truck
07:43 PM Wolf_: holy over priced
07:43 PM sync_: http://www.mzkt.by/upload/resize_cache/iblock/e24/1024_1024_1/1da443e5d71ea931feb834359b8b7b0e.jpg
07:44 PM Wolf_: =/ I watched one of those sell on gov liquidation for >$8k
07:44 PM sync_: I like how they just took one of the stock cabins and slapped it on a frame
07:44 PM Wolf_: err less then
07:44 PM Wolf_: lol
07:44 PM Wolf_: now thats laziness
07:46 PM sync_: even with the wheelarch
07:46 PM Wolf_: yeah...
07:46 PM sync_: but tatra makes cool trucks
07:46 PM sync_: aircooled turbodiesels
07:47 PM gregcnc: those big Tatra are fun on the trials
07:47 PM Cromaglious_: the swing arm moular suspension is cool too
07:48 PM sync_: well, it is made to carry a drill tower
07:48 PM sync_: so it actually needs to handle offroad
07:49 PM sync_: and I guess if anybody knows how to build offroad stuff it is the russians
07:49 PM Cromaglious_: they were missile carriers first wernt they?
07:49 PM sync_: no, that is the civilan series by mzkt
07:50 PM Cromaglious_: sync_, not russian, but czech?
07:50 PM sync_: ah tatra
07:50 PM sync_: well, they made cars first I think
07:50 PM sync_: yes, tatra is czech
07:51 PM Cromaglious_: What I really want is a Kubota K8!
07:52 PM Cromaglious_: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwjr69T6ntfSAhWKgVQKHQNBAu4QtwIIKTAC&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3Dqd8jsCAOZQA&usg=AFQjCNGWpXuaHTgI6kWYjlylF-Wga1nNwA&sig2=dogFqi1y6W7xWdlC8mtRAw
07:52 PM sync_: what is the legal limit in the us for vehicle width?
07:52 PM Cromaglious_: 102"
07:52 PM Cromaglious_: 8'6"
07:52 PM Cromaglious_: 2.59m
07:53 PM sync_: oh, that is not so much
07:54 PM Cromaglious_: oversize permits are pretty easy to get. depending on width, it depends if you need pilot car or cars
07:55 PM sync_: yeha but that is lame
07:55 PM sync_: I was hoping you could actually register the topol m TEL
07:57 PM Cromaglious_: nope 8'6" is max.. mirrors can go a bit further out
07:57 PM gregcnc: we can ask trump to arrnge it
07:57 PM sync_: that thing is over 4m wide
07:57 PM sync_: :D
07:58 PM Cromaglious_: body can be 102' outside of tire to tire can be 108"
08:01 PM Cromaglious_: that would be fun driving in down town LA
08:02 PM Cromaglious_: 4m 13'1.4" 157 inches
08:02 PM gregcnc: we have this https://en.wikipedia.org/wiki/Oshkosh_M1070
08:05 PM Cromaglious_: last axle is a steer and drive
08:06 PM gregcnc: http://www.tfltruck.com/2016/12/owner-review-how-is-the-oshkosh-8x8-military-truck-as-a-daily-driver/
08:07 PM malcom2073: I want a hemtt
08:08 PM Cromaglious_: turning circle of 105'
08:09 PM Wolf_: not much bigger turning radius then a ’90- early 2000 F350
08:10 PM malcom2073: Hah true
08:11 PM Cromaglious_: FSCKER#(*%&@*&$@&$ they changed the demill code so now to be mutilated and no parts usable...
08:11 PM malcom2073: I saw that heh
08:11 PM malcom2073: Gotta love govt.
08:11 PM Cromaglious_: NO FREAKING REASON FOR THAT!!!!!
08:12 PM gregcnc: at 1% resale value they don't care
08:16 PM os1r1s: andypugh Ordered one of the Haimers
08:19 PM kyle___: god damn, it would be fun to really trick out one of those 8x8s
08:19 PM kyle___: put an enormous turbodiesel in it, do some weight reduction
08:20 PM kyle___: go crashing through some sand dunes at 70
08:20 PM kyle___: then again, that crane...
08:23 PM sync_: if you jump them they will almost instantly break
08:23 PM sync_: they are not made for that
08:24 PM kyle___: that's a buzzkill
08:25 PM Cromaglious_: Great Flite Test video https://www.youtube.com/watch?v=L-M6xZiGioM
08:25 PM kyle___: FT is great
08:27 PM CaptHindsight: i usually don't run Debian so how in Debian can you change the name of a User Account?
08:27 PM CaptHindsight: I wish to preserve all the configs in the users home directory
08:29 PM CaptHindsight: or should i create a new user and copy everything over then delete the old user?
08:30 PM os1r1s: Anyone got a good link to the pathpilot image?
08:33 PM CaptHindsight: looks like login as root and then change the username and the home folder
08:33 PM CaptHindsight: os1r1s: check the logs, somebody posted it somewhere after getting a copy
08:34 PM os1r1s: logs?
08:34 PM os1r1s: hmm, no bot response ...
08:34 PM os1r1s: Where do I check them?
08:34 PM CaptHindsight: search through there
08:35 PM os1r1s: Will do. Thx
08:56 PM Cromaglious_: I brought home a BOB and now I can't find it... grrrr
08:56 PM roycroft: a bag o' beans?
08:56 PM Cromaglious_: Battery operated boyfriend? nope... Break Out Board
09:06 PM os1r1s: CaptHindsight Is there a searchable version of that log by chance?
09:09 PM Tom_L: nope
09:10 PM os1r1s: Tom_L I was hoping to find a pathpilot link
09:23 PM jdh: I think you have to order teh 'backup disk' from them
09:23 PM jdh: https://www.tormach.com/store/index.php?app=ecom&ns=prodshow&ref=35246
09:24 PM os1r1s: jdh They won't sell me one
09:24 PM os1r1s: Unless i bought a machine
09:27 PM jdh: must be something newish. I know others have bought them before.
09:32 PM os1r1s: jdh So irritating
09:33 PM roycroft: i'm pretty sure i read somewhere that tormach do not sell their software to non-customers any more
09:34 PM jdh: that's what the page says
09:34 PM roycroft: mayhap that's where i read it :)
09:39 PM Wolf_: no link to where to get it on the forum pages?
09:39 PM os1r1s: Wolf_ I couldn't find it. I've been looking
09:40 PM os1r1s: Wolf_ If you find it, I would be grateful :)
09:47 PM CaptHindsight: anyone else having problems with Digikey lately?
09:47 PM CaptHindsight: shipping too late, account info messed up, etc
09:50 PM Cromaglious_: 46+haven't used them for decades
09:51 PM CaptHindsight: might go back to using Mouser
09:52 PM Wolf_: every time I have a electronics project I get stuck using both mouser and digikey...
09:52 PM Wolf_: but been 2yrs since I have ordered from either of them
09:53 PM CaptHindsight: I ordered well before the 8pm deadline yesterday and it wasn't shipped until today
09:53 PM sync_: as long as it is not arrow
09:53 PM CaptHindsight: after customer service said it should be fine
09:53 PM CaptHindsight: don't remind me
09:53 PM CaptHindsight: even newark is better
09:58 PM CaptHindsight: I just thought about Hmilton Avnet and gota sick feeling
10:16 PM Tom_L: your fault for listening to customer service :)
10:17 PM Tom_L: DK used to be top notch afik
10:17 PM Tom_L: mouser a close 2nd
10:20 PM jbcnc89: Hi guys, I have just installed a copy of linux CNC on vmware just to get a little familiar with the nuances of the software and I am running in to an issue when I try and start axis
10:20 PM jbcnc89: I have no parallel port installed on this PC and I was wondering if there was a way to run axis without one installed
10:20 PM Tom_L: sim
10:23 PM roycroft: i don't think i've ever had a problem with digi-key
10:23 PM roycroft: and i ordered from them quite recently - within the last month
10:24 PM roycroft: i don't think i've ever had a problem with mouser, either
10:24 PM os1r1s: Anyone here near Goshen, IN?
10:25 PM roycroft: allied, yes
10:25 PM roycroft: i drive through goshen oregon on my way home from work every day
10:25 PM jbcnc89: I just ordered a card, it should be here before too long but I was hoping to try the software before it got here -- Tom_L Do you have any experience with simulating the port?
10:26 PM Tom_L: pick a machine from the sim and try it
10:26 PM roycroft: i have a vm install of lcnc
10:26 PM enleth: I might have asked about this at some point but this one takes the cake: http://www.strippittech.com/Strippit_Ballscrew_Care_and_Replacement.html - can anyone from the US tell me if it's considered normal and correct to capitalize and hypenate text like that over there? Maybe it's some kind of a regionalism?
10:26 PM Tom_L: dunno if they are port specific, i doubt it
10:26 PM roycroft: it works fine in sim mode
10:26 PM Tom_L: i've run lathe and mill sims
10:26 PM enleth: that guy's whole webpage is written like that, and he hypenates all kinds of stuff that has no business being hypenated
10:27 PM roycroft: enleth: that does not resemble standard american english at all
10:27 PM roycroft: i think the author is half german, half crack head
10:28 PM roycroft: germans don't capitalize verbs though
10:28 PM enleth: roycroft: that's my impression as well, but it's not the first time I see english written like that, and every single time it was written by someone from the US
10:29 PM enleth: including capitalized verbs, and I think I've seen hypenation like that before
10:29 PM enleth: this one is just a tad extreme
10:29 PM roycroft: it's not even a regionalism
10:29 PM os1r1s: enleth I've seen people use hyphens to connect two words that form a phrase
10:29 PM roycroft: it's just wrong
10:29 PM os1r1s: That is somewhat common.
10:29 PM os1r1s: linear-motion for example
10:30 PM os1r1s: Its not correct, but it is commonplace.
10:30 PM roycroft: it's also hard to read
10:30 PM os1r1s: The capitalized verbs are something else entirely
10:30 PM roycroft: even if it were not for the garish color scheme it woul d be hard to read
10:30 PM enleth: yeah, but his front page says "Need Help? Then "Click-On" The Damn "Yellow-Buttons" at The-Left for More Information & Help!"
10:31 PM roycroft: i shouldn't be too concerned about it
10:31 PM roycroft: most browsers have a little button in the upper left hand corner that permits one to close a page :)
10:31 PM enleth: it's just so weird it got me curious
10:32 PM roycroft: consider it confirmed that it is not any kind of standard american english
10:33 PM os1r1s: Damn, Tormach is really proud of their lathe
10:33 PM enleth: I figured it might a thing in some hillbilly backwater that still thinks they're confederacy and speak/write like they did in the 1700s
10:34 PM roycroft: that was never any form of standard american english
10:34 PM roycroft: even in the days before we had standardized spelling
10:35 PM os1r1s: enleth I would not associate poor English with the confederacy. There are hillbilly-like people in all states. I've seen more in NJ than MS.
10:35 PM os1r1s: (I added a hyphen just for you)
10:35 PM roycroft: i live in eugene oregon
10:35 PM roycroft: springtucky is right next door to me :
10:35 PM roycroft: )
10:35 PM enleth: well, OK, so that's just a nutcase who somehow can fix machines
10:36 PM os1r1s: Its certainly odd
10:37 PM roycroft: my mother was born in southern illinois
10:37 PM roycroft: between springfield and st louis
10:37 PM roycroft: i've been in almost every state in the union
10:37 PM roycroft: every single state east of the mississippi
10:37 PM roycroft: the only place in this entire country where i've had a hard time understanding people because of their accent is where my mother was born
10:38 PM os1r1s: roycroft I'm in Memphis, so relatively close to that area
10:38 PM os1r1s: Or near Memphis
10:40 PM roycroft: i've never been to alaska, hawaii, kansas, oklahoma, and new mexico
10:40 PM roycroft: i think those are the only states i haven't visited
10:40 PM roycroft: so one could say i'm well-travelled in this country
10:42 PM os1r1s: Are there any good links to describe the sound of machine chatter?
10:44 PM Tom_L: you mean like fingernails on a chalk board?
10:44 PM ripple: its easier to describe vibrations during cut
10:45 PM GregB: https://youtu.be/DmALmLjWIN4?t=27
10:46 PM os1r1s: Tom_L Interesting. So not vibration but a high pitched squeel?
10:46 PM os1r1s: squeal
10:48 PM ripple: os1r1s: its impossible to give yes or no to these things. there are alot of variables, such as machine ridgidity, cutter sharpness, material, depth of cut, and sfm
10:49 PM ripple: chatter is often described as the tool bouncing off the work piece diving in and then bouncing back in again.
10:49 PM os1r1s: ripple I'm just looking for a description of what it sounds like. Not so much what causes it at this point.
10:50 PM os1r1s: Trying to optimize feeds/speeds and trying to make sure I know what to look for
10:51 PM ripple: when the part looks like this, after cutting, thats what it sounds like :P http://photos.imageevent.com/drumaholic/elvincymbals/exquisite%20lathe%20chatter.jpg
10:53 PM os1r1s: That is pretty wild looking
10:53 PM enleth: os1r1s: can't help with descriptions, but what helped me learn to tell good machining sounds from bad was watching Abom79, the audio quality in his videos is pretty good and he always comments on the sound if it's notable for any reason
10:55 PM enleth: os1r1s: although a lot of what he shows is slow speed big HSS cutter jobs, and high DOC turning on huge lathes, so that's not always directly comparable to how a CNC machine sounds
10:56 PM enleth: there's one universal rule, though - if it's high pitched, it's bad
10:56 PM enleth: like suqeaky, quealy or screeeching
10:56 PM enleth: *squealy
10:57 PM ripple: os1r1s: turning or milling?
10:57 PM os1r1s: ripple Milling alum
10:57 PM enleth: ripple: I can actually imagine the sound of this part being machined and it's painful to think about
11:00 PM ripple: os1r1s: dont change your rpm or feed, just get a shorter tool and work on a extremly solid clamping system, lockout one of your axis and make the same cut. if it sounds different you have a ridgidity issue
11:03 PM ripple: one you have a solid and STOUT working area then start doing test passes and try various sfm and feeds to identify with the sound of each cut, tool loadup and vibration
11:03 PM ripple: once*
11:04 PM ripple: every cutter sounds different, every machine, material, and ridgity has different tones and pitches, you have to recognize the sound of the material being cut or the tool "glancing" off at the given rate of speed. So a 4 flut cutter will give 4 ticks per rotations of squealing glances
11:08 PM ripple: if you want to learn about chatter, get a lathe and use a long boring bar, you'll learn in a hurry, or just watch videos of people using boring bars wrong, which is most of them
11:08 PM os1r1s: ripple I have a lathe, but a small one
11:08 PM ripple: get a boring bar
11:08 PM ripple: and boring deeper at a higher rpm than it calls for
11:08 PM ripple: just take a small cut
11:08 PM ripple: you will get chatter
11:09 PM ripple: and you will feel it in the machine and hear it immediatly
11:10 PM ripple: what chatter looks like from a boring bar, http://s12.photobucket.com/user/barrymilton/media/97971bfd.jpg.html
11:12 PM ripple: since you have 1 cutter and one moving surface its really easy to recognize, you can see the chatter lessen as the tool got deeper, this probably means the boring bar and machine was ridgid but the material was thin and vibrateded from hanging out of the chuck too far. simply holding the part all the way into the collet would have fixxed that
11:22 PM ripple: this is cool https://www.youtube.com/watch?v=V3QjAC1I1tY