#linuxcnc Logs

Nov 11 2019

#linuxcnc Calendar

01:36 AM Deejay: moin
01:42 AM elmo40: almost 3am?? i need to get to bed.
01:44 AM XXCoder: https://www.aliexpress.com/item/32868934735.html
01:44 AM XXCoder: cheeap
01:45 AM XXCoder: but no way it can be certificated lol
02:27 AM SpeedEvil: Well, easy enough to verify
02:31 AM XXCoder: probably but then its meteric
02:31 AM sensille: can not deliver to germany :(
02:31 AM XXCoder: yeah germany is very much "good luck" country
02:35 AM XXCoder: https://www.aliexpress.com/item/32850389977.html? HMM
02:36 AM XXCoder: not on sale
02:37 AM XXCoder: found cheaper one
02:39 AM XXCoder: https://www.aliexpress.com/item/32954937934.html
02:41 AM sensille: 27 euro with shipping to germnay
02:41 AM XXCoder: 70 usd, shipped for me lol
02:41 AM sensille: that dial gauge
02:42 AM XXCoder: oh lol
02:42 AM sensille: isn't today special sales day on AE/
02:42 AM XXCoder: dial gage isnt best one I could find
02:42 AM XXCoder: yep 11.11
02:42 AM XXCoder: tempted woith laser one but no way to safely run it here :(
02:43 AM sensille: i want calipers to measure hole center distances
02:43 AM XXCoder: you mnean rad?
02:45 AM sensille: https://www.aliexpress.com/item/32859812073.html
02:45 AM sensille: but cheaper :)
02:47 AM XXCoder: ah hole to hole centers
02:47 AM XXCoder: interesting, never seen such thing
02:50 AM sensille: nothing interesting enough in my cart to rush ordering today
05:12 AM Tom_L: morning
05:13 AM Tom_L: 31°F, Lo 14 and windy as heck
05:14 AM XXCoder: 52f 44f cloudy as heck
05:14 AM XXCoder: tues might be heavy rain
07:55 AM terr_: I have not been here before. I am buying a pi. I have a few arduinos. The pi comes with a variant I am not familiar with and I have no idea what its real time capably is. What is a big unknown for me is how to read the GPIO inputs.
08:11 AM elmo40: XXCoder, why can it not be certified?
08:11 AM XXCoder: im pretty sure its not very repeatable
08:11 AM elmo40: if it is repeatable then it will pass any cert.
08:11 AM XXCoder: its fine for home
08:11 AM elmo40: ;-)
08:55 AM elmo40: lovely ice-snow mix this morning.
08:55 AM elmo40: wife has been wanting me to get her winter tires on for weeks... i told her to go to Costco. :-P
09:17 AM Loetmichel: hmm, does anyone have a source for an m4 "grub screw" 70mm long with both ends 20mm thread and hardened? Cowork ripped off the last draw pin of the blind rivet nut setting tool. at ~30€ each thats getting expensive...
09:49 AM SpeedEvil: Do you mean the middle is not threaded?
09:49 AM Loetmichel: yes
09:50 AM Loetmichel: https://werkzeugfee.de/Zugdorn-M4-x-07-fuer-MASTERFIX-MFX-612-Nietmutternratsche-Nietmuttern-zange <- these pins rip off where the thread ends.
09:50 AM Loetmichel: soft as mild steel
09:51 AM Loetmichel: i thought to drill out the thick body, cut a thread in it and screw in a hardened bolt with both sides threaded
09:51 AM SpeedEvil: I was going to suggest get some m4 threaded 8.8 rod, and put a sleeve on it
09:51 AM SpeedEvil: But my vendor only seems to do mild
09:52 AM SpeedEvil: (at 4mm)
09:53 AM Loetmichel: it has to slide inside the "nozzle" of the tool
09:53 AM Loetmichel: so it has to be not threaded in the middle part
09:53 AM Loetmichel: or it would grab on the nozzle of the tool
09:54 AM Loetmichel: https://www.ebay.de/i/222552389509 <- thats the tool btw
09:54 AM SpeedEvil: And the other vendor of '8'8' M4 threaded rod I can find has also brass threaded 8.8 rod, which does not inspire confidence.
09:54 AM Loetmichel: indeed :-')
09:54 AM Loetmichel: an i would think 12.9 would be minimum here anyways
09:55 AM Loetmichel: considering how frequent those draw pins break off ;)
09:55 AM SpeedEvil: Grease the handle?
09:55 AM Loetmichel: how would that help?
09:56 AM Loetmichel: they break because you cant feel the "end point" of the rivet
09:56 AM SpeedEvil: So coworkers can't grip it so hard.
09:56 AM SpeedEvil: ah
09:56 AM Loetmichel: to much mechanical advantage in the thread
09:59 AM methods_: set up a torque wrench head on it
10:00 AM Loetmichel: easier way would be to convince the boss to shell out the ~1500 eur for a air powered rivet nut gun
10:01 AM methods_: hehe that would work too
10:01 AM Loetmichel: but its more probable that hell freezes over
10:01 AM gregcnc: but that's 50 new bolts, employees will never use that many.....
10:02 AM Loetmichel: indeed
10:03 AM gregcnc: penny wise, pound stupid? or something
10:19 AM Loetmichel: yes
11:34 AM drdoc: Loetmichel: did you try looking for M4 stud screws?
11:36 AM drdoc: or, single-setting torque wrenches are relatively cheap - the prce of 2 draw screws
11:36 AM drdoc: ah, I see methods_ already went there
11:40 AM terr_: Loetmichel, 4140. Thread it and case harden it. Pretty easy.
11:42 AM Loetmichel: terr_: no tools for that at the company
11:42 AM Loetmichel: and i wouldnt take even more of my home shop there, already half the tools at work are my private stuff
11:42 AM Loetmichel: including the "lathe" ;)
11:43 AM gregcnc: how much does the boss pay for tool rental?
11:43 AM terr_: You can buy a die. I found some for T8
11:43 AM terr_: Easier to find teeth on a chicken.
11:43 AM Loetmichel: gregcnc: nothing
11:44 AM Loetmichel: die?
11:44 AM terr_: I found taps at T3.5. Amazon. You need a Die. Buy both.
11:44 AM Loetmichel: you mean for cutting M4?
11:44 AM Loetmichel: thats easy
11:44 AM Loetmichel: i am in germany
11:45 AM Loetmichel: ALL the dies/taps are metric here ;)
11:45 AM Loetmichel: i meant i have no stuff to case harden tool steel at the company
11:45 AM terr_: Yes. Cuttong M4 in 4140 is easy. Its RC13. Hardens to like RC52
11:45 AM Loetmichel: not even a propane torch
11:45 AM naftilos76: Hi everyone, i am working on some ruby code with a grbl based 3018pro cnc from aliexpress and i was wondering why everytime i send a command to the grbl i receive two oks instead of one => "ok\r\nok\r\n".
11:46 AM terr_: Yoj need a trough of oil and an oven you can stiff the shaft into and it needs tk be like +350-450C for like an hour
11:48 AM terr_: Hey... I can tell. I am home. I found my friends. And I wrote a peom on this about 30 years ago. Lll
11:48 AM terr_: Why Ruby? I am planning on c
11:49 AM naftilos76: terr_: no reason, just thought it would be easier...
11:49 AM naftilos76: i do not really need speed so ruby is easier
11:52 AM terr_: Well I know C and I don't know Ruby
11:55 AM terr_: I just picked up some arduinos. Have an order in for Raspberry pi. I have 4 on order with 4GB and 4USB and only 2HDMI
12:04 PM drdoc: terr_: 4140 hardens better in brine
12:08 PM terr_: Last time I did this was so long ago I forget. I am just getting back to my passion. He should be able to aneal, thread and temper the shaft
12:09 PM Loetmichel: nah, not the original shaft
12:09 PM gregcnc: you are talking 70mm long M4 shaft
12:09 PM Loetmichel: thats some "mild steel" if even that
12:10 PM terr_: Mild steel? Like 1018. Easy to work with.
12:10 PM Loetmichel: gregcnc: actually: a 70mm long shaft with both sides threaded 20mm
12:10 PM Loetmichel: ideally
12:10 PM Loetmichel: terr_: IF that
12:10 PM gregcnc: Ø4mm
12:10 PM Loetmichel: it feels like chewing gum if you try to put the thing on the lathe
12:10 PM Loetmichel: the ripped off original draw pin i mean
12:10 PM terr_: You just need an M4 die. How many starts? One (1)?
12:11 PM Loetmichel: IDEALLY i need a new setting tool, preferably air or battery powered
12:11 PM gregcnc: let the boss solve this problem. For 30Euro for a new rod or just pony up for a better tool
12:12 PM terr_: I don't know what a setti g tool is
12:12 PM Loetmichel: so our "farm mechanics" here that do everything with either not enough or to much force cant damage it
12:13 PM terr_: I grew up on a farm. Too little force meant the livestock won.
12:13 PM Loetmichel: terr_: that pin sits in this device (for setting blind rivet nuts): https://www.ebay.de/i/222552389509
12:13 PM terr_: You need a lath. I know where one is and I can't yet use it.
12:14 PM Loetmichel: terr_: i meant: the workers here cant dosage their force very well
12:15 PM terr_: You must be German.
12:16 PM Loetmichel: i am ;)
12:16 PM terr_: Ha! Lol
12:16 PM Loetmichel: why?
12:16 PM terr_: You used the term dosage
12:16 PM Loetmichel: what would have been a better term here?
12:16 PM terr_: We would say meter
12:17 PM Loetmichel: okay, noted
12:18 PM terr_: Dosage is more Eastern European... as in the KidofSpeed used a dosage meter as she road her bike through Chernobyl
12:19 PM gregcnc: is dosage meter redundant in that case?
12:19 PM Loetmichel: terr_: in german its "Kraft dosieren" if you want to say that they can apply the right amount of force
12:19 PM Loetmichel: hence my error
12:19 PM terr_: Na. Dosage is fine. Alm ise meant iz thd farm boy mechanics wouls hog diwn on the wrench and twist off the shaft and they woukd be shafted before they start.
12:21 PM terr_: My good friend Dieter is German. Now I will be able to impress him. I czn already drink more Getman beers
12:21 PM terr_: She was sexy enough to glow I think.
12:22 PM Loetmichel: ?
12:22 PM terr_: Okay. My mind wanders. Back to your shaft
12:23 PM terr_: Greg figured Chernobyl was hot enough that she wasnt meant to be long on this planet
12:24 PM terr_: You need to be able to thread it. Lathe and a die. Temper if need be
12:24 PM Loetmichel: my "lathe" is a bit small though...
12:24 PM gregcnc: https://www.instagram.com/p/B34Uo2Jp61o/
12:24 PM Loetmichel: https://www.youtube.com/watch?v=7J40p8dMZZk&t=107s
12:24 PM Loetmichel: ... and no, i have no oversized hands ;)
12:45 PM Tom_L: terr_, Pi3 may not be suitable for realtime, Pi4 might be
12:45 PM Tom_L: andypugh is working on GPIO for it
12:46 PM jymmmm: hola
12:47 PM Tom_L: jymmmm, stayin warm?
12:47 PM Tom_L: 23°F here and dropping
12:47 PM Tom_L: Lo 14
12:48 PM * jthornton goes to check the fires in the shops
12:48 PM Tom_L: gawd it was windy last night
12:48 PM Tom_L: jthornton, i see you made it back
12:48 PM jthornton: windy on the way home too
12:48 PM Tom_L: bent road signs windy
12:48 PM jthornton: damn that's Kansas winds
12:49 PM jymmmm: Tom_L Suprisingly yes, outside in a tshirt 62F
12:49 PM Tom_L: the leaves were beating against the house... i thought it was hail
12:50 PM Loetmichel: Tom_L: bent road signs windy? did you have 500mph winds? or are your road signs built like your stick frame houses?
12:50 PM jymmmm: Tom_L I thought it was rain here
12:50 PM Tom_L: Loetmichel we've been known for wind for some time here
12:51 PM Tom_L: one time i recall 70mph straight line winds bending interstate signs over like a twig
12:51 PM Loetmichel: no, i meant: in germany road signs have at least a 2,5" steel pipe with 1/4" walls and are about 3 feet deep in the earth with concrete.
12:51 PM Loetmichel: they DONT bend because of wind
12:52 PM Tom_L: i'm talking about the kind that have I beam supports
12:52 PM Loetmichel: i have seen some getting hit by a car and the car was totalled and the sign still upright ;)
12:52 PM Loetmichel: ah, the highway signs
12:52 PM Loetmichel: i see
12:53 PM Loetmichel: these are pretty substantial here, too
12:53 PM Loetmichel: still my question stands: weak signs hor REALLY high winds?
12:55 PM Tom_L: high wind
01:02 PM jymmmm: Just freaky weather anymore
01:05 PM gloops: think theyre designed to snap or collapse on impact here, in case a car hits them
01:05 PM Loetmichel: gloops: not so much here
01:09 PM CaptHindsight: gregcnc: https://www.ebay.com/itm/1981-MATSUURA-MC-500V-CNC-with-YASNAC-3000G-control/283531831618 lotsa machine for someone local
01:21 PM Tom_L: most of the road signs here now have wood posts with holes drilled near the base to break away
01:21 PM Tom_L: except the larger interstate signs
01:21 PM jymmmm: No more wood here
01:22 PM jymmmm: All burnt up last year
01:22 PM Tom_L: even the smaller metal posts are made to snap at the base
01:23 PM jymmmm: MADE to snap???
01:24 PM Tom_L: they drive a post in and leave it about 6" above grade and bold another piece to that. the bolts will shear
01:26 PM jymmmm: oh
01:27 PM jymmmm: Here, it's a like a 3" square pipe in the ground wiht 6" above grade, then a 2" square pole sits inside and is bolted together.
01:28 PM Tom_L: https://safety.fhwa.dot.gov/local_rural/training/fhwasa09025/#c4
02:00 PM Connor: So, I have to figure out how to get this script.. https://github.com/bjj/2x_laser working on our new laser cutter running Mesa card. The old script uses parport with PWM. I'm not sure how that translates to the Mesa card...
02:12 PM skunkworks: Connor: I don't think it does. Although I think there was someone that had gotten something similar working with mesa - check the mailing list
02:15 PM skunkworks: Connor: I think related to https://github.com/LinuxCNC/linuxcnc/pull/630
02:15 PM Connor: I saw PCW made a custom bit file for mesa that turns the 4th step/dir into a pwm generator...
02:15 PM Connor: wonder if he could do the same for the 7i76e card...
02:21 PM hazzy-m: CaptHindsight: are you planning to go to FABTECH?
02:22 PM skunkworks: Connor: I would think so...
02:23 PM CaptHindsight: hazzy-m: likely Wednesday, if not then Thursday
02:23 PM Connor: Probably be the easiest path forward instead of trying to rewrite all the code to work with the analog out...
02:23 PM CaptHindsight: hazzy-m: how is the show today?
02:24 PM CaptHindsight: this weather we are having is not common this early in the year
02:25 PM CaptHindsight: 7f (-13C) tonight out here
02:25 PM hazzy-m: Very good! Machines running well after we got them to turn on all three phases. Good turnout as well
02:25 PM hazzy-m: Yeah, I thought it would be slow today because of the snow
02:26 PM CaptHindsight: now they are saying 4F
02:26 PM pcw_home: Conner: I think 7i76e_7i76x1pD.bit is what you want
02:26 PM CaptHindsight: hazzy-m: plus lots of people locked into flights and hotels
02:26 PM Connor: pcw_home: I was just emailing you...
02:27 PM CaptHindsight: hazzy-m: I'll definitely stop by the booth
02:27 PM skunkworks: Connor: I think there was even some examples in the push
02:34 PM Connor: If the 7i76e_7i76x1pD.bit coverts the 4th axis into a pwm gen, I think I can use that with the existing code.
02:45 PM skunkworks: Connor: I think though.. This is for rastering?
02:45 PM Connor: Yup.
02:45 PM skunkworks: that you are limited to the amount of data you can pass as the servo 1ms thread
02:45 PM skunkworks: the printer port used the base thread for that
02:45 PM Connor: Crap.
02:46 PM skunkworks: So - I think that pin was added to be able to stream the data to the mesa card - then the mesa card would use it. But I am not 100% up on that
02:47 PM Connor: Stream?
02:48 PM skunkworks: Probably using the wrong term
02:48 PM Connor: Well.. I saw that in the code too..
02:48 PM Connor: I just wasn't sure what it was..
02:49 PM W1N9Zr0: when we upgraded the hacklab laser to mesa, we just bumped the servo thread to 0.1ms
02:51 PM skunkworks: Probaly can't run that fast with ethernet.
02:51 PM W1N9Zr0: aah, that's true, we're using the pci card
02:51 PM skunkworks: right
02:51 PM skunkworks: 2-4khz maybe
02:51 PM skunkworks: depending on the computer
02:52 PM Connor: What affect does the base vs servo period have on the pwm and the raster stuff?
02:53 PM Connor: and, maybe I just use one of the pins from the onboard parport for this...
02:54 PM skunkworks: No no no! you need to try the new pin!
02:54 PM skunkworks: ;)
02:55 PM skunkworks: but - yes - using a high speed base thread probably would be the easy fix
02:56 PM Connor: It's a older core 2 duo machine.. I've not payed too much attention to the base or servo thread settings.. No idea what it can handle.
02:57 PM skunkworks: uh - you would need to be running rt_preempt. Hardware really effects how fast you can run the base thread..
02:57 PM Connor: Yea.. I'm running rt_preempt because of the 7i76e. :) Which is why I didn't pay much attention to it..
02:58 PM skunkworks: I have 8200/8300 hp's that will do a 40khz... i5 but that is been an exception not the norm.
02:58 PM skunkworks: with rt_preempt
03:00 PM pcw_home: Yeah in general you will not be able to get to even 4 KHz with Ethernet, a better solution is a buffered data stream that's synchronized with position
03:01 PM pcw_home: and a 1 KHz or so servo thread
03:01 PM Connor: That's kinda outside of my knowledge base too.
03:02 PM Connor: using the parport pin is sounding more and more like the plan..
03:11 PM Tom_L: CaptHindsight, plane slid off the runway o'hare a while ago
03:12 PM Tom_L: that should add to some more delays
03:13 PM CaptHindsight: happens here often, first snow....some roads were just parking lots earlier today. had to take backroads to get around
03:15 PM CaptHindsight: "Chicago OHare International Airport, Chicago, IL (ORD). This is causing some arriving flights to be delayed an average of 6 hours and 1 minute"
03:16 PM CaptHindsight: the plow finally arrives here
03:16 PM CaptHindsight: after shoveling 3 times
03:19 PM Connor: Hmm.. https://github.com/bjj/2x_laser/blob/5i25/2x_Laser.hal 5i25 version
03:20 PM terr__: test
03:20 PM terr__: cell is charging
03:21 PM JT-Shop2: wintery mix falling now
03:22 PM terr__: I have looked at some linear actuators based on a ball screw. OPEN BUiLDS uses whaat looks to be some crappy plastic nuts.. (comments please) Are there nylatron bushings for an SBR16 rod system? They should be real cheap and work well.
03:22 PM Connor: Hmm.. that version uses BASE_PERIOD = 27000
03:22 PM Connor: SERVO_PERIOD = 1000000
03:22 PM Connor: so, it might work with the 7i76e
03:23 PM terr__: JT-Shop2, I still say Al GOre promised no snow. I was goign to move to Gilligan's island. (Land of OZS of course)
03:24 PM pcw_home: You cannot use a base thread with the Ethernet cards
03:25 PM skunkworks: wait - why can't you run the base thread with ethernet cards?
03:25 PM CaptHindsight: Connor: whatcha building? laser system? the timing shown are with that specific hardware and the base thread time is driven by the PC vs the Mesa hardware
03:26 PM Connor: Crap.. https://github.com/bjj/2x_laser/commit/324e598f9a3652a154ae5cb0f9af715781b61894
03:26 PM CaptHindsight: terr__: have a pic of the nuts?
03:26 PM Connor: CaptHindsight: Yea.. converting a Chinese 100W to LinuxCNC & Mesa
03:27 PM Connor: pcw_home: Looks like it doesn't use the base thread.. but, the comments on the code isn't exactly inspiring as to it working..
03:28 PM CaptHindsight: oh the config shows a Mesa card and a LPT port
03:28 PM CaptHindsight: which I have done often
03:28 PM Connor: That's my fall back.. ordered a parport.. I thought the mobo had one.. it doesn't..
03:28 PM Connor: so, I may be mixing..
03:29 PM CaptHindsight: ok , the LPT stuff in the config is commented out, so not used
03:30 PM CaptHindsight: Connor: not enough IO on the Mesa card?
03:30 PM Connor: Right.. I would use https://github.com/bjj/2x_laser for just the parport stuff related to fire control.. and use my existing mesa config for everything else.
03:30 PM W1N9Zr0: you can still do raster on the slow servo thread, the period just determines how fast laser can move and still turn on/off in time
03:31 PM Connor: No. issue issue is with the pwm being generated in the base thread or servo thread. servo if use mesa hardware, base if software with the parport..
03:34 PM CaptHindsight: Connor: what IO board are you using with the xi25 FPGA board?
03:35 PM CaptHindsight: actually, what hardware are you currently using just to be clear
03:36 PM terr__: Is the GPIO interface on a Raspberry pi a glorified parralel interface?
03:36 PM terr__: s/parralel/parallel/
03:36 PM skunkworks: terr__: yes..
03:37 PM skunkworks: without reset
03:37 PM terr__: skunkworks, what of the old parallel port control pins?
03:38 PM CaptHindsight: Connor: so you want to use https://github.com/bjj/2x_laser to run a 7i76e?
03:38 PM terr__: So I should be able to just plug in any old printer and pooff magic it work work!
03:38 PM Connor: G.Weike LC1390 with 7i76e hardware
03:38 PM Connor: yes.
03:39 PM Connor: He has https://github.com/bjj/2x_laser/tree/5i25 for 5i25, but, it's clear that raster doesn't work in it.
03:39 PM Connor: I didn't realize how raster was implemented.
03:40 PM Connor: I think raster with g-code would be better.. I dunno.
03:41 PM SpeedEvil is now known as Guest70970
03:42 PM XXCoder: dangerous. https://www.youtube.com/watch?v=JyA1lBJl_qM
03:42 PM CaptHindsight: yeah you need to convert that hal file to use the 7i76, so servo thread is now used and all the new pinouts
03:43 PM XXCoder: stupid dangerous lol
03:43 PM Connor: CaptHindsight: But, per this.. https://github.com/bjj/2x_laser/commit/324e598f9a3652a154ae5cb0f9af715781b61894 Vector works, but rastering is disabled..
03:47 PM CaptHindsight: he never fixed rastering
03:47 PM CaptHindsight: so it's you job :)
03:47 PM CaptHindsight: you/your
03:48 PM CaptHindsight: heh, I did similar with galvos and 7i77
03:49 PM Connor: which I can't do unless move from 7i76e to 5i25+7i76 combo
03:49 PM W1N9Zr0: i think the same config runs fine at 10in/s with 1ms servo thread
03:49 PM W1N9Zr0: it just depends on how fast you want to engrave, and how much jitter is acceptible
03:49 PM CaptHindsight: pcw_home: what is the bandwidth of DAC's on the 7i77?
03:51 PM CaptHindsight: Connor: I guess there is your answer :\
03:51 PM CaptHindsight: ethernet has its limits
03:55 PM * JT-Shop calls it a day outside... getting too much wintery mix falling now
03:56 PM CaptHindsight: quitter :)
03:56 PM CaptHindsight: have to go drive in the mess here
03:56 PM CaptHindsight: avg 45mph on the backroads, 10mph on the main roads
03:57 PM pcw_home: CaptHindsight about 2 KHz
03:57 PM CaptHindsight: if only people would stay home or car pool on these days
03:57 PM CaptHindsight: I need to write that down
03:57 PM CaptHindsight: I recall that it was faster than the analog galvos
03:58 PM pcw_home: XY2-100 would probably be better if XY2-100 Galvos are available and similar prices
03:59 PM sync: they are not terribly expensive tho
03:59 PM sync: the chinese ones seem to be o
03:59 PM sync: kk
04:00 PM pcw_home: Yeah I guess I need to be resigned to getting one to test the firmware
04:01 PM CaptHindsight: I'll have more time to test soon
04:01 PM pcw_home: (with a laser pointer)
04:01 PM CaptHindsight: been using 4K projectors lately for exposures
04:01 PM CaptHindsight: the Chinese laser engraver/cutter galvos are nearly all XY2-100
04:02 PM CaptHindsight: the Chinese light show galvos are mostly analog
04:02 PM pcw_home: Yeah looks like the XY2-100 galvanometers are more used for cutting/marking/sintering
04:04 PM Connor: https://forum.linuxcnc.org/plasma-laser/33058-laser-raster-engraving?start=10
04:04 PM Connor: Hmm.. so, this has been discussed before..
04:04 PM CaptHindsight: the galvos out of Cambridge or nutfield are setup anyway you wish
04:05 PM terr__: CaptHindsight, I have the link for the lead screw nuts. three (3) options from Openbuilds. All look inadequate to me. https://openbuildspartstore.com/search.php?search_query=8mm%20acme%20nut&section=product
04:05 PM terr__: Problems with the browser. Normal. Nothing works right. I _should_ be able to file a web page and of course they never thought of that. I can of course download it nut not all comes in and I can book mark it but they didn't figure out how to even handle bookmarks properly. Last I looked they don't know how to handle malloc() either.
04:06 PM CaptHindsight: i have to work on large volume laser bed
04:06 PM CaptHindsight: terr__: what are you trying to build?
04:07 PM CaptHindsight: metric 8mm lead screws and polymer nuts
04:09 PM CaptHindsight: terr__: openbuilds has low cost automation parts for hobbyists where precision and durability are not on top of your list
04:09 PM terr__: CaptHindsight, ya. But they don't say this!
04:09 PM CaptHindsight: terr__: https://www.machinedesign.com/motion-control/choosing-best-lead-screw-linear-motion-application
04:10 PM CaptHindsight: buyer beware
04:10 PM terr__: Frankly it looks like expensive junk in many respects. Not stiff and those nut drivers for 8mm 4 start will NOT stand up.
04:10 PM CaptHindsight: https://www.daycounter.com/Calculators/Lead-Screw-Force-Torque-Calculator.phtml
04:10 PM CaptHindsight: https://www.amesweb.info/Screws/LeadScrewCalculationsAcmeThreads.aspx
04:11 PM CaptHindsight: https://www.sdp-si.com/D810/PDFS/Ball%20And%20Acme%20Lead%20Screw%20Technical%20Info.pdf
04:11 PM CaptHindsight: terr__: what is the application? load, speed, torque, precision, durability required etc etc
04:12 PM CaptHindsight: terr__: for fun go to #reprap and say that
04:12 PM CaptHindsight: or not
04:13 PM CaptHindsight: https://www.linearmotiontips.com/how-do-i-calculate-the-pv-value-for-a-lead-screw-application/
04:13 PM terr__: I start with pushing wood (2x4s) through a table saw. I mount a dado blade. When I get this running I soup it up and I'll need to hog out 6x 7/8th inch wide by 7/8 inch deep dados and I'll need over 5HP to do this... to spin the blades.
04:13 PM CaptHindsight: and if you get a chance, what these 40 videos https://www.youtube.com/playlist?list=PL3D4EECEFAA99D9BE
04:14 PM CaptHindsight: what/watch
04:14 PM terr__: ho are the #reprap people?
04:14 PM terr__: s/ho/who/
04:15 PM Rab: eBay LogoeBay Logo
04:15 PM Rab:
04:15 PM Rab:
04:15 PM CaptHindsight: #reprap are the ones that swear by the openbuilds parts for their hobby toys
04:15 PM Rab: oops
04:17 PM CaptHindsight: terr__: yes 8mm screws don't sound big enough for your application
04:17 PM CaptHindsight: terr__: how long are the 2x4's?
04:18 PM CaptHindsight: http://www.fao.org/3/XII/0886-A2.htm
04:19 PM CaptHindsight: http://www.diva-portal.org/smash/get/diva2:991222/FULLTEXT01.pdf
04:19 PM Rab: Sounds like gearmotor + chain drive might be better for the application.
04:20 PM terr__: 20 inches and less.
04:20 PM CaptHindsight: https://bioresources.cnr.ncsu.edu/resources/a-predictive-model-for-the-cutting-force-in-wood-machining-developed-using-mechanical-properties/
04:20 PM terr__: hmmm. I never even THOUGHT of that!!!
04:21 PM terr__: I don't even own a lead screw yet. I am just starting out and I'm looking at stuff and thinkinbg these are toys.
04:21 PM CaptHindsight: https://bioresources.cnr.ncsu.edu//BioRes_06/BioRes_06_4_3687_Porankiewicz_AGM_Main_Norm_Cut_Forces_Wood_1402.pdf
04:22 PM CaptHindsight: terr__: you have to start somewhere
04:22 PM skunkworks: terr__: well - no.. It isn't a printer port - just i/o that could be used for a printer port I guess
04:22 PM CaptHindsight: cheap parts to play and learn
04:22 PM terr__: yup. So I bought a couple NEMA 23 motors and enough to make them turn.
04:22 PM CaptHindsight: https://link.springer.com/article/10.1007/s00226-013-0551-x
04:23 PM Rab: terr__, if you're in the US and on a commercial budget, try Misumi: https://us.misumi-ec.com/
04:23 PM CaptHindsight: figure out your cutting forces based on the feed rates you'd like to obtain vs cost
04:23 PM terr__: I might use it as a printer port. Be pretty interesting. Linux on a Raspberry pi running 4 GB ram and driving USB3 and an old printer... call it a print server on steriods.
04:24 PM Rab: Otherwise, a cheap eBay ballscrew will leave you a lot better off than any of the OpenBuilds stuff.
04:24 PM CaptHindsight: then run the numbers
04:25 PM CaptHindsight: used gearmotor and chain setup will be cheap
04:25 PM CaptHindsight: you don't need much precision since it's wood
04:25 PM terr__: Rab, I am in Canada in Calgary... pollies are talking about joining the US. We have lots of oil. :-) and our southern friends think they are just fine. :-) I can import. I am not ona commercial budget right now... but maybe I will be shortly
04:25 PM CaptHindsight: you will have to decide on your feed rates vs cost and the type of spindle you have
04:25 PM Rab: Maybe even a garage door opener, although you'd probably need some reduction.
04:26 PM terr__: YA... where do I find a chain drive. Best I found was a bicycle shop
04:26 PM terr__: LOL
04:27 PM CaptHindsight: https://www.sdp-si.com/products/Timing-Belts-and-Cables/index-2018.php
04:28 PM CaptHindsight: https://www.amazon.com/Mechanical-Roller-Chain-Sprockets/b?ie=UTF8&node=16411641
04:28 PM Rab: terr__, take a look at DIY plasma cutters for some motion control ideas. Plasma cutter doesn't need super high precision, but it does need to be rugged.
04:29 PM Rab: People use chain drives, belts, all sorts of stuff.
04:30 PM _unreal_: sup
04:30 PM _unreal_: So I got my board cut down and strips cut etc...
04:32 PM _unreal_: At this point I need to glue the "strip" stiffeners onto the bottom and drill holes to mount the rail
04:33 PM _unreal_: So the rail I have is 1.5"x3" extrusion. I dont have any details on it because they where a dumpster find. I'm trying to figure out what Nut I need for them
04:37 PM terr__: Rab, I could not find a suitable chain drive. Closest I came was a bicycle chain. What do people use? And right now I need cheap to learn from. Once I get cheap working then I get serious.
04:38 PM terr__: _unreal_, I doubt this helps but I think 3M makes the glue you need and Boeing buys it for their airplanes
04:44 PM _unreal_: glue?
04:44 PM _unreal_: heh
04:45 PM _unreal_: terr__, i need "wood" glue
04:45 PM _unreal_: heh
04:46 PM _unreal_: My base is plywood
04:46 PM _unreal_: My rail system is supported by aluminum extrusion. or it will be
04:46 PM _unreal_: when its finished
04:47 PM terr__: what are you gluing to?
04:48 PM terr__: Only decent glue that I know of to join aluminum to plywood is contact cement
04:48 PM terr__: for plywood to plywood... titebond II. Not III. the III people typically don't even know what its for.
04:52 PM CaptHindsight: terr__: 2 links above for chain and sprockets ^^
04:53 PM CaptHindsight: https://www.bbman.com/roller-chain-sprockets/
04:53 PM terr__: CaptHindsight, I have been thinking... the 8mm lead screw should work. One does not push wood through a blade. One feeds it. The blade has to do the work. I can feed into a dado with less than 170 in.oz which should be about 2000 N.cm... IE not much force should be required.
04:53 PM CaptHindsight: http://www.tsubaki.ca/products/sprockets
04:53 PM CaptHindsight: https://www.fastenal.ca/counterBook/Power%2BTransmission/Chain%2Band%2BSprockets/Sprockets/609412
04:54 PM CaptHindsight: https://www.motioncanada.ca/brand/00540/Martin%20Sprocket%20&%20Gear/en
04:55 PM terr__: I have talked to Transmission supply here in Calgary. THey can order. I think I need to tell them what to order because maybe they rely on an engineer to do the design work.
04:56 PM terr__: Tsubaki products look like bicycle chain. I don't know if I can get accuracy.
04:57 PM terr__: that looks like big heavy stuff. I would want that if I'm cutting a log... and I may well be doing this one day.
04:58 PM CaptHindsight: https://www.surpluscenter.com/Power-Transmission/Roller-Chain-Links/
04:58 PM CaptHindsight: https://www.surpluscenter.com/Power-Transmission/Sprockets/
04:59 PM CaptHindsight: https://www.surpluscenter.com/Electric-Motors/AC-Gearmotors/
04:59 PM CaptHindsight: https://www.surpluscenter.com/Electric-Motors/DC-Gearmotors/
04:59 PM CaptHindsight: https://www.surpluscenter.com/Power-Transmission/Gear-Reducers-Gearboxes/
05:00 PM CaptHindsight: chains don't stretch much if the load is in design range
05:02 PM terr__: I don't expect loads of more than say 10 pounds. 170 in.oz = 14 ft.oz and this is under a pound. With a 4 start T8 it should be about 170/16 so say about 10 pounds load pre revolution (probably not done right) so it should easily be okay... even with 4 starts... right?
05:02 PM terr__: for a gear reducer... use 2 starts or 1 start.
05:04 PM terr__: 1 revolution with 4 start is 8 mm movement... ya. mm not inches so 25.4/8*170/16 so = 33.7 pounds load (max). That is quite a bit!
05:04 PM _unreal_: terr__, lol I'm not gluing aluminum to wood
05:04 PM terr__: this is what the motors I currently have can do.
05:05 PM terr__: _unreal_, IU woulds use a screw/bolt or rivet
05:05 PM _unreal_: terr__, if you "READ" closely you'll notice I state drill holes to mount the aluminum rail <_unreal_> At this point I need to glue the "strip" stiffeners onto the bottom and drill holes to mount the rail
05:05 PM terr__: _unreal_, but you _can_ !!!
05:05 PM terr__: well I presume the strip stiffeners are al alloy? 6061?
05:06 PM _unreal_: I said CUT my wood board down
05:06 PM terr__: LOL
05:06 PM terr__: I'll try to talk youi into 3/4" plat aluminum 6061 glued to the wood!
05:07 PM _unreal_: not strong
05:07 PM _unreal_: I'm bolting the aluminum extrusion through the wood base
05:07 PM _unreal_: https://drive.google.com/open?id=1_y-p3rXoyAva_URZ5QvpYhxcZx1bH6i9
05:08 PM _unreal_: terr__, ^^
05:09 PM terr__: open builds equipment.
05:09 PM _unreal_: The board I glued 2 boards that I glued two boards together, was to long by design. So I could cut strips to glue on the bottom as stiffeners so the main base board doesnt bow
05:10 PM _unreal_: ?
05:10 PM _unreal_: open builds equipment?
05:10 PM _unreal_: I dont follow
05:10 PM terr__: extrusions look like what openbuilds handles. Their claim to fame.
05:11 PM terr__: So are you telling me you plan on gluing plywood to plyuwood to stiffen this?
05:15 PM terr__: those extrusions look pretty solid. how thick is hte metal? where to get them. I might want same. Looks much better than Openbuilds
05:15 PM terr__: looks like 3/8s or like 8mm stock
05:15 PM _unreal_: I got them out of the dumpster
05:15 PM _unreal_: the small extrusion I purchased from on line
05:15 PM terr__: Can you ship the dumpster leftovers?
05:16 PM _unreal_: I wish there had been more
05:16 PM _unreal_: I'm using those two big one's as the main stand offs
05:16 PM _unreal_: to hold the Y axis
05:16 PM terr__: hmmm... gives me an idea. THere is a metal re-cycling outfit here. I need to talk to them.
05:16 PM terr__: what kind of bearings.
05:16 PM _unreal_: the angle pieces I'm going to use for the verticals for the X
05:17 PM _unreal_: using all square style
05:17 PM _unreal_: they have the single screw holes in line in the middle
05:17 PM terr__: ya. And you want to stiffen the bottom. Which is 3/4" fir plywood?
05:18 PM terr__: what are the dimanesions of the 2 rails you have? and the cross peice?
05:18 PM _unreal_: its a hybrid of birch ply and MDF glued with fiberglass resin and vacuum bagged
05:19 PM _unreal_: https://drive.google.com/open?id=1_r_ozuO1Uy5PwTVqCG-p5dhFCRsagqq6
05:19 PM _unreal_: both are 3/4
05:19 PM terr__: You shouyld have used Titebond II.
05:19 PM _unreal_: why would I use a weaker glue
05:20 PM terr__: So 1/2" the MDF is not great. You need high density and I have not been able to find it. The plywood does not look like Birch. marine is better but still not great.
05:20 PM _unreal_: 1/2" wtf?
05:20 PM _unreal_: thats 1.5" thick
05:20 PM terr__: its stronger... much stronger than the wood.
05:20 PM _unreal_: My wood base is 1.5" thick
05:21 PM terr__: typo. 3/4 + 3/4 is 1.5.. I know that.
05:21 PM _unreal_: MDF for the TRUE and flat, birch PLY for the strength
05:21 PM terr__: Its still not very stiff. Ash is pretty stiff. MDF is not but its pretty stable.
05:22 PM _unreal_: mdf is not stiff I agree but its very true
05:22 PM _unreal_: stable out of water
05:22 PM terr__: is it solid core birch? From the pic I was thinking fir plywood.
05:22 PM _unreal_: I'm mounting it with the MDF down
05:22 PM _unreal_: so any fluids would not screw up the surface
05:23 PM _unreal_: its high density birch
05:23 PM terr__: don't get it wet. I used it for a workbench. Bad idea. Not I need to replace it. More to do.
05:23 PM jthornton: the only solid core I know of is baltic birch
05:23 PM _unreal_: that 2x4 sheet cost me $30 at home depot
05:24 PM terr__: there is baltic which I beleive comes ouyt of eastern Europe and its pretty damn good. But there are also solid code plywoods... used in cabinate making and I have not looked for them recently
05:24 PM _unreal_: its funny I've already got people asking me if I can build stuff I'm like MFER I dont even have the new machine built yet
05:24 PM terr__: home depot over here does not carry it as far as I know.
05:24 PM terr__: So what of the stiffeners. Where do they go and what material?
05:25 PM _unreal_: same material and it is going to be mounted on the bottom
05:25 PM jthornton: I've never seen any solid core ply that is not baltic birch and my wood supplier confirmed that
05:25 PM _unreal_: they will go across the short side they are from the left over mateial from the first photo
05:25 PM terr__: I think you would be better with solid ash. Hickory would be good also. Ply is not very stiff.
05:25 PM _unreal_: I have 1.5"x1.5" strips cut
05:26 PM Tom_L: i can get ~20 ply beech
05:26 PM _unreal_: and they will be glued to the bottom
05:26 PM terr__: They make hockey sticks out of hickory.
05:26 PM _unreal_: I think these are 7ply
05:26 PM jymmmm: I use MDF and 2 layers of PU, works GREAT
05:26 PM _unreal_: I need to bring my boards in from my van and lay them out and get a new photo
05:26 PM * _unreal_ loves his MAZDA5
05:27 PM terr__: New hockey sticks are fiberglass.
05:27 PM _unreal_: good hockey sticks are wood
05:27 PM terr__: Old ones were hickory. Only hockey sticks I liked were the broken ones.
05:27 PM _unreal_: before or after they found there 'moment"?
05:27 PM _unreal_: :_)
05:28 PM terr__: ya... and broken ones would be perfect for you. Damn strong and stable and they don't bend easily.
05:28 PM terr__: After.
05:29 PM _unreal_: my issue is my current machine works GREAT. very high resolution. but its a small work area
05:30 PM _unreal_: 7.75x12"
05:30 PM terr__: My new roomy buddy was telling me about his son's electric car. He's complaining about the range. I said: Get a trailer and head over to Home Depot and get a honda generator and some jerry cans. Put generator and gas cans in trailer and string the power cord from the generator. LOL.
05:30 PM _unreal_: https://drive.google.com/open?id=1J8gm1wh4DEiIFseUBme2xnSGNtxEDTAH
05:30 PM terr__: you need bigger. I am building almost esactly this to bolt to my table saw.
05:31 PM _unreal_: almost what?
05:31 PM _unreal_: My current machine works good dont get me worng
05:31 PM _unreal_: its just small
05:31 PM terr__: what you have. I only need to push wood through the saw
05:32 PM _unreal_: ? the big one or the small one?
05:32 PM _unreal_: I have built this with my current tiny machine I'm building a mini cnc machine for my daughter https://drive.google.com/open?id=1UnYCdaJ_NkxSoRKrc2QDcyepSrGQf4A3
05:32 PM terr__: that looks mighty fine! Hoceky sticks (or ash) are both better than oak and solid wood is way better than plywood
05:32 PM terr__: both. They both look pretty good. The rails you have look just fine.
05:33 PM _unreal_: solid wood is not as strong as PLY depending on how tis used
05:33 PM _unreal_: as far as I'm concerned, that mini cnc machine I'm building for my daughter is "good parenting ;)"
05:33 PM terr__: solid is much stronger in tension and compression. But across grain.. forget it. and for bending.. not great.
05:34 PM * _unreal_ needs more tequila
05:34 PM terr__: what kind of bearings in the prebuilt? ball berains or a bushing.
05:35 PM terr__: ball bearings I've seen on Amazon are inexpensive and have poor reviews. I suspect no damn good. Nook and other industrial suppliers talk about $30 per bearing and up.
05:38 PM _unreal_: :P peach and tequila dont mix
05:38 PM _unreal_: well
05:38 PM terr__: peach yogurt is good.
05:38 PM jymmmm: peach ice cream is good
05:38 PM _unreal_: as to bearings I ordered 2 from amazon
05:38 PM terr__: peach wine is good.
05:39 PM terr__: how much? I suspect if they are under $30 bux each they are no good. They will stick and the balls will slide and not roll.
05:39 PM _unreal_: :S PU my daughter just walked into my room.... just told her to shower
05:39 PM _unreal_: hehe
05:40 PM terr__: But I have zero experiance with them. I am looking to make bushings from Nylatron... unless I can find some.
05:40 PM _unreal_: they are WAY under $30 then again I ordered 3" one's
05:40 PM terr__: soccer practice?
05:40 PM _unreal_: I wish
05:40 PM _unreal_: recess
05:40 PM _unreal_: LOL
05:40 PM terr__: LOL - how old?
05:40 PM _unreal_: 10
05:40 PM terr__: Mine is 40.
05:40 PM _unreal_: adorable
05:41 PM terr__: I think she has the shower down pat by now.
05:41 PM terr__: Ya I like them when they are 10. 40 is okay too.
05:41 PM _unreal_: ya later tonight I have to spank her for talking back to her teachers... sigh
05:42 PM terr__: did you order a fully supported rail? what length? I am thinking something like SBR16? or bigger?
05:43 PM _unreal_: two of these for Z https://www.amazon.com/gp/product/B07G3D5265/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
05:43 PM terr__: I never spanked my kids every. I remember them coming in one day with a note. Kids were throwing snow balls at the teachers. So I relied: I think it is okay for the kids to trow snow balls at the teachers' heads providing they are soft.
05:43 PM terr__: Kids gave me dirty looks.
05:45 PM _unreal_: So ya I ordered two of those. I think they will be ok for Z
05:46 PM _unreal_: I may get two more blocks but I wont know if I need them till I get them in hand
05:46 PM Tom_L: hardly any travel
05:46 PM _unreal_: ya
05:47 PM terr__: ya... I was thinking along this line for my project. 7mm is too narrow for me... 20 mm is 3/4 of an inch... unless they are talking about thickness.
05:47 PM _unreal_: funny thing is I'm thinking they may be to short now
05:47 PM _unreal_: Thats why I'm doing 2
05:47 PM _unreal_: two in parallel
05:47 PM _unreal_: but I may end up buying larger one's who knows
05:47 PM _unreal_: I need to get the machine production to a higher level of maturity
05:48 PM _unreal_: o,O 20mm is CLOSE to an inch
05:48 PM _unreal_: err 3/4 inch
05:49 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Z_Axis_Assembly_Up.jpg
05:49 PM Tom_L: and i wish i had more Z
05:49 PM _unreal_: #@$%@$%&@$#%$@ freaking keyboard
05:49 PM _unreal_: I'm going nuts trying to flip something in cad and I'm keying the worng keybaord
05:50 PM jymmmm: Tom you got 8" of travel, how much more you want?
05:50 PM Tom_L: another 4-5"
05:50 PM Tom_L: then milling on the table or a vise wouldn't be an issue
05:50 PM terr__: must be the techila LOL. get it? tech-ila?
05:50 PM _unreal_: ya that thing is so TINY lol
05:51 PM _unreal_: errr? no
05:51 PM _unreal_: milling on a vice?
05:51 PM _unreal_: heh I was picturing your typicall bench vice
05:51 PM _unreal_: lol
05:52 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/Final/Vise_parts/Vise1.jpg
05:52 PM terr__: Last time I milled something I used my drill press. Ugly job but it worked. Next I sent it to a shop. Great job and a $400 bill! I need a mill and a lathe!
05:52 PM _unreal_: Tom_L, I need to take a new photos with the board cut down but here is the mock up https://drive.google.com/open?id=1_y-p3rXoyAva_URZ5QvpYhxcZx1bH6i9
05:53 PM _unreal_: I need a mill agreed
05:53 PM _unreal_: err lathe
05:53 PM _unreal_: I have wood late
05:53 PM _unreal_: lathe
05:53 PM Tom_L: i've got an old small metal lathe
05:54 PM terr__: I need a 5 foot length minimum. probably 6 feet. 5 will work. I'm thinking of an SBR16 1.5 meters long. And so far I've only found shitty bearings
05:54 PM terr__: better than a drill press.
05:55 PM _unreal_: terr__, I'm not sure I follow what your talking about?
05:55 PM terr__: I _could_ have bought a complete machine shop from my prof when he retired. I had no place to put it.
05:55 PM _unreal_: Tom_L, My father has a metal lathe that he has never done a damn thing with
05:55 PM _unreal_: terr__, $ how much?
05:55 PM terr__: _unreal_, I want to use an xy table to push 2x4's through my table saw
05:56 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Z_Axis_Pulley.jpg
05:56 PM terr__: the shop was under $5,000 mill lathe and lots of shop made tools. I had no place to put it.
05:56 PM _unreal_: Tom_L, ?
05:56 PM Tom_L: the lathe
05:57 PM _unreal_: that lathe looks like it was new in 1952
05:57 PM Tom_L: i said it was old
05:57 PM _unreal_: :) my father has one I should take a photo of
05:58 PM Tom_L: if i need anything bigger done i just go see my friend
06:00 PM terr__: _unreal_, that slider is a block of aluminum with two small bushings bolted to the aluminum block. can you replace the bushings? Where will you get parts?
06:01 PM terr__: https://www.amazon.com/SBR16UU-Linear-Bearing-Pillow-Router/dp/B073VHFVD4/ref=pd_di_sccai_2/187-3981370-2176852?_encoding=UTF8&pd_rd_i=B073VHFVD4&pd_rd_r=8f85b6c2-9c63-410d-b0d7-e4810a5b3c17&pd_rd_w=fxlEu&pd_rd_wg=XqSH2&pf_rd_p=91969358-e80f-4d1e-9cd9-073577930a16&pf_rd_r=M08DGTF381W19AFS74H9&psc=1&refRID=M08DGTF381W19AFS74H9
06:02 PM terr__: $22 bux. Probably no damn good! sticky balls.
06:06 PM terr__: I need to find shaft supports... link coming... I need at least 1.5 meters long. for likely 16mm shaft. Does anyone know where to get them?
06:06 PM terr__: https://www.amazon.com/dp/B00ZI16QBS/ref=sspa_dk_detail_2?psc=1&pd_rd_i=B00ZI16QBS&pd_rd_w=mdCLy&pf_rd_p=45a72588-80f7-4414-9851-786f6c16d42b&pd_rd_wg=RodmP&pf_rd_r=CYS7SBT60KGY2J8C7W2G&pd_rd_r=060e0ba8-3d89-4f25-8d33-9a3f5762a130&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyNVUzSUVMS05QWjRLJmVuY3J5cHRlZElkPUEwMTg2NzQxMlJRMkVJMEtVWk82TSZlbmNyeXB0ZWRBZElkPUExMDM0MjcyMlhYSDJQSzRHWENESyZ3aWRnZXROYW1lPXNwX2RldGFpbCZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=
06:07 PM terr__: I can get the shat real cheap. Like 4140 is about 150 for 10' of 5/8th and that is so close to 16mm its basically the same
06:08 PM terr__: _unreal_, Have you looked at shaft? Why did you select the ones you have on order?
06:09 PM terr__: I have nothing on order yet and I'm tryingf to figure out what to order.
06:23 PM elmo40: order everything!!
06:23 PM Tom_L: 2 of each
06:23 PM elmo40: in doubles, too. one is usually always broken
06:23 PM Tom_L: so when you break the first one...
06:24 PM Tom_L: i personally like the square rails better
06:24 PM terr__: Applyu those ideas to GFs
06:24 PM terr__: round works
06:52 PM _unreal_: bbiab going to "limes" with my daughter :)
06:53 PM _unreal_: https://goo.gl/maps/uF9RtWNpNChFMHhP7
06:53 PM _unreal_: :)
07:04 PM elmo40: i'm not a fan of those round rails for CNC machines.
07:05 PM elmo40: although, my only experience with them is through a friend. his rails weren't hardened so they created grooves in about 9month's time.
07:05 PM elmo40: IGUS does make bushings for them, though. decent enough for 3D printers :-)
08:08 PM _unreal_: elmo40, I'd suggest "in" triplicate
10:45 PM ve7it: oh no... Jymmmmmmmmmm is missing
10:46 PM ve7it: maybe California slid into the ocean
11:04 PM roycroft: california is not going to slide into the ocean
11:04 PM roycroft: it's going to be even worse for jymmm
11:04 PM roycroft: los angeles is drifting northward
11:05 PM roycroft: in a few million years it will be due west of san francisco
11:31 PM BitEvil is now known as SpeedEvil
11:38 PM elmo40: then they might get snow!!
11:38 PM elmo40: what will happen then?? people will die O_o
11:42 PM roycroft: it does not snow in san francisco
11:42 PM roycroft: yet
11:55 PM flyback: <flyback> https://www.goldmine-elec-products.com/prodinfo.asp?number=G22483
11:55 PM flyback: <flyback> too bad he doesn't have a tx module