#linuxcnc Logs

Aug 28 2018

#linuxcnc Calendar

12:47 AM Deejay: moin
02:19 AM Loetmichel: *gnhihi* Boss just came to me with a Panasonic CF20 (rugged convertible subnotebook)... "hey, i just removed the battery from the base... that is just a plastic placeholder... and it still runs. How is THAT possible?" $me:"Boss, that is a convertible. you can disconnect the display this way (*click Click*) and use it as a tablet... how do you thing that should work if the display doesent have
02:19 AM Loetmichel: its own battery?" Boss:" yeah, it you explain it that way it makes sense." :-)
02:46 AM trentster: Howdy all
02:49 AM trentster: I am testing spindle runout, if I check the inside bore of the spindle I see about 0.03 mm of runout but if I put the collet in with a collet nut and test runout on the endmill it shows about 0.12mm of runout. Does this mean that I should buy a precision collet and not use the one that came with the Chinesium spindle?
02:50 AM gloops: same with different endmills?
02:51 AM trentster: yeah, almost identical with diff endmills
02:58 AM gloops: it does seem like the collet is the problem
02:58 AM trentster: Then what?
02:58 AM trentster: The spindle itself?
02:59 AM gloops: well you said the spindle shaft is showing acceptable - or lower runout, so it isnt that
03:00 AM trentster: so where else do I look?
03:00 AM trentster: collet or collet nut is the only place left, right?
03:08 AM gloops: i would say so yes
03:11 AM miss0r: trentster: Perhaps a stupid question: How long from the spindle nose are you measuering 0.12mm runout on your endmill?
03:12 AM trentster: miss0r: about 20mm
03:13 AM miss0r: alright. Is the number significantly less if you measure on the endmill as close to the spindle nose as possible?
03:17 AM miss0r: trentster: ^
03:18 AM trentster: miss0r: To be honest I didn't check at different heights, I assume the runout would increase as distance from increases.
03:18 AM trentster: I can go and check of course.
03:18 AM miss0r: Well, if that number changes it can help us determin what kind of runout we are talking about. How did you measure the spindle runout?
03:19 AM trentster: dial test indicator on a mag base on a block of steel
03:19 AM miss0r: a dovetail inside the spindle taper?
03:21 AM trentster: I am not sure, it's a Chinese 2.2KW water cooled. Uses ER20 collets. I don't know if its dovetailed, I can check
03:21 AM trentster: but have to run out to the garage
03:21 AM miss0r: What I would like to know: what dial indicator did you use to check the spindle runout, and where did you place it?
03:22 AM miss0r: did you measure the runout 'inside' the spindle nose, on the ground taper that accepts the ER20 collets?
03:25 AM trentster: I tested with a cheapie ebay special that has a resolution of 0.01mm - I also have a Swiss made one with 0.001mm resolution but didnt test with that one. I preloaded it and placed the tip oriented upwards into the bore. When testing the collect and endmill i placed it against the side perpendiclar on the center line of the endmill.
03:25 AM trentster: Yes I tested inside
03:26 AM trentster: on the ground taper.
03:28 AM miss0r: That is alot of runout directly inside the taper...
03:28 AM trentster: miss0r: 0.03mm is a lot of runout for a cheap spindle?
03:29 AM miss0r: Another thing for you to test when you run to the garage: take a measurement on the endmill, close to the spindle nose. loosen the ER20 collect, and make sure it turns atleast 10degrees, and tighten it again. Measure runout again. Repeat this a few times to make it clear that the measurement changes or not when you move it
03:29 AM miss0r: That can help you determin if the collet is also to blame
03:30 AM miss0r: trentster: To be honnest I am not sure. But theres not spindles that I work on where 0.03 is even close to acceptable
03:30 AM miss0r: keep in mind, that number gets worse with tool stickout
03:31 AM trentster: miss0r: yeah, I bet you work with expensive spindals. I have no clue what is acceptable for a Chinese cheapie tho.
03:31 AM trentster: BTW thanks for your help, gonna go and test again now. back in 10-15
03:31 AM miss0r: alright, I'll be here
03:31 AM trentster: Thanks :-)
03:47 AM miss0r: jt you around?
03:52 AM trentster: miss0r: Ok back
03:52 AM miss0r: right, what've you got?
03:52 AM trentster: used the expensive swiss indicator that has a 0.002mm resolution
03:53 AM trentster: I even took video ;-)
03:53 AM miss0r: That sounds fun :)
03:53 AM trentster: So on the spindle itself inside the bore the runout is very low. 0.004mm believe it or not.
03:54 AM miss0r: That sounds more like something I would expect from a chinesium spindle
03:54 AM miss0r: Now we are in the realm of useable
03:55 AM trentster: with the collet and a endmill in, measuring about 10mm from the collet, the runout is 0.04mm
03:55 AM trentster: so 10X increase
03:57 AM trentster: miss0r: Strange right?
03:57 AM miss0r: well, no :)
03:57 AM Loetmichel: trenster: i have 2 of these chinese 800W watercooled spindles with ER11... both have no measureable runout with a 0.01 dial 10mm below the collet on a 6mm shaft.
03:57 AM Loetmichel: you cant see the dial hand move
03:58 AM miss0r: trentster: We have no idea what is going on in the spindle taper. Well, we can see at one particular circle around the ID the runout is 0.002mm which is nice :)
03:58 AM Loetmichel: but i heard that sometimes the ER11 cone in them is badly ground and they have plenty of runout. easily fixable though if you have a lathe and a dremel
03:58 AM miss0r: the taper *could* be off angle wise.
03:58 AM trentster: miss0r: oh yeah it is tapered inside the bore, I checked
03:58 AM miss0r: Better hope so, with the ER20 to go in there :D
03:58 AM trentster: Should I check at different heights?
03:59 AM miss0r: anyway. did you measure the runout on the endmill after turning the ER20 collet ~10degrees and tighten it again?
03:59 AM trentster: Lol, yeah no taper it would not work…silly me. Doh!
03:59 AM trentster: Loetmichel: that sounds pretty impresive, sounds like you got lucky twice (Spindle wise) ;-)
03:59 AM Loetmichel: i suppose the bigger spindles of the same make (just with 2.2kw and ER20) are made the same way so have the same QA issues ;)
03:59 AM miss0r: (making sure the er collet moves inside the taper before retighten)
04:00 AM gloops: something else to play with - same tool, same collet - any variation when it is refitted
04:00 AM Loetmichel: trentster: indeed
04:01 AM gloops: with my china er11 i sometimes get a poor fit, i havent really thought it through as to whats happening, but you stick the tool in, nip it up and its all over
04:01 AM gloops: take it out, put it back - fine
04:02 AM gloops: maybe the thread is starting with the collet/tool misaligned and trapping it out of true
04:04 AM miss0r: Do any of you have experience with the Accuratus brand stainless keyboards ?
04:11 AM miss0r: let me ask in another way: can you guys recommend an affordable keyboard preferably with a touchpad / ball moust build-in, that can handle being used for a cnc controller + being panel mounted?
04:13 AM Loetmichel: miss0r: i used those "roll up" silicon keyboards on my home mill
04:13 AM Loetmichel: because of swarf... it sits right under the mill
04:13 AM miss0r: i've only ever owned one.. and that was not all joy
04:13 AM miss0r: It killed a motherboard :D
04:13 AM miss0r: But that was alot of years ago. I guess that could make sense. I wouldn't mind having a clean looking stainless steel one though
04:14 AM Loetmichel: atthe company i use cheap 3 eur keyboards that were surplus from a customer job... so i have 100s of them in stock
04:15 AM Loetmichel: every few weeks they get changed when they start to have issues with aluminium swarf creeping under the keys
04:18 AM miss0r: hehe. Yeah
04:18 AM miss0r: I must admit, I was hoping to make a realy pro looking box here.
04:18 AM miss0r: Still debating myself if I want a touchscreen or not
04:19 AM miss0r: I have a 17" marine grade touchscreen from hatteland laying around, but if I remember correctly, It had some issues. So I am not one for designing a new cnc controller around it
04:21 AM Loetmichel: i advise against using capacitive touch in areas where the air is sometimes saturated with small aluminium swarf.
04:21 AM Loetmichel: better go resistive there
04:21 AM Loetmichel: they also work with gloves on ;)
04:26 AM miss0r: indeed
04:37 AM HexaCube: Heyo
04:37 AM HexaCube: Sooo, I got a quick questiom
04:38 AM HexaCube: Is it possible to interface with other devices using linuxcnc, say, a serial interface or USB?
04:41 AM HexaCube: And if so, where should I look to find some info on how to do that
04:42 AM XXCoder: not sure what you mean
04:44 AM HexaCube: Well say I wanna make a little device that measures the current that flows through a spindle
04:44 AM HexaCube: I would need a way to tell linuxcnc that value, so it can display it?
04:44 AM XXCoder: ahh I understand
04:45 AM XXCoder: im sure either wiki has or someone can answer
04:45 AM XXCoder: my guess is that you can with one of input pins, in volt value
04:45 AM XXCoder: min-max
04:46 AM HexaCube: Oh, the parallel port can sense analog voltage?
04:46 AM XXCoder: I remembered it to be so, but I could be wrong
04:46 AM XXCoder: my memory is super fallable now
04:51 AM X704 is now known as tiwake
05:15 AM Tom_L: hexaCube, or you could get one of these: https://www.aliexpress.com/item/New-DC-6-5-100V-0-20A-LCD-Display-Digital-Current-Voltage-Power-Energy-Meter-Multimeter/32765908468.html
05:15 AM XXCoder: hes not in
05:15 AM Tom_L: i know but he'll be back
05:15 AM XXCoder: his isp have been troublesome and I guess it finally disconnected long term
05:16 AM XXCoder: thats interesting but I dont see any spindle flow
05:16 AM XXCoder: also, can parallel take volt range input? I remember yes but...
05:17 AM Tom_L: it won't be big enough for some spindles
05:18 AM Tom_L: up to 20 chinaco Amps
05:18 AM XXCoder: ah I missed "current
05:18 AM XXCoder: i was thinking coolant flow for some reason
05:19 AM XXCoder: little bit sick and way tired
05:21 AM Loetmichel: *heyhoo* china delivery arrived! -> https://imgur.com/vtsuV5a
05:22 AM XXCoder: woot
05:22 AM Loetmichel: .... now i have to make a nice Stand and housing for it... and a second one...( coworker has ordered the same for his home, so i will make 2 of each thing)
06:08 AM fragalot: hey
06:09 AM jthornton: dang I over slept
06:10 AM fragalot: jthornton: if you were to purchase a CNC machine to machine electrical panels... what would you get?
06:10 AM gloops: hmm slightly snaggy thing with 360
06:10 AM gloops: copy and paste from one plane to another
06:10 AM jthornton: machine electrical panels like for the holes?
06:11 AM fragalot: yes
06:11 AM fragalot: cabinets can vary from 200x200x100 to full size Rittal TS8 series
06:12 AM fragalot: material varies from PC to painted steel & stainless
06:13 AM jthornton: I have one of these for that job https://www.greenlee.com/products/DRIVER%2540dPUNCH-HYD-1%2540F2X1-(1731).html?product_id=19206
06:13 AM fragalot: we're trying to move away from that as it takes too much time :)
06:14 AM fragalot: we've got the battery powered one, but you still need to manually drill the pilot holes, do layout etc,..
06:14 AM jthornton: machining the holes is a problem with vibration
06:14 AM XXCoder: fragalot: puncher macine
06:14 AM fragalot: it is
06:14 AM Loetmichel: any germans here that checked that PC for latency? -> https://www.itsco.de/pc-dell-optiplex-760-sff-intel-core-2-duo-e8500-2x-3-16ghz.html
06:14 AM jthornton: so I'm guessing a plasma cutter
06:14 AM fragalot: XXCoder: only works if we can remove the panels. can't do that on the stainless series
06:14 AM fragalot: plasma doesn't work on PC
06:14 AM Loetmichel: before i order two of them and it has some NMI that make it useless for LCNC
06:14 AM jthornton: pc?
06:14 AM fragalot: polycarbonate
06:15 AM jthornton: ah yea water jet
06:15 AM fragalot: glass filled too for your delight :-)
06:15 AM gloops: punch will crack poly?
06:15 AM jthornton: I take it your shop does a lot of panels?
06:15 AM fragalot: jthornton: estimated 800 a year?
06:16 AM fragalot: so not /THAT/ much, but enough to consider doing it in-house
06:16 AM gloops: one of those scara arms carl had or a gantry router/mill
06:16 AM jthornton: what does the sub use to make the holes?
06:16 AM fragalot: 1980's clapped out horizontal mill
06:17 AM fragalot: and lead on double sided tape to reduce chatter :P
06:17 AM jthornton: that must be a mess
06:17 AM jthornton: can you punch the pc?
06:17 AM fragalot: he doesn't machine through the lead, obviously
06:17 AM * jthornton has never tried
06:17 AM fragalot: the PC can't be punched properly
06:18 AM fragalot: it jams up the dies
06:18 AM fragalot: and wears them out like no tomorrow
06:18 AM jthornton: the PC probably machines ok I'd guess but like you say the glass is hard on tools
06:19 AM fragalot: it kinda likes to extrude between the die & punch
06:19 AM XXCoder: too bad
06:19 AM jthornton: IIRC the very few PC panels I did with a step bit
06:19 AM fragalot: that's what we do now if we need to quickly add a hole
06:20 AM jthornton: like opps I need another button?
06:20 AM fragalot: i'm wondering now about the waterjet suggestion if that's feasible at all
06:20 AM fragalot: exactly :D
06:20 AM fragalot: customer changes their mind halfway through the order, etc
06:20 AM jthornton: yep
06:21 AM jthornton: I assume you would have to have the box closed but submerged to water jet the holes
06:21 AM fragalot: wondering though how we'd do the bottom on the 600x600x210 panels in a waterjet
06:21 AM fragalot: yeah
06:21 AM fragalot: but I can't find specs on how deep the water bed is
06:21 AM fragalot: also - mixing stainless with painted steel would be bad m'kay
06:22 AM * jthornton had to get a calculator out to see how big of a panel that is
06:22 AM fragalot: :P
06:23 AM SpeedEvil: fragalot: painted steel tanks are OK, as long as you maintain them
06:23 AM fragalot: that's the largest size that does not have a bottom panel you can take out
06:23 AM jthornton: I know you can't use the same sander or grinder on steel and stainless
06:23 AM fragalot: SpeedEvil: that's not what I mean
06:23 AM fragalot: SpeedEvil: I mean cutting both steel and stainless with the same waterjet
06:23 AM SpeedEvil: ah
06:25 AM fragalot: thinking a large envelope horizontal mill may be the most versatile solution
06:25 AM fragalot: since you can just swap out endmills between the different materials to avoid contamination
06:26 AM fragalot: downside is having to deal with major chatter ._.
06:26 AM jthornton: yep
06:26 AM SpeedEvil: fragalot: why is that a problem (waterjet)
06:26 AM fragalot: SpeedEvil: it contaminates the stainless causing it to rust
06:26 AM jthornton: yep
06:26 AM SpeedEvil: the backwash from the backing tank?
06:27 AM fragalot: yes
06:27 AM fragalot: since the panel will need to be mostly submerged to cut the sides
06:27 AM * SpeedEvil wonders if just adding a lot of citric acid would work.
06:28 AM fragalot: there's the purpose-built rittal perforex routers
06:41 AM miss0r: fragalot: ! News on the mill?!
06:42 AM fragalot: I got an email confirming it had indeed arrived in .BE and they would call me to arrange delivery
06:42 AM miss0r: using your last day off to get it, ay ? :]
07:21 AM miss0r: have any of you sucessfully used one of those wireless handwheels for linuxcnc? (one of those claiming only to be for windows & mach3)
07:44 AM gloops: .
08:04 AM fragalot: schenkers' tracking number now states my schaublin was delivered
08:04 AM fragalot: yet i'm not home
08:04 AM fragalot: ._.
08:04 AM fragalot: it also states "not delivered" in the details window
08:04 AM miss0r|office: hahaha
08:04 AM miss0r|office: sounds about right....
08:04 AM fragalot: I'm confused. :)
08:06 AM * miss0r|office is just starting to be worried about the scrap merchants in your neighborhood
08:09 AM fragalot: shut up
08:09 AM fragalot: :P
08:35 AM fragalot: rescheduled for tomrrow
08:35 AM fragalot: at which poitn they will ACTUALLY call
08:35 AM fragalot: also - turns out that they tried to call me 10 minutes ago (6 hrs after they tried to deliver), but my phone went sideways & did not notify me
08:35 AM fragalot: had to reboot it and got a load of "missed call" notifications :P
08:35 AM fragalot: murphy++
08:39 AM miss0r|office: +++^2
08:42 AM * miss0r|office tried to remember some saying about 'the harder the journey, the sweeter the destination' something like that
08:45 AM gregcnc: miss0r|office http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Using_A_XHC-HB04_Wireless_MPG_Pendant
09:00 AM jthornton: geez fragalot your just having all bad luck it should improve when you get your hands on the machine
09:00 AM fragalot: hopefully
09:16 AM gloops: .
09:16 AM gloops: this nickserv lark is a pita
09:16 AM HexaCube: hey folks
09:16 AM HexaCube: log?
09:16 AM HexaCube: ... how did that command work?
09:16 AM jthornton: LOG
09:17 AM HexaCube: well, i was close to be fair :P
09:17 AM gloops: its now $2 to look at the log
09:17 AM jthornton: lol
09:18 AM HexaCube: welp, thank god, today was payday! :P
09:18 AM HexaCube: okay i just got a single reply to my question earlier, may I ask it again?
09:18 AM Wolf__: no
09:18 AM HexaCube: I had to disconnect shortly after :S
09:18 AM Wolf__: :P
09:18 AM jthornton: we don't ask to ask we just ask the question
09:19 AM HexaCube: jthornton: i know that, but I feel it's rude to ask the same thing twice so I usually don't do that :P
09:19 AM HexaCube: anydoot
09:20 AM HexaCube: essentially, can I somehow connect devices to linuxcnc so I can fetch some kind of data from it? The example being a spindle load sensor. I could work out how to do it on the hardware side, but how do I get that data to linuxcnc to ideally display it? :P
09:20 AM jthornton: well yea if you ask every 15 minutes but if it's hours later then might be a different group watching
09:20 AM gloops: the one about using usb to inferface from linuxcnc?
09:20 AM HexaCube: gloops: not necessarily USB
09:20 AM HexaCube: just... what kinda options do i have? Serial, I2C, SPI etc
09:20 AM HexaCube: basically, any MCU <-> PC/Linuxcnc connection
09:21 AM HexaCube: I read a bit about this HAL thing at work
09:21 AM HexaCube: it seems like that's going in the right direction
09:24 AM gloops: not my dept, if nobody here knows wait for andypugh
09:24 AM gloops: my depmt is trying to make things from scrap iron and old bike parts
09:24 AM HexaCube: alright, thank you! I have only a small clue about coding in general but i'd love to be able to customize my router a bit :P
09:25 AM gloops: what andypugh doesnt know about advanced manufacturing isnt worth knowing
09:25 AM Wolf__: jthornton: what size steppers are you running on your plasma table?
09:25 AM jthornton: 23
09:25 AM jthornton: 56v power supply and gecko 203v drives
09:26 AM * jthornton heads to town to ship packages
09:26 AM HexaCube: *sigh* I still haven't settled on what drivers to go with
09:26 AM Wolf__: ~425 or smaller
09:27 AM pcw_home: using SPI/I2C,Serial, etc depend on 2 things: what hardware the host has and whether there's a real time driver for that hardware if you intend to use it for motion
09:27 AM HexaCube: no need for real time I think
09:28 AM pcw_home: if it not for motion/real time, you can use an userland interface/python etc
09:28 AM pcw_home: if it for step generation/encoder counting/home switches etc it needs real time
09:28 AM HexaCube: no, basically it's just supposed to be a current sensor
09:29 AM HexaCube: current == motor load and if a certain current is reached I want to estop, something like that
09:29 AM pcw_home: If the sensor filters the current then a userland interface is probably OK
09:30 AM HexaCube: but I'd be super interesting to have a 0..100% kinda thing for the load
09:30 AM HexaCube: I could probably trigger a realtime(?) estop seperately
09:30 AM pcw_home: you can do this with modbus/VFDs
09:32 AM HexaCube: well, I plan on building my own spindle using a RC brushless motor. I was planning on driving that one using an ESC
09:32 AM pcw_home: You could also probably fake this pretty well by just measuring the spindle speed vs expected spindle speed
09:32 AM HexaCube: which doesn't really provide feedback but would also be cheap :P
09:32 AM HexaCube: cheap-er
09:32 AM pcw_home: (possible passed through the lincurve comp)
09:33 AM HexaCube: measuring current should be fairly simple to do, hardware wise
09:33 AM pcw_home: measuring current a on BLDC takes 2 sensors
09:33 AM pcw_home: and math
09:33 AM HexaCube: 2 sensors?
09:33 AM pcw_home: 2 phases
09:34 AM HexaCube: oh well I'd measure the DC current from the PSU probably
09:34 AM HexaCube: because the PSU limits me on the power
09:34 AM pcw_home: that does not give you the motor current
09:35 AM pcw_home: you can have 1A of PS current and 20A of motor current
09:35 AM pcw_home: (if running slow)
09:35 AM HexaCube: huh? How would that work? O_o
09:36 AM gregcnc: that's how it works
09:36 AM pcw_home: this may not matter on a router which is mostly running flat out
09:36 AM HexaCube: is that refering to the motor inductivity?
09:37 AM pcw_home: the driver works as a step down switching regulator so if the motor is stalled you can have very high motor currents at minimal PS current
09:38 AM pcw_home: (just enough PS current to supply the I^2R losses in the motor)
09:38 AM HexaCube: the way I understood an ESC works is by simply switching around the different phases to either Vmot or GND?
09:38 AM gregcnc: if using a rc esc you basically wouldn't want to run low rpm using throttle
09:39 AM HexaCube: either way, I am concerned about drawing more current than the PSU can provide so that is what I wanna measure =)
09:39 AM gregcnc: my setup runs full on, but from a variable bench supply for setting rpm
09:40 AM gregcnc: so LCNC only turns the spindle on/off
09:43 AM HexaCube: okay so I'm reading that ESCs abuse the motor coils to make it a SMPS, very cool.
09:43 AM gregcnc: correct
09:43 AM pcw_home: If you measure PS current and know spindle RPM (and PS voltage) you do know the approx torque
09:43 AM gregcnc: not abuse, take advantage
09:44 AM HexaCube: gregcnc: ah, darn language barrier :P
09:44 AM gregcnc: ah i could see that translation
09:45 AM HexaCube: it's "verwenden" in german, which translates to use. Use/Abuse, pretty close .P
09:45 AM HexaCube: * ;P
09:49 AM HexaCube: *sigh* earning money just takes way too long
09:49 AM HexaCube: and my car inspection is coming up *doublesigh*
09:49 AM HexaCube: who wants to give me some money?
09:51 AM gregcnc: this guy did a spindle like this not long ago, not much detail on his account though https://www.instagram.com/p/BbVpapenIrt/
09:51 AM HexaCube: oh great, that one's even smaller than mine, hehe
09:51 AM HexaCube: I saw a very nice build linked here recently, I think I'll be grabbing some ideas from it :P
09:52 AM HexaCube: http://www.dieselrc.com/projects/cncspindle/
09:52 AM HexaCube: this one amongst others
09:52 AM gloops: arent those dental spindles ok for pcb engraving?
09:52 AM gregcnc: iirc he got lucky and didn't have trouble with balance
09:52 AM gregcnc: that one is mine
09:53 AM HexaCube: gloops: yes but they're probably not that nice for anything else :P
09:54 AM gloops: well the standard issue 800w chinese router spindle gets 24k rpm, control through linuxcnc/gcode
09:54 AM gloops: also good for wood and even ally
09:54 AM HexaCube: 54k RPM is my theoretical goal :P
09:54 AM HexaCube: that's what the motor can do at 36V
09:55 AM gloops: but wont cut anything at 12000 ?
09:55 AM HexaCube: heh, a coworker managed this recently... https://i.imgur.com/AQDkxiU.png
09:56 AM gloops: you also need appropriate feed for cutting ally at that speed
09:56 AM HexaCube: gloops: don't motors have more torque at lower speed?
09:57 AM HexaCube: I can always run it slower
09:58 AM gloops: well it would be worth knowing about the specific motor
09:58 AM HexaCube: sure, one sec
09:58 AM HexaCube: sadly, no datasheet. https://hobbyking.com/de_de/turnigy-sk3-90mm-8s-3000w-fandrive-brushless-edf-motor-3968-1500kv.html?___store=de_de
09:58 AM HexaCube: in EN: https://hobbyking.com/en_us/turnigy-sk3-90mm-8s-3000w-fandrive-brushless-edf-motor-3968-1500kv.html?___store=en_us
09:59 AM gloops: the issue with the 800w air cooled is that the cooling is inefficient at low speeds and im pretty sure torque actually drops off at lower speed
09:59 AM HexaCube: my plan is to run that motor at ~500W max and giving it a watercooled jacket
10:00 AM gregcnc: if you intend to use throttle to operate the motor at low RPM, make sure you oversize the ESC
10:00 AM HexaCube: throttle?
10:00 AM HexaCube: uh... but yes I do plan on doing that
10:00 AM gregcnc: motor PWM
10:01 AM gregcnc: this is where the previous mentioned current will bite you
10:02 AM gregcnc: a 20amp controller will not tolerate 25% PWM and 20A input or even 5A input for long
10:02 AM HexaCube: because it's 5A input would be WAY more on the motor side?
10:03 AM HexaCube: but yes, I'm seeing 100A+ ESCs for a reasonable price
10:03 AM gregcnc: that is an option.
10:10 AM HexaCube: gregcnc: you said the dieselrc spindle is yours?
10:11 AM gregcnc: yes
10:11 AM HexaCube: is there any particular reason for using stainless steel over say, normal steel or alu?
10:13 AM gregcnc: so I didn't have to worry about rust
10:14 AM HexaCube: I'm really curious about how I'll manage to make the two.. "pockets" for the bearings though
10:14 AM gregcnc: lathe?
10:14 AM HexaCube: generally we're told if we get the part out of the chuck and put it back on, it's out of round
10:16 AM HexaCube: one of the lathes has this kinda chuck that looks like an ER collet, but much much bigger :D
10:16 AM gregcnc: sure
10:16 AM HexaCube: was told that *that* will run round even after refitting the part
10:17 AM HexaCube: but the other lathe is much nicer to work on ;_;
10:17 AM HexaCube: plus I don't know how you get a part running round on a normal chuck
10:17 AM gregcnc: turing the bore ont he back was done in soft jaws for this reason
10:17 AM HexaCube: ohhh
10:17 AM HexaCube: okay
10:17 AM HexaCube: i see
10:20 AM HexaCube: ah, i found the kinda chuck I meant: https://www.ortlieb.net/fileadmin/ortlieb/produkte/werkstueckspannung/QUADRO_Druckspannfutter_Reduzierteile.jpg
10:22 AM CaptHindsight: oh man i want to see it run at full 110A @ 30V
10:26 AM HexaCube: gregcnc: so... it looks like you took the motor out of it's original housing, is that correct?
10:26 AM gregcnc: I did
10:26 AM HexaCube: that's cool, i was wondering if that's possible
10:26 AM gregcnc: some easier than others
10:26 AM HexaCube: because ideally I don't want to keep the motor's bearings
10:27 AM Loetmichel: *MAAAAN* why me? Just destroyed a heatpipe... bent it by hand and managed to flatten it in one bend... and the other end is already soldered into the CPU cpu block...
10:31 AM HexaCube: gregcnc: so, sorry for asking all of those question but I never disassembled a motor. is the rotor some kind of pressfit onto the shaft?
10:31 AM gloops: lol
10:31 AM gregcnc: capthindsight they say 7-8kW for this one https://youtu.be/HrZFLl8uPiU?t=47s
10:31 AM HexaCube: to my understanding it has to be otherwise the shaft would slip, but... idk
10:32 AM HexaCube: gregcnc: yes, for a few seconds I gues s:P
10:33 AM gregcnc: rotor assembly varies. one reason i chose the motor i did is due to the large rotor diameter which i could fit over the 20mm collet shaft. Some are solid magnet glued onto the 6 or 8mm shaft
10:34 AM HexaCube: yes, I was going for an C8 ER11 shaft so I can use 608 size bearings
10:34 AM HexaCube: should be easier on my bank account :P
10:34 AM HexaCube: the motor has an 8mm shaft, too
10:35 AM CaptHindsight: mit dem sonic booms!
10:36 AM gregcnc: I used to fly fast stuff 20 years ago, back then my setup was 10 cells NiCD and only 70A good for ~150MPH
10:37 AM gregcnc: with 8mm shaft, I wouldn't consider using cutters larger than 4mm
10:37 AM gregcnc: but maybe it would be OK
10:40 AM HexaCube: well I just wanna do soft materials and PCBs (which use tiny v cutters anyways)
10:40 AM HexaCube: I would love to go with an ER16 20mm shaft collet, but then everything would cost way more hehe
10:41 AM gregcnc: well i crashed a carbide cutter and bent the 20mm
10:41 AM HexaCube: oh wow O_O
10:41 AM HexaCube: well I'd love to implement a stall-detection feature :D
10:41 AM HexaCube: well, you could still crash, though
10:42 AM gregcnc: could be that particular shaft was soft, another has also crashed but not bent
10:48 AM gloops: https://news.sky.com/story/passengers-hail-world-first-test-run-for-self-driving-taxi-in-tokyo-11484087?dcmp=snt-sf-twitter
10:48 AM gloops: tesla out of the running again
10:49 AM srk: HexaCube: https://hobbyking.com/en_us/watercooled-brushless-inrunner-3660sl-3180kv.html?___store=en_us
10:50 AM srk: here in action with HK 150A ESC http://48.io/~rmarko/cnc/spindle0.mov
10:51 AM HexaCube: srk: meh, I purposely went for a rather large (physical mass) motor so I don't heat it up as much.
10:51 AM HexaCube: plus it's just 5mm shaft diameter
10:53 AM srk: no problem with coupler
10:54 AM HexaCube: right but... directly using the toolholder as a shaft is more elegant imo :P
10:55 AM srk: "just... what kinda options do i have? Serial, I2C, SPI etc"
10:55 AM srk: CAN :]
10:57 AM srk: "directly using the toolholder as a shaft is more elegant" <- if you can replace it without damaging the bearings
10:57 AM HexaCube: well as you can see with gregcnc's spindle, I'd be using new bearings anyways
10:58 AM srk: yeah, that might work
10:58 AM srk: our first spindle was built that way but it's not good for anything beyond wood/pcb milling
10:58 AM HexaCube: just no angular contact bearings I'm afraid, but at my loads normal ball bearings should work fine
10:59 AM HexaCube: I don't plan on milling much more than that, anyways
10:59 AM srk: as you need a pair of angular contact bearins on the bottom for heavier loads
10:59 AM srk: should be good
11:00 AM HexaCube: I'm so not looking forward to machine the fittings for the bearings though ;_;
11:00 AM HexaCube: I hated turning precise holes
11:47 AM miss0r: Goodevening
12:11 PM HexaCube: sooo, something I keep seeing on youtube are epoxy granite machines.
12:11 PM HexaCube: What exactly are the benefits of epoxy granite? I'm thinking low expansion when the temperature changes aswell as rigidity?
12:15 PM pcw_home: good vibration damping...
12:16 PM pcw_home: think thud instead of ping...
12:21 PM pcw_home: Wikipedia says 10X better than cast iron, 30X better than (rings like a bell) fabricated steel
12:22 PM miss0r: heh. Here I was thinking it was 11 times better than cast iron
12:23 PM HexaCube: hmm, that sounds impressive, I see
12:27 PM gloops: on the downside - 10 x the cost of cast iron
12:28 PM miss0r: gloops: Not on oneoffs ;) You try making someone pour cast iron into your mold, at the same cost of doing epoxy at home ;)
12:29 PM gloops: not that expensive for iron miss0r if you find the right place
12:29 PM miss0r: It must just be I never quite did
12:30 PM gloops: seems fragalot was right f360 does 5 axis now https://www.youtube.com/watch?v=LuED2IbdcOs&feature=youtu.be
12:31 PM gloops: http://www.iron-foundry.com/cast-iron-prices-pound-kilogram-ton.html
12:32 PM HexaCube: hehehe
12:32 PM HexaCube: dandong
12:32 PM * HexaCube is immature
12:32 PM HexaCube: also I just realised that this isn't #reprap
12:32 PM HexaCube: sorry :P
12:33 PM gloops: dont go with dingdong though
12:42 PM roycroft: those are pre-tariff prices
12:55 PM gloops: lol
12:55 PM gloops: you can get it cheap somewhere local roycroft
01:15 PM fragalot: 'sup
01:16 PM gloops: eta to cutting with new machine fragalot
01:19 PM fragalot: god knows, but it is due to arrive tomorrow morning
01:19 PM fragalot: </famous_last_words>
01:19 PM fragalot: (again)
01:20 PM * JT-Shop takes a minute break
01:25 PM * fragalot distracts JT-Shop for a minute
01:27 PM FinboySlick: fragalot: You are following in the footsteps of This Old Tony with that schaublin.
01:27 PM FinboySlick: I can think of few greater role models ;)
01:27 PM fragalot: :-)
01:28 PM fragalot: I think his is a slightly newer model, or at least the milling head he's got is
01:28 PM fragalot: based on serial # I think mine would be 1968 or 1969 vintage
01:28 PM FinboySlick: Soon, all we'll be able to see are your hands and you'll start talking into stitched 5 second bits of sentences.
01:29 PM fragalot: hehe
01:29 PM fragalot: I do love his video style
01:29 PM * JT-Shop notices the break minute is up and wanders over to the blaster
01:29 PM fragalot: JT-Shop: if this is how long a minute takes on your clock I would love to see your rates :D
01:29 PM FinboySlick: fragalot: I sadly passed on a pretty decent Schaublin 53 a couple years ago.
01:29 PM FinboySlick: $6k.
01:29 PM fragalot: FinboySlick: mistakes happen
01:30 PM fragalot: I've spent 5k2 on this one
01:30 PM FinboySlick: Not sure it was a mistake. I can't handle that much iron.
01:30 PM fragalot: but it comes with a high speed head, an indexing head, the standard milling head, and a few boxes of other accessoires
01:30 PM FinboySlick: I'd love to be able to but I'd really need a proper shop for that.
01:30 PM fragalot: i've got a garden shed
01:30 PM fragalot: still not sure how i'll get it in there
01:30 PM fragalot: :D
01:30 PM * fragalot hides any sign of panic
01:30 PM gregcnc: concrete floor?
01:31 PM fragalot: yes, about 60cm deep
01:31 PM fragalot: with an elephants foot sticking out in the corner i'm going to put the mill
01:31 PM fragalot: so it SHOULD be ok with a mere 800kg machine on it :-)
01:32 PM gregcnc: what was your shed designed for?
01:32 PM fragalot: the slab was requested to be 30cm thick but the contractor dug it too deep because he aligned the wrong end
01:33 PM fragalot: so we decided to just increase the concrete pour because I didn't want to have an unstable backfill to raise it again
01:33 PM fragalot: the shed itself is a cheerful wooden panel DIY kit
01:37 PM fragalot: and the elephants foot part is because the contractor's bracing failed and it splurged out one side a bit :P
01:41 PM Tom_L: chatty day today...
01:42 PM Tom_L: Loetmichel next time fill it with water and cap the ends
01:42 PM Tom_L: ... if possible
01:45 PM Tom_L: fragalot, hope it doesn't end up like the leaning tower...
01:45 PM fragalot: shouldn't do, it's very solid underneath and the bearing surface is much wider than the shed itself
01:45 PM fragalot: (with a raised portion underneath the shed to keep water ingress out)
01:46 PM Tom_L: is the 60cm the footing?
01:46 PM Tom_L: should be ok
01:46 PM fragalot: yeah it'l do
01:46 PM Tom_L: or is that the whole floor?
01:47 PM Tom_L: you could land a plane on that if so :D
01:47 PM fragalot: it is :P
01:47 PM Tom_L: we had a dreamlifter land at the wrong ( small ) airport a while back
01:47 PM Tom_L: cost them a new airstrip
01:47 PM fragalot: ouch
01:47 PM Tom_L: i bet the pilot got fired too
01:48 PM Tom_L: it was an issue taking off again too as the strip wasn't long enough
01:48 PM fragalot: should 've pulled a fuse & claimed emergency landing :P
01:48 PM Tom_L: the air strip is somewhat in line with the intended air base strip
01:48 PM Tom_L: they brought in a special team to move it
01:50 PM Tom_itx: https://www.aopa.org/news-and-media/all-news/2013/november/21/boeing-747-dreamlifter-mistakenly-lands-at-jabara-airport
01:50 PM Tom_L: it's been several years
01:51 PM Tom_L: cracked the runway but they got it out
01:53 PM miss0r|office: fragalot: When are you planning on having it delievered? Friday perhaps?
01:53 PM fragalot: tomorrow mornin
01:53 PM miss0r|office: re-he-he-healy?
01:54 PM miss0r|office: So you are taking a day off tomorrow?
01:54 PM fragalot: yes
01:54 PM fragalot: 3rd time is the charm
01:54 PM miss0r|office: Nice.. Will that give you enogh time to set up the video cameras of your walkway & shed and setup a youtube livefeed?
01:54 PM fragalot: time, yes
01:54 PM fragalot: cameras, eh
01:54 PM fragalot: damnit
01:54 PM miss0r|office: :]
01:55 PM fragalot: the dutch guy is sending your biax to my work address
01:55 PM fragalot: >.>
01:55 PM Tom_L: some events are worth pics...
01:56 PM fragalot: Tom_L: pictures, certainly
01:56 PM fragalot: video.. not my thing
01:56 PM Loetmichel: Tom_L: a heatpipe?
01:56 PM Tom_L: yeah well i did it with some tubing for a heatsink on the mill
01:56 PM Loetmichel: thats a closed 6mm copper tube with some butane or alcohol inside, and a pressure that make that boil at 55°c
01:56 PM Tom_L: worked better than i expected
01:57 PM Tom_L: i see
01:57 PM Loetmichel: (and condense at the cold end)
01:57 PM fragalot: Loetmichel: isn't it also normally stuffed with copper wool?
01:57 PM Loetmichel: fragalot: copper wool, micro channels on the inside or sintered metal
01:57 PM Loetmichel: three types
01:57 PM fragalot: :-)
01:58 PM Loetmichel: the microchannel works best but needs a gravity feed
01:58 PM Loetmichel: the other two work in any orientation, but less effective
01:58 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/spindle_cooler/Cooler1.jpg
01:58 PM Loetmichel: and the sintered one has a lot larger bending radius for obvious reasons
01:58 PM Tom_L: sprayed water out the crease as i bent it but it worked great
01:59 PM miss0r|office: fragalot: how nice of him. When do you expect it to get there?
01:59 PM fragalot: probably tomorrow, so i'll have it sitting on my desk when I come in the day after
02:00 PM FinboySlick: One of the things that strike me most for some reason about biax scrapers is how noisy they are.
02:00 PM fragalot: FinboySlick: they really sound awful in comparison to how smooth the motion is, lol
02:01 PM FinboySlick: Some sort of induction or servo motor would probably help a lot.
02:01 PM FinboySlick: I mean it's a job that requires good focus, improving the sound would probably serve them right.
02:01 PM fragalot: yeah, but i've not seen many handheld devices use an induction motor
02:01 PM FinboySlick: Well, nowadays there's dc brushless that could do very well.
02:02 PM fragalot: sure but who can afford a brand new brushless biax? :P
02:02 PM FinboySlick: fragalot: Want to start a business? ;)
02:02 PM fragalot: no.
02:02 PM gregcnc: universal motors?
02:02 PM fragalot: gregcnc: they use universal motors now
02:02 PM fragalot: they're just very noisy
02:02 PM gregcnc: due to gear reduction no doubt
02:03 PM fragalot: yup
02:03 PM fragalot: runs at a fairly high RPM
02:03 PM fragalot: also, the brush holder caps get VERY warm after a while
02:03 PM gregcnc: like most universal motors
02:03 PM fragalot: yeah it's nothing surprising
02:04 PM FinboySlick: Purely linear servo, no gearing, electronic stroke speed and length.
02:04 PM FinboySlick: scraping in luxury.
02:04 PM miss0r|office: but is it powerfull enough?
02:04 PM fragalot: that would need to be a beefy servo
02:04 PM CaptHindsight: pneumatic
02:04 PM miss0r|office: CaptHindsight: Already done
02:04 PM fragalot: CaptHindsight: they make a pneumatic model
02:04 PM fragalot: it's obscenely expensive :D
02:04 PM CaptHindsight: so stop complaining :)
02:05 PM fragalot: i'm not complaining
02:05 PM fragalot: i'm observing
02:05 PM miss0r|office: I think we still have the right to complain that we cannot afford the pneumatic one :D
02:05 PM fragalot: as an expert that now owns 2 biax scrapers
02:05 PM fragalot: >.>
02:05 PM miss0r|office: hey hey hey now... Don't get any "owners feelings there"
02:05 PM miss0r|office: :D
02:05 PM fragalot: my money, my biax!
02:05 PM CaptHindsight: no it's either complaining or whining (not specifically you)
02:05 PM fragalot: :D
02:06 PM fragalot: CaptHindsight: you never said we should stop whining.
02:06 PM CaptHindsight: in the USA if you make an observation about say a political agenda, they call it whining
02:06 PM gregcnc: are you guys scraping in the kitchen while the family is asleep?
02:06 PM fragalot: gregcnc: ...yes?
02:06 PM FinboySlick: Realistically though, given how beefy the universal motor + gears are, I'm not sure a linear servo would be that much worse.
02:07 PM CaptHindsight: I'll cut you some slack since you are in a saner country
02:07 PM fragalot: FinboySlick: the 'wobbler' that creates the motion in a biax is pure beef
02:07 PM FinboySlick: CaptHindsight: quit whining about the whining critique about political agenda :)
02:07 PM * FinboySlick goes full meta.
02:07 PM fragalot: if you've ever caught it on an edge,.. ooh boy that thing kicks
02:07 PM CaptHindsight: now you got it
02:08 PM CaptHindsight: IMTS is soon
02:08 PM CaptHindsight: whois going?
02:08 PM fragalot: I'm going to a EU equivalent
02:08 PM gregcnc: no experience scraping is this video not typical https://youtu.be/lY_vrwbCIn8?t=2m8s
02:08 PM fragalot: looking for a new machine
02:08 PM CaptHindsight: EUMTS?
02:09 PM gregcnc: I should have registered for IMTS
02:09 PM fragalot: gregcnc: that is a flaker
02:09 PM fragalot: the first half however.. yea
02:09 PM gregcnc: oops
02:09 PM CaptHindsight: methods_: boo
02:10 PM fragalot: gregcnc: read the first comment though :-)
02:11 PM fragalot: CaptHindsight: forgot the name, but it's similar.. just a lot smaller because of the geographic. :P
02:11 PM gregcnc: name of commenter?
02:11 PM fragalot: CaptHindsight: we're basically looking at different options to start poking the holes in our electrical cabinets ourselves
02:11 PM fragalot: gregcnc: video publisher
02:12 PM CaptHindsight: fragalot: I haven't read the backlog yet
02:12 PM CaptHindsight: so I am of no use (as always)
02:12 PM fragalot: :-)
02:13 PM CaptHindsight: fragalot: did the machine make it all the way to your door or just the depot
02:13 PM fragalot: it made it to my door, back to the depot
02:13 PM fragalot: and is coming back to my door again tomorrow
02:13 PM CaptHindsight: nice
02:14 PM gregcnc: knifemakerkinetic would be a fun visit, near milwaukee
02:14 PM fragalot: because apparently "CALL <phonenumber>" on the instruction sheet, and on the doorbell in a huge yellow postit, does not mean "call this number"
02:14 PM CaptHindsight: that is not really clear
02:14 PM Tom_L: shotgun sounds more fun for poking holes...
02:15 PM CaptHindsight: it requires reading
02:15 PM fragalot: CaptHindsight: the guy that shipped it paid extra for the "call prior to delivery" service too
02:15 PM Tom_L: a bit hard to control the size
02:15 PM CaptHindsight: fragalot: that won't stop them
02:15 PM fragalot: AND the customer rep added internal instructions to do so prior to leaving the depot again
02:15 PM fragalot: so.. eh.
02:15 PM gregcnc: that freight co is doing a wonderful job so far
02:15 PM fragalot: part of me is wondering if they'll have left it out in the rain to top it all off
02:16 PM MarcelineVQ: place your bets
02:16 PM miss0r|office: I *think* they did so, but it has already been taken by scrap merchants
02:16 PM CaptHindsight: "I've ben deliverin fer years, no paperwerks gonnah tell me how tah do meh job" (only in Hollandish)
02:17 PM fragalot: lol
02:17 PM fragalot: miss0r|office: keep that attitude up and i'm mounting an mk4 taper on your biax
02:17 PM gregcnc: ah i found a video pretty noisey
02:17 PM fragalot: gregcnc: they essentially sound like an angle grinder
02:17 PM fragalot: mainly because that's the exact same motor they used xD
02:18 PM miss0r|office: fragalot: Oh noes?! you wouldnt! :D
02:18 PM miss0r|office: Nothing good can come of MK4! :D
02:18 PM fragalot: miss0r|office: I'll need to talk to the boss to discuss pricing though
02:18 PM fragalot: and he's on holiday
02:19 PM fragalot: heh
02:19 PM fragalot: schenker just emailed me
02:19 PM fragalot: that the current status of the mill is "not delivered"
02:20 PM gregcnc: just in case you were wondering
02:20 PM fragalot: :D
02:20 PM fragalot: if you go to the tracking number
02:20 PM gloops: well, delivery may not be a binary thing
02:20 PM fragalot: it says "delivered" on the top right of the page
02:20 PM fragalot: and "not delivered" in the history log
02:20 PM fragalot: also, the estimated delivery date is the 23rd
02:21 PM fragalot: even though it's only departed their depot on the 27th
02:21 PM gloops: dates can go up as well as down
02:21 PM fragalot: ;D
02:22 PM miss0r|office: haha.. That *MUST* be the system they are using
02:22 PM Loetmichel: Tom_L: http://cyrom.dyndns.org/hajo/heatpipe_bent.jpg
02:22 PM Loetmichel: see the problem?
02:22 PM fragalot: miss0r|office: "tolerance of 5cm due to manual measuring of dates"
02:23 PM CaptHindsight: https://s22.postimg.cc/pdpqn30cx/ar00.jpg 7xxx aluminuminumnumnum
02:23 PM miss0r|office: fragalot: I had no idea schenker was based in china
02:23 PM Loetmichel: the CPU end was already soldered into the copper block so i had no room to use the bending tool (i do have one especially for those heatpipes)
02:24 PM Loetmichel: (main server is down, backup behind me has to do :-( )
02:28 PM fragalot: CaptHindsight: purdy
02:33 PM Tom_L: Loetmichel, i wonder if a spring around the outside would help
02:34 PM Loetmichel: Tom_L: not now... the second system i bent the pipes before soldering them into the cpu block... worked fine ;)
02:34 PM Tom_L: heh, ok
02:35 PM Loetmichel: we'll see when the aluminium blocks to press them on the heatsink in the back arrive... tomorrow... and in 40.5hours all 4 systems have to be at the customer 1200km away...
02:35 PM Loetmichel: fuuuun stuff ;)
02:36 PM MarcelineVQ: at least you're not forced to use fragalot's shipper :(
02:37 PM fragalot: ._
02:37 PM gregcnc: capthindsight F1?
02:40 PM Tom_L: damn, those itty bitty clouds are sure makin alot of noise
02:43 PM Deejay: gn8n
02:43 PM Loetmichel: MarcelineVQ: nope. boss will jump into his panamera some time tomorrow evening and drive the systems to vienna ;)
02:44 PM Loetmichel: and if the aluminium blocks arent there tomorrow at 10am or so i will simply mill them out of some stock i have laying around
02:44 PM XXCoder: clearly not a boeing job lol
02:45 PM Loetmichel: just dont like the cheap halfround 6mm mill bit i have, so i ordered some prefabricated ones
02:45 PM Loetmichel: nope, not boeing. but military as well ;)
02:45 PM CaptHindsight: gregcnc: yes, they do crazy anodize now
02:45 PM MarcelineVQ: aha that explains why he's driving there, can't trust military to actually pick up their shipments :>
02:46 PM XXCoder: yeah figured not boeing simply because boeing require stock to be tracable all way to source, as well as material certification that only lasts a year
02:47 PM miss0r|office: Loooong day tomorrow. Good luck with the mill, fragalot
02:47 PM * miss0r|office is out
02:47 PM fragalot: thx
02:48 PM Loetmichel: MarcelineVQ: nope... thursday 13:00 is deadline for the prototypes... 13:01 and the whole 120 systems order will be canceled.
02:48 PM Loetmichel: thats why he will take his private panamera and not the company merc ;)
02:50 PM gregcnc: remind him to bring his glasses
02:52 PM Loetmichel: gregcnc: will do ;)
03:55 PM gloops: wow, Boston people missed a free bridgie https://boston.craigslist.org/nwb/zip/6683082172.html
03:58 PM HexaCube: who the hell just gives away that kinda machine O_O
03:59 PM HexaCube: it does look kinda rusty though, not sure how bad that is, on the other hand
03:59 PM SpeedEvil: if you want it gone.
03:59 PM HexaCube: I bet it can be fixed
03:59 PM HexaCube: SpeedEvil: yes but even if it costs a little, there'll be plenty people taking it
03:59 PM HexaCube: as long as it's cheaper than "serious" offers :D
03:59 PM gloops: its sometimes like that, guy probably just bought the house and has a ton of plans and work to do on it
03:59 PM gloops: lets get all this crap out of the way first
03:59 PM SpeedEvil: It may cost money to have it there.
04:00 PM SpeedEvil: If you've got work to do.
04:00 PM HexaCube: the worst thing is, even if I ever found an offer like that I couldn't even fit that machine anywhere heh
04:00 PM HexaCube: I'd probably try to get it to good condition and sell it
04:01 PM gloops: would be nice just to spend time on it, doing it up
04:01 PM gloops: but then, hard to let go lol
04:02 PM gloops: we have seen them go for £250 on ebay here - UK though
04:02 PM HexaCube: really? D:
04:03 PM gloops: yeah, someone in here wanted it but couldnt drive - i doubted my van would survive the 700 mile round trip
04:03 PM HexaCube: phew, 700 miles, that's...
04:04 PM HexaCube: that's almost a trip across germany and back :P
04:04 PM gloops: the far end of the country lol
04:05 PM HexaCube: have you folks seen that tiny cnc lathe build on YT?
04:06 PM HexaCube: https://www.youtube.com/watch?v=vNyrYMU_EhI&t=30s
04:07 PM HexaCube: https://www.youtube.com/watch?v=JfMR7jDzDqk&t=46s that's a better video
04:09 PM gloops: nice machine - a lot of work though?
04:10 PM HexaCube: oh most likely, I think he pretty much built it from scratch
04:10 PM HexaCube: really cool build though, imo.
04:10 PM HexaCube: micro-machineshop I guess :P
04:11 PM gregcnc: the size is almost entirely impractical
04:11 PM gloops: https://www.ebay.co.uk/itm/G-Boley-6-5mm-Watchmakers-Lathe/142918936852?
04:13 PM HexaCube: well, depends on what you wanna make I guess :D
04:17 PM gloops: these things arent so bad if you have a machine shop to hand, theres some time and stress even with a small machine like that if you dont
04:19 PM gloops: a lot of my ideas for custom parts went out of the window pretty early when i realised how long the whole project was going to take
04:19 PM gloops: just buy the components
04:22 PM SpeedEvil: An actually benchtop CNC could have plusses.
04:22 PM SpeedEvil: yes, it's got huge limits
04:22 PM HexaCube: basically, I'd love small machines because it's a pain to have to wait for a chance at work to make a simple part
04:22 PM HexaCube: complex parts are doable at work and I don't mind having to wait to make them at work
04:22 PM HexaCube: with proper machines
04:29 PM gloops: main machine i used was a 100 year old lathe - which developed a crack in the top slide half way through building the router heh
05:10 PM gloops: https://www.telegraph.co.uk/news/2018/08/27/robot-designed-replace-migrant-strawberry-pickers-will-ready/
05:39 PM andypugh: Nothing like a bit of engraving to make something look serious is there? https://photos.app.goo.gl/jrnw5M3ALa6XsTB56
05:40 PM _unreal_: sweet!!!!!!!
05:40 PM andypugh: It’s a mount for a high-speed spindle for my milling machine. https://photos.app.goo.gl/zgFpSrPYETRjrt2Q6
05:40 PM andypugh: I made two, so they can enfrave each other. :-)
05:40 PM _unreal_: my tinker board and lcd and other stuff showed up.... I can start putting S#!t together
05:40 PM _unreal_: for my cnc
05:44 PM andypugh: PC restart (updating OS)
06:33 PM Tom_L: andypugh nothing like having spare parts..
06:46 PM Tom_L: is that an air cooled spindle?
06:48 PM CaptHindsight: andypugh: I've been seeing those spindles on ebay lately, how are they?
06:50 PM andypugh: So far it seems OK. But engraving isn’t really pushing it.
06:50 PM Tom_L: ER20?
06:51 PM andypugh: Yes. The only size of collet I didn’t alrady have a set of :-)
06:51 PM Tom_L: heh
06:52 PM CaptHindsight: andypugh: interested when you try it at lower speeds say <1k rpm
06:53 PM Tom_L: probably no good for tapping
06:53 PM CaptHindsight: many torques or many many torques
06:53 PM andypugh: I wouldn’t use it at 1k rpm. that milling machine already has a 3hp 1k spindle.
06:53 PM CaptHindsight: so gutless <4k rpm?
06:54 PM andypugh: I would expect so.
06:54 PM andypugh: Tops out at 24k
06:54 PM CaptHindsight: so not for milling steel
06:55 PM andypugh: Maybe with very small cutters.
07:21 PM Loetmichel: define small... i sometimes whish my spindle coudl do 80k
07:22 PM Loetmichel: milling steel with an 0.6mm two flute at 24krpm takes ages...
07:22 PM andypugh: Yes, I would typically avoid that :-)
08:50 PM -!- #linuxcnc mode set to +v by ChanServ
10:19 PM Tom_L: JT-Shop, your main page seems broke
10:20 PM Tom_L: 406 An appropriate representation of the requested resource / could not be found on this server.