#linuxcnc Logs

Nov 06 2019

#linuxcnc Calendar

02:15 AM Iam_Borg is now known as PureHate
03:29 AM PureHate is now known as TwoTall
05:02 AM jthornton: morning
05:02 AM XXCoder: hey
05:04 AM XXCoder: interesting https://www.popsci.com/science/article/2012-10/fyi-domesticated-foxes/
05:06 AM XXCoder: certainly a jumper
05:15 AM Tom_L: morning
05:15 AM XXCoder: yo
05:16 AM Loetmichel: hmm, anybody some advice: should i "repair" the debian wheezy packet lists (is that even possible?) or set up the two machines with the "new" stretch version? (CNC6040s, plt port, two core2duo computers with 4gb ram)
05:17 AM Tom_L: how sentimental are you?
05:17 AM Loetmichel: its a bit inconvenient to not being able to install new features any more... like VNC or VLC for the webcam... or simple samba to not have to carry the milling files on a stick to the machine
05:17 AM Loetmichel: sentimental?
05:17 AM Loetmichel: i meant from a "never change a running system" POV
05:18 AM Loetmichel: dont know if the cpus are powerful enough for the "soft realtime" in the stretch build
05:18 AM Tom_L: i still run wheezy on the mill
05:18 AM Tom_L: but i'm running buster on my test pc
05:19 AM jthornton: I'm still running Ubuntu 10 on the CHNC
05:19 AM Deejay: hi
05:20 AM Loetmichel: so maybe the question was: will the stretch build run on a core2duo 2,8ghz well enough for LPT use?
05:22 AM Loetmichel: and can i simply copy the stepconf files onto the new machine or do i have to make a new one from scratch?
05:23 AM jthornton: if you don't change the LinuxCNC version nothing changes with your config
05:34 AM Tom_L: jthornton, i spend a few min last nigh with the cam and got this but it needs work: http://tom-itx.no-ip.biz:81/~webpage/cnc/Screenshot%20at%202019-11-05%2023-13-49.png
05:34 AM Tom_L: the z clear etc need fixed for sure
05:34 AM jthornton: cool
05:35 AM XXCoder: i dont really understand how cam works in freecad
05:35 AM Tom_L: and i'd like to figure out lead in lead out moves etc
05:36 AM Tom_L: it looks similar in layout to the newer cad cam packages i've seen but not as refined
05:36 AM XXCoder: one thing im happy about is that Path isnt as "cursed" as assembly
05:37 AM Tom_L: to do it right, you would add a vise or clamps etc to the model
05:37 AM Tom_L: make an assembly then add tools
05:41 AM Tom_L: i kinda think you need to define units for the cam separate from the model but i haven't gotten that far
05:42 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/test.txt
05:42 AM Tom_L: that's the output from it
05:42 AM Tom_L: using the linuxcnc post
05:43 AM Tom_L: clearly that's mm
05:56 AM jthornton: yea I think freecad has problems with imperial units
06:21 AM TwoTall is now known as Iam_Borg
08:24 AM CaptHindsight: what do you tell clients that don't know what they are doing, that they don't know what they are doing?
08:25 AM CaptHindsight: say they want you to build a controller with a PC that has poor latency but insist that you use their PC
09:00 AM JT-Shop2: use it with no guarantee at all
09:01 AM JT-Shop2: todays flight is canceled due to rain :(
09:01 AM JT-Shop2: I guess I might as well go to work
10:17 AM drdoc: Loetmichel: I'm getting 12-13 usec be thread latency on a Core 2 Quad, if that helps
10:21 AM drdoc: CaptHindsight: tell them what I always told clients when they really really really needed features or access that posed major security issues
10:22 AM drdoc: "You tell me what you want in an email. I'll reply and detail the problems with that. If you then instruct me, quoting my objections, to do it anyway, I'll do it. "
10:23 AM drdoc: that's usually enough to make the client reconsider
10:36 AM Loetmichel: FINALLY! Both CNC routers done and working! -> https://www.youtube.com/watch?v=lm-kpV2Msn0
10:36 AM Loetmichel: drdoc: sounds promising
10:37 AM Loetmichel: will attempt to upgrade one of the machines first, and take an image of the disk beforehand so i can revert to it if all fails
10:45 AM drdoc: Loetmichel: I forgot to add that was running Stretch with lcnc 2.8
10:49 AM Loetmichel: i assumend as much ;)
12:38 PM jymmmm: hola
12:45 PM CaptHindsight: https://www.ebay.com/itm/1981-MATSUURA-MC-500V-CNC-with-YASNAC-3000G-control/283531831618
12:45 PM CaptHindsight: they have 2 of them ,, $2k each
12:46 PM jymmmm: I bid $10 with free shipping
12:53 PM jymmmm: YAY serial ports :D
12:57 PM jymmmm: SpeedEvil: I had to pull out my netbook to program my radio, I have a EC34 to TRUE RS-232 adpater, even works in MS-DOS :)
01:19 PM CaptHindsight: https://www.ebay.com/itm/Matsuura-MC-1000-VX-vertical-milling-center-55-table/201871869576 $4500
01:20 PM CaptHindsight: Spindle speeds up to...........................................6000 RPM
01:20 PM CaptHindsight: Spindle taper........................................................BT 40
01:33 PM drdoc: jymmmm: do you know the model of that expresscard?
01:34 PM jymmmm: drdoc: yeah, hang on
01:35 PM Rab: drdoc, are you looking for PCMCIA/ExpressCard crap?
01:35 PM * drdoc notes that EC-equipped laptops are now "obsolete"
01:35 PM Rab: Because I have a bin of that stuff about to go to thrift store or e-waste.
01:35 PM drdoc: where are you?
01:36 PM Rab: 512
01:36 PM drdoc: I'll take it, if you're cool with me selling it elsewhere
01:36 PM jymmmm: drdoc: https://www.ebay.com/itm/Best-Connectivity-1-Port-RS232-Serial-Express-Card-34mm-For-Laptop-Notebook-/173905189898
01:37 PM Rab: Well if it finds somebody willing to pay to use it, that's 100% better than e-waste.
01:37 PM drdoc: Rab: that serial adapter is the only thing I'm really *looking* for
01:37 PM drdoc: jymmmm: ooooh, no dongle even!
01:37 PM drdoc: thanks!
01:37 PM Rab: I feel like I have a serial adapter, but not sure.
01:38 PM drdoc: Rab: some folks get weird about you selling stuff they gave you free
01:38 PM Rab: Oops, I meant CardBus not ExpressCard.
01:38 PM drdoc: Including my entire clan
01:38 PM drdoc: CardBus is good too
01:38 PM jymmmm: drdoc: Mine is blue instead of orange/green, but it is "Best Connectiity" brand and it really does work in MS-DOS with no drivers
01:38 PM Rab: drdoc, that is understandable, so I appreciate the notification up front.
01:40 PM jymmmm: drdoc: Hell, I even added a serial port to my macbook using it, kinda cool
01:40 PM drdoc: jymmmm: cool, that MS-DOS part isn't easy to find in EC
01:40 PM drdoc: wow
01:40 PM drdoc: that *is* cool
01:40 PM jymmmm: drdoc: instantly recognized by osx too
01:40 PM drdoc: I have an old G4 MBP sitting by my leg
01:40 PM jymmmm: IDK about G4, that's motorola
01:41 PM jymmmm: ...not intel
01:41 PM drdoc: heh
01:42 PM drdoc: I sold my 2008 MBP about 8 minutes before it became worthless
01:42 PM drdoc: now my Macbook is a Thinkpad T440p
01:43 PM jymmmm: drdoc: THIS is the one I have... and that's the chipset it uses https://images-na.ssl-images-amazon.com/images/I/71smJxuMlQL._SL1500_.jpg
01:43 PM jymmmm: MCS9901
01:44 PM CaptHindsight: Rab: EC also stands for Embedded Controller, which laptops still use
01:44 PM CaptHindsight: was thinking, what are they going to use instead?
01:45 PM jymmmm: CaptHindsight: EC = ExpressCard/34 in this case
01:45 PM CaptHindsight: please send me all your scrap Thinkpads from before 2012 or so
01:45 PM drdoc: USB-C
01:45 PM CaptHindsight: jymmmm: yeah
01:46 PM drdoc: CaptHindsight: once again, the protocol that won was nowhere near the best
01:47 PM jymmmm: Now, I just have to find a linux for my netbook that supports netflix
01:48 PM CaptHindsight: windows in virtualbox
01:48 PM jymmmm: CaptHindsight: It's an ATOM netbook, 32bit
01:48 PM drdoc: jymmmm: Android
01:48 PM CaptHindsight: i had one that died, went back to AMD netbooks
01:49 PM CaptHindsight: virtual android machine
01:49 PM jymmmm: drdoc: elaborate?
01:49 PM CaptHindsight: https://www.makeuseof.com/tag/run-android-apps-games-linux/
01:50 PM CaptHindsight: jymmmm: https://anbox.io/
01:50 PM CaptHindsight: use android apps on Linux
01:50 PM CaptHindsight: Netflix for Android app for example
01:50 PM drdoc: jymmmm: IIRC there's a decent x86 port of Android
01:51 PM drdoc: also, Chromium is supposed to have the extensions for Netflix
01:51 PM drdoc: I haven't tried either
01:51 PM CaptHindsight: or drop Netflix and get movies from other places that you can save on your local drive
01:52 PM drdoc: although I'm about to be on the same mission - Netflix on my linux laptop
01:52 PM CaptHindsight: or so people say
01:52 PM jymmmm: drdoc: it does, but there is't a 32bit chrome
01:52 PM jymmmm: isn't
01:52 PM drdoc: urgh
01:53 PM CaptHindsight: ouch Atom 32b
01:53 PM jymmmm: CaptHindsight: I have 800+ movies, but I want netflix
01:53 PM CaptHindsight: wah waah waa
01:53 PM CaptHindsight: :)
01:53 PM * drdoc is trying to figure out what to do with an Asus Zenbook with the customary cancerous screen
01:53 PM CaptHindsight: have to look that up
01:54 PM drdoc: CaptHindsight: Haswell (I think) i5 with 4GB, 13" screen, Win 10 BIOS key
01:55 PM CaptHindsight: https://en.m.wikipedia.org/wiki/Zenbook
01:55 PM drdoc: UX31A
01:55 PM CaptHindsight: whats the cancer screen all about?
01:55 PM Rab: CaptHindsight, if you're serious, I have 3x Thinkpad T60p. Their GPUs all spontanteously desoldered, but they have lovely 15.4" 1920x1200 screens. ;)
01:55 PM drdoc: ah, Ivy Bridge, not Haswell
01:55 PM drdoc: CaptHindsight: hold on
01:56 PM jymmmm: Rab: MY T60 has thermal issues too, great screen with 1900 reoslution
01:56 PM CaptHindsight: Rab: and great keyboards
01:56 PM CaptHindsight: I considered making new motherboards for the T60's
01:56 PM CaptHindsight: with new cpu/gpu's
01:56 PM CaptHindsight: and upgrade the batteries
01:57 PM Rab: CaptHindsight, indeed. I have a W530 now which is very nice, but the chiclet keyboard and 1080p screen are tragic.
01:57 PM jymmmm: CaptHindsight: Just get rid of the case and mount in a fishtank
01:57 PM Rab: CaptHindsight, I believe it's been done.
01:57 PM CaptHindsight: http://openlunchbox.com/open-laptop/
01:57 PM CaptHindsight: was going to do the whole shebang
01:58 PM drdoc: CaptHindsight: can't find a photo, but the LCD seems to delaminate
01:58 PM jymmmm: CaptHindsight: have you used anbox?
01:58 PM CaptHindsight: jymmmm: nope the RTAI dev does though
01:58 PM drdoc: it's still usable, just looks nasty
01:58 PM CaptHindsight: runs some android app on gentoo
01:58 PM Rab: CaptHindsight, https://hackaday.com/2018/03/12/new-guts-make-old-thinkpads-new/
01:58 PM jymmmm: CaptHindsight: really?
01:59 PM CaptHindsight: we looked for new LCD's for the old Thinkpads but the problem is form factor
01:59 PM drdoc: It'd be a great LCNC head - 13" touuchscreen - if it had any useful ports at all
01:59 PM CaptHindsight: 4:3 vs 19:10
01:59 PM drdoc: CaptHindsight: what's with the Thinkpads?
01:59 PM CaptHindsight: great design, especially keyboards
01:59 PM drdoc: well yes, I have several
02:00 PM CaptHindsight: but just old tech now for cpu and battery
02:00 PM drdoc: I meant what models are you using and for what?
02:00 PM CaptHindsight: so we looked at reproducing them
02:00 PM CaptHindsight: with all new parts
02:00 PM CaptHindsight: http://openlunchbox.com/open-laptop/keyboard/
02:01 PM CaptHindsight: it came down to designing a new laptop around the good keyboard design
02:01 PM CaptHindsight: they still make them, the keyboards
02:01 PM Rab: I guess the ones I have are T61p.
02:02 PM CaptHindsight: http://openlunchbox.com/smf/index.php?topic=4.0
02:02 PM drdoc: there's actually a desktop keyboard made on the Thinkpad layout
02:02 PM drdoc: Rab: I have one
02:02 PM CaptHindsight: http://openlunchbox.com/smf/index.php?topic=32.0 Topic: Keyboards - Backlit vs key size
02:02 PM drdoc: T8100 C2D, couple GB of RAM
02:03 PM Rab: drdoc, I used those for years. Whenever one would die I'
02:03 PM CaptHindsight: we had a chart of the responses
02:03 PM Rab: d buy another off eBay for $100, swap the SSD and keep going.
02:03 PM CaptHindsight: pretty much everyone wanted a T60 keyboard
02:03 PM drdoc: there was a docking station for it on CL last week, for $1015
02:03 PM drdoc: err
02:03 PM drdoc: $10-15
02:03 PM BubbleRe- is now known as BubbleRep
02:03 PM CaptHindsight: backlit was just gravy
02:04 PM Rab: But the GPU aging was a real problem, the last one only lasted for a few months. So I gave up on that.
02:04 PM CaptHindsight: Rab: needs to be reballed?
02:04 PM drdoc: I haven't had any trouble with mine
02:04 PM Rab: CaptHindsight, based on what I have read, and the failure mode, I believe so.
02:05 PM drdoc: A guy at work gave it to me; either the BIOS or HDD was passworded
02:05 PM CaptHindsight: http://openlunchbox.com/ our website dedicated to open source hardware that could not be made open source, we tried
02:05 PM drdoc: I had to solder a serial port into the GPIO pins
02:05 PM CaptHindsight: except for the ECU
02:06 PM CaptHindsight: those we could make all open source..
02:06 PM Rab: But the W530 has an 8-core i7; I wouldn't go back to C2D for general use.
02:06 PM CaptHindsight: but it violates all the EPA type laws
02:06 PM roycroft: openlunchbox.com sounds like a good place to go and get some sammiches
02:07 PM CaptHindsight: roycroft: forgot how that came to be, the name
02:07 PM Rab: CaptHindsight, how does EPA relate to open source?
02:07 PM drdoc: Rab: I love the T440 series
02:07 PM CaptHindsight: Rab: you can't use the ECU on street cars
02:08 PM Rab: CaptHindsight, ahh, got it
02:08 PM CaptHindsight: so it could be used "off road only"
02:08 PM Rab: drdoc, I have heard those are very highly regarded, but I gotta have 15". ;)
02:09 PM Rab: Used to be for greatest number of tiny xterms, but now just because my eyes are aging.
02:12 PM CaptHindsight: Rab: yeah I wish I had 4K monitors 20 years ago, now I need glasses
02:14 PM jymmmm: CaptHindsight: How many 60" displays do you have running concurrently on the same system?
02:15 PM CaptHindsight: jymmmm: usually 2, sometimes 3
02:15 PM jymmmm: CaptHindsight: SMH
02:15 PM CaptHindsight: I have 20ft displays as well in 4K
02:15 PM CaptHindsight: projected :)
02:16 PM CaptHindsight: jymmmm: even my printers have 4K displays :)
02:16 PM jymmmm: lol
02:16 PM CaptHindsight: https://imgur.com/zvxoHUT
02:17 PM drdoc: CaptHindsight: open-source ECU just can't be *discovered* on street cars
02:17 PM jymmmm: ah, optical printer
02:17 PM CaptHindsight: drdoc: well yes
02:18 PM drdoc: I have a friend whose cars' frames are all pre-'64
02:18 PM drdoc: mostly mid-late '90s drive trains
02:18 PM CaptHindsight: i used to only drive 73 and earlier
02:19 PM drdoc: no emission equipment at all
02:19 PM CaptHindsight: now I'm up to 94 with OBD-I
02:19 PM drdoc: heh
02:19 PM CaptHindsight: will change that to an open ECU soon
02:19 PM CaptHindsight: rusefi
02:20 PM drdoc: In TX, anything pre-64 is exempt from any kind of emissions standard
02:20 PM CaptHindsight: https://www.rusefi.com/
02:20 PM CaptHindsight: up here it's 94 and earlier they don't test or check
02:20 PM drdoc: they don't look for a catalytic converter?
02:21 PM CaptHindsight: nope, no testing anymore
02:21 PM drdoc: wow
02:21 PM CaptHindsight: yes, just 95 and up
02:21 PM CaptHindsight: now it's an official antique at 25 years old
02:22 PM drdoc: that's true in Texas too, but you have to register as an antique
02:23 PM drdoc: and it can only be driven "to and from Antique-related events"
02:23 PM CaptHindsight: you can get antique plates, yeah same
02:23 PM CaptHindsight: but everyone drive year round
02:23 PM drdoc: oh yeah
02:24 PM CaptHindsight: think it's $50 /year vs $100
02:24 PM CaptHindsight: so some yahoo could ticket you
02:24 PM drdoc: how does rusEFI generally affect gas mileage and engine life?
02:24 PM CaptHindsight: depends on how you tune
02:25 PM * drdoc drives a 2008 PT Cruiser
02:25 PM drdoc: it's pretty pitiful, so right on the line between power & preservation
02:25 PM drdoc: that's where I'd tune it, I mean
02:26 PM drdoc: I asked because nearly everyone I've known who "chipped" their cars ended up replacing or rebuilding an engine
02:27 PM CaptHindsight: back to work here, bbl
02:27 PM drdoc: later!
02:27 PM CaptHindsight: likely too much lean
02:27 PM CaptHindsight: or they just beat it too hard
02:27 PM drdoc: likely just dumb
02:27 PM CaptHindsight: not due to the ECU swap
02:28 PM drdoc: I always figured other mods made possible by the swap
02:28 PM drdoc: or made useful
02:28 PM CaptHindsight: saw this the other day, ever have a spongy brake pedal?
02:28 PM drdoc: of course
02:29 PM CaptHindsight: post #9 https://forum.ih8mud.com/threads/spongy-brakes.1140322/#post-12388120
02:31 PM drdoc: ouch
02:31 PM drdoc: 10-yard penalty!
02:32 PM drdoc: Roughing the pun!
02:34 PM * drdoc goes off to Do Things
02:38 PM Rab: I drive a 1993 Volvo, it's now exempt from emissions testing.
02:39 PM Rab: Although there might be a separate issue with modifying or removing the factory emissions equipment whether it's still in play or not.
02:41 PM Rab: I converted a Ford van to dedicated CNG, threw the gasoline tank away. But it wasn't clear whether I had to hang on to the charcoal canister to get it inspected, even though it obviously passed emissions regardless.
02:46 PM Rab: I took it to the inspection shop and told the kid on duty that the tanks were for nitrous. He seemed suitably impressed. ^_^
02:47 PM jymmmm: It's funny they use charcoal, as it gets depleated as it fileters
02:50 PM Rab: I guess it just releases the fumes back into the intake.
02:51 PM jymmmm: yeah
02:55 PM jymmmm: Does anyone know if garage door electric eye's go bad?
02:55 PM XXCoder: jthornton: https://github.com/FreeCAD/FreeCAD-library
02:57 PM drdoc: jymmmm: I've replaced a few
02:57 PM drdoc: mostly water damage, one undetermined
03:09 PM jymmmm: drdoc: ah
03:10 PM jymmmm: I think it's the wiring, not really sure and they just a specialed plug. Not even sure how to bypass it to open close the garage
03:10 PM jymmmm: beyond the safety release that is
03:35 PM Deejay: gn8
03:41 PM jthornton: jymmmm, yep
03:42 PM jymmmm: jthornton: are they mostly universal? craftsman
03:42 PM jthornton: no, they communicate back to the opener
03:43 PM jthornton: which is why you can't just tie the wires together and go on
03:43 PM jthornton: XXCoder, interesting
03:44 PM XXCoder: yeah. hoped it was more tech stuff but its more "common" stuff
03:44 PM XXCoder: like beer bottle lol didnt fully explore though
03:45 PM Tom_L: grab_freecad
03:45 PM XXCoder: aha!
03:46 PM Tom_L: might show how some stuff is drawn
03:46 PM XXCoder: "electric parts"
03:46 PM XXCoder: it has some stuff like endstops
03:48 PM jymmmm: jthornton: Yeah, I'm still trying to figure out HOW they are providing power AND singling at the same time. I got 6VDC, zero AC volts.
03:59 PM Tom_L: jymmmm, similar to this: https://www.maximintegrated.com/en/design/technical-documents/tutorials/1/1796.html
04:00 PM jymmmm: Tom_L grage doors use one wire?! really?
04:00 PM Tom_L: new ones are even more complex i think
04:03 PM CaptHindsight: jymmmm: http://whythefuckwasibreached.com/
04:05 PM miss0r: Going to pick up my new mill tomorrow: https://media.exapro.com/product/2017/02/P70206110/f5d8cc7ca0e656105ce413d3e5ead418/maho-mh-500w-cnc-vertical-milling-machine-p70206110_3.jpg
04:05 PM miss0r: I can't wait :D
04:05 PM jymmmm: CaptHindsight: lol
04:07 PM JT-Shop: miss0r: from that angle it looks like the control panel is bigger than the machine lol
04:07 PM miss0r: not too far from the truth :D
04:08 PM miss0r: hehe. at the moment I have the machine packet for transport, which mean detaching the control box and laying it on the table of the mill. so the angle is cheating a bit :)
04:10 PM andypugh: First job, mill a letter “E”
04:14 PM Tom_L: jthornton, under Edit -> Preferences -> Path -> Job Preferences scroll to the bottom and select Post Processor, after selecting "linuxcnc" under Default Areguments look at the mouseover help box and select --inches
04:15 PM Tom_L: or any other parameters for the post
04:15 PM Tom_L: does linux have a hotkey to capture the screen?
04:16 PM Tom_L: mmm 'alt printscreen' won't capture the help box
04:18 PM Tom_L: https://github.com/FreeCAD/FreeCAD/blob/master/src/Mod/Path/PathScripts/post/linuxcnc_post.py
04:18 PM Tom_L: you can see the options there
04:19 PM JT-Shop: I use gimp
04:19 PM Tom_L: it won't capture the popup though
04:19 PM Tom_L: ^^ next best option
04:20 PM JT-Shop: yea set a time delay
04:20 PM Tom_L: but you can't edit the .py file here because we're running the appimage
04:20 PM Tom_L: UNIT_FORMAT = 'mm'
04:21 PM Tom_L: lines 72..75
04:21 PM Tom_L: or anything else you wanna change there
04:26 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/JT-SHOP/Screenshot%20at%202019-11-06%2016-19-18.png
04:26 PM Tom_L: there's the options
04:28 PM Tom_L: too bad you can't 'git' ver.18
04:28 PM Tom_L: i'd mod the .py file
04:29 PM Tom_L: .19 pre is out btw
04:34 PM CaptHindsight: huh 1/2 hour drive south and it's near 60F, 1/2 hour north, snow storm
04:34 PM Tom_L: supposed to turn cold here tonight
04:34 PM CaptHindsight: which way do i drive?
04:34 PM Tom_L: you're in the middle of the front :)
04:35 PM CaptHindsight: https://www.wunderground.com/wundermap?lat=42.24&lon=-88.362 click the radar
04:37 PM jthornton: Tom_L, I'll settle down here in a bit just running around doing chores
04:38 PM Tom_L: i wonder if you can build it from source
04:38 PM Tom_L: tempted to download it
04:39 PM Tom_L: time to eat here anway
04:48 PM jthornton: https://github.com/FreeCAD/FreeCAD
04:48 PM jthornton: scroll down for compiling
04:49 PM Tom_L: i'm looking at it now
04:49 PM Tom_L: downloading as well
04:50 PM jthornton: I need to do that on a clean PC
04:50 PM Tom_L: this one is fairly clean
04:51 PM jthornton: https://www.freecadweb.org/wiki/CompileOnUnix
04:51 PM Tom_L: yeah that's the page i'm on
04:54 PM jthornton: I get to figure out how to use Wago software and how to program a Wago controller tomorrow...
04:54 PM Tom_L: never heard of it
04:56 PM Tom_L: jthornton, sudo apt build-dep freecad
04:59 PM jthornton: https://www.wago.com/global/c/plcs-%E2%80%93-controllers
05:00 PM Tom_L: fun
05:01 PM Tom_L: at least the docs are up to date for buster
05:02 PM jthornton: that's odd up to date docs lol
05:03 PM Tom_L: if you expand the debian folder and scroll down, they provide a one line apt install
05:03 PM Tom_L: for the dependencies
05:03 PM Tom_L: fairly lengthy
05:06 PM jthornton: never did figure out how to start a path this morning
05:06 PM Tom_L: oh?
05:06 PM Tom_L: define a tool first
05:07 PM jthornton: did that and started a job
05:07 PM Tom_L: they let you import a tool table
05:07 PM Tom_L: it's a damn shame they don't support linuxcnc tool table format
05:07 PM Tom_L: https://www.freecadweb.org/wiki/Path_Walkthrough_for_the_Impatient
05:08 PM jthornton: yea ran out of time this morning, thanks for the link
05:08 PM Tom_L: https://www.freecadweb.org/wiki/Path_Workbench#Preferences
05:09 PM Tom_L: that one liner apt build-dep works
05:09 PM Tom_L: it's still downloading libs
05:17 PM jthornton: cool
05:26 PM Tom_L: a few missing
05:26 PM Tom_L: qt4 libs
05:30 PM jthornton: you should not be using qt4 in debian 10
05:30 PM Tom_L: i read that just now
05:30 PM jthornton: qt5 and python 3,
05:30 PM Tom_L: installing the qt5 stuff
05:30 PM _unreal_: hello
05:30 PM jthornton: you might have to do it the hard way lol
05:31 PM Tom_L: they've got a list for it all
05:31 PM jthornton: making a bit of progress with the path interface... a bit clunky and not intuitive at all
05:31 PM Tom_dev: Single command for Python 3 and Qt5
05:31 PM Tom_L: look for that if build it
05:32 PM Tom_L: i'd post the line but they might ban me :)
05:36 PM _unreal_: Are there any highly suggested parport cards that are suggested for lcnc?
05:36 PM _unreal_: I'm going to order one for one of the towers
05:39 PM jthornton: oh you mean that huge apt get line?
05:39 PM Tom_L: yeah
05:40 PM Tom_L: after installing py3 and qt5 stuff i wonder if the makefile needs to be updated to reflect that
05:40 PM jthornton: I like to break it up into smaller chunks in case there is an issue
05:40 PM Tom_L: none found
05:40 PM Tom_L: blew right thru it
05:40 PM jthornton: prob run cmake again
05:40 PM Tom_L: i did
05:40 PM Tom_L: still says qt4 libs not found
05:42 PM jthornton: I wonder if they have a leftover dependency that didn't get removed
05:42 PM jthornton: you getting that cold front tonight?
05:43 PM Tom_L: supposed to yes
05:56 PM jthornton: hmm after you run the g code sim you can't see the model anymore even if you turn off the job]
05:57 PM Tom_L: move the cursor up the list?
05:57 PM Tom_L: on the left... maybe
06:01 PM jthornton: I finally deleted the job and got the part back lol
06:01 PM Tom_L: still an issue with qt4 libs
06:10 PM Loetmichel: *HMPF* 10 minutes of grid blackout... whole street dark. That didnt happen here for about a decade. Note to self: buy new batteries for the UPS... they lasted about 10 secs. Note to self two: buy new server PSU... doesent start any more :-(
06:10 PM _unreal_: any one remember the link to that mini belt sander?
06:10 PM _unreal_: mfers didnt cancle my order the belts just arrived
06:10 PM _unreal_: so I may as well order the belt sander thing
06:10 PM jthornton: two many notes Loetmichel
06:10 PM _unreal_: like this only $20 some odd bucks https://www.ebay.com/i/113836546158?chn=ps&norover=1&mkevt=1&mkrid=711-117182-37290-0&mkcid=2&itemid=113836546158&targetid=596843724198&device=c&mktype=pla&googleloc=9012012&poi=&campaignid=2086169716&mkgroupid=76147899766&rlsatarget=aud-496202329659:pla-596843724198&abcId=1141016&merchantid=127685092&gclid=Cj0KCQiA-4nuBRCnARIsAHwyuPqlD6ChDBYrChYaWzi3Q7gW5I5f17OCoznJP8x8VL-wmNS0bABz0jQaAq0AE
06:10 PM _unreal_: ALw_wcB
06:13 PM _unreal_: What this it? https://www.aliexpress.com/item/33014864680.html?src=google&src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=1582410664&albag=59754279756&trgt=539263010115&crea=en33014864680&netw=u&device=c&gclid=Cj0KCQiA-4nuBRCnARIsAHwyuPoU_X56FZbmRniG_f4Un1GgkJX-OUrxhvRUaWbpwPrARpUBdnULaeQaAjLXEALw_wcB&gclsrc=aw.ds
06:15 PM Tom_L: jthornton, missing pyside
06:16 PM jthornton: hmmm
06:16 PM _unreal_: how dare you
06:17 PM jthornton: everything after the ? and including the ? can be deleted from those huge links...
06:17 PM Tom_L: or use tinyurl if you're too lazy to remove it
06:20 PM Loetmichel: _unreal_: that motor doesent look like it will survice long in a grinding dust laden enviroment.
06:20 PM Loetmichel: just saying
06:20 PM Loetmichel: survive
06:20 PM jthornton: you don't expect toys to run long do you?
06:21 PM Tom_L: mine didn't. i generally took em apart
06:21 PM Loetmichel: i wouldt call that a "toy". More like a "model plane/ship builders belt grinder"
06:22 PM jthornton: should work for a bit on balsa
06:24 PM jthornton: https://www.trick-tools.com/Variable-Speed-Multitool-Bundle-MT-VS-Bundle-12899
06:25 PM jthornton: I have that one... a grinding sob
06:25 PM jthornton: well I don't have that exact model
06:27 PM jthornton: https://www.trick-tools.com/Multitool-2-x-48-inch-1-hp-Belt-Grinder-MT482-8953
06:27 PM jthornton: that one but with a JET grinder
06:28 PM jthornton: Tom_L, I guess for machining start with a reverse pad so the top is Z0
06:30 PM _unreal_: heh
06:30 PM _unreal_: my issue is that I do a lot of small stuff
06:30 PM _unreal_: and I agree the motor looks questonalbe
06:31 PM Tom_L: jthornton, or set your z clear stuff higher
06:31 PM Tom_L: i thought about that though
06:31 PM _unreal_: hehe, I just told stinky to go take a shower
06:31 PM _unreal_: my daughter
06:32 PM Tom_L: i think in the tool setup is where you set the pass dept
06:32 PM jthornton: they way I work Z0 is the top of the part
06:32 PM Tom_L: depth
06:32 PM Tom_L: yeah
06:32 PM Tom_L: it's generally -1 for me
06:32 PM Tom_L: i set my tools with a 1" block on top of the z
06:32 PM Tom_L: safety factor
06:32 PM _unreal_: 1" block?
06:35 PM Tom_dev: jthornton, https://forum.freecadweb.org/viewtopic.php?t=30382
06:35 PM jthornton: I just use a dowel and enter that diameter so the top of the material is Z0
06:35 PM Tom_L: yeah
06:35 PM _unreal_: you guys dont use touch sensors?
06:35 PM Tom_L: same idea, different approach
06:37 PM Loetmichel: _unreal_: i usually use a sheet of 80gr/m^2 paper as a "touch sensor". Moving z down in 0.05mm steps while moving the paper back and forth until it catches, then set Z to 0,1mm, done ;)
06:37 PM drdoc: jymmmm: as far as I could ever figure out, it's manual till you get the sensor working
06:37 PM jthornton: looks like dependency hell all over again
06:38 PM Tom_L: heh
06:38 PM Loetmichel: drdoc: i have one of those tool senors
06:38 PM _unreal_: jthornton, I've often just done a "download * all" when it comes to dependiciys
06:38 PM _unreal_: and typically it finds the right now
06:38 PM Loetmichel: dont like it very much, especially not with 30° engraving bits
06:38 PM jthornton: I use a dowel and Z down to lower than the dowel and Z up by 0.001" until the dowel clears done
06:39 PM _unreal_: Loetmichel, I use 10° v bits
06:39 PM Loetmichel: same there i suppose
06:39 PM jthornton: https://www.youtube.com/watch?v=VmRUJk0ptN4
06:39 PM Loetmichel: VERY thin tip
06:39 PM jthornton: 21 seconds
06:40 PM _unreal_: jthornton, I use a dirt cheap touch sensor
06:40 PM Loetmichel: and tungsten carbide is brittle ;)
06:41 PM drdoc: jthornton: same, but I usually set the tool on the dowel and tighten the collet
06:41 PM drdoc: ;-)
06:41 PM jthornton: wow I started my plasma 11 years ago with EMC2 https://www.youtube.com/watch?v=e70jdiDm7yc
06:41 PM jthornton: the collet will draw the tool in as you tighten...
06:41 PM drdoc: I know, but it's a good place to start, and surprisingly consistent
06:42 PM drdoc: if it didn't suck up a little, it wouldn't work
06:43 PM drdoc: there oughta be a way to use a cheap laser level as an offset sensor
06:44 PM Loetmichel: drdoc: i dount a laser would work for various mill bits
06:44 PM Loetmichel: doubt
06:45 PM Loetmichel: like V bot or "fishtail mill bits
06:45 PM jthornton: if you have a touch sensor why do you use a dowel?
06:45 PM drdoc: yeah, I was thinking you'd need to have a horizontal sweep
06:46 PM jthornton: seems like a oxymoron
06:46 PM * Tom_L goes to relax a while
06:47 PM drdoc: jthornton: were you asking me?
06:47 PM * drdoc is easily confused
06:47 PM jthornton: so am i
06:47 PM jthornton: forgot to look at the names lol
06:47 PM drdoc: lol
06:49 PM drdoc: I don't have a touch sensor
06:49 PM jthornton: it's late, I'm tired lol 04:30AM comes fast
06:49 PM drdoc: yes, yes it does
06:49 PM Loetmichel: drdoc: what machine do you have?
06:49 PM drdoc: Loetmichel: my private name for it is Kaizenator II
06:50 PM Loetmichel: gantry router? Selfbuilt?
06:50 PM drdoc: yes
06:50 PM jthornton: Tom_L, did you find a ramp for a pocket?
06:50 PM drdoc: one of my friends works for a Japanese company in an american plant
06:50 PM Tom_L: jthornton, no i've been wasting my time on this silly install
06:50 PM Loetmichel: then consider turning/milling a small plastic "Puck" with an aluminium insert and a connected wire to the alu insert
06:50 PM jthornton: lol
06:51 PM Tom_L: might look at the path command more after a shower
06:51 PM drdoc: He named my 3D printer "Kaizenator" a couple of years ago
06:51 PM jthornton: I'm about to turn on the magnet in the couch lol
06:51 PM drdoc: heh
06:51 PM Loetmichel: go with the wire to a free pin on your PC, place the "probe" on top of your workpiece, start a "offset find run" on z
06:51 PM Loetmichel: done
06:52 PM drdoc: I did some reading about "kaizen" and decided it was a compliment
06:52 PM Tom_L: mine is on high, i just haven't come close enough to it
06:52 PM Loetmichel: the moment the tool touches the alu plate the steppers stop
06:52 PM drdoc: Loetmichel: that whole idea makes me vibrate
06:52 PM Loetmichel: i would recommend to check if your collet has continuity to the PC ground
06:52 PM jthornton: https://forum.freecadweb.org/viewtopic.php?t=14729
06:52 PM Loetmichel: drdoc: vibrate?
06:52 PM Loetmichel: why?
06:53 PM drdoc: my instinct screams "Sparks!!! BURNED cutting edge!!!!"
06:54 PM drdoc: it doesn't matter whether that's rational or not
06:55 PM Loetmichel: drdoc: current from an 100K pullUp resistor to 5V is less than a mA
06:55 PM drdoc: it doesn't matter whether that's rational or not
06:55 PM Loetmichel: no sparks there
06:55 PM drdoc: :-)
06:55 PM andypugh: Very _small_ sparks there. There are always sparks…
06:56 PM drdoc: andypugh: micro-pitting!
06:56 PM Loetmichel: if you are having an anxiety attack: just fit a ressistor or two in between probe and PC ;)
06:56 PM drdoc: or, you know
06:56 PM drdoc: keep using a piece of paper
06:57 PM Loetmichel: or that, sure
06:58 PM andypugh: As lomng as it is a calibrated piece of paper
06:59 PM drdoc: I'd *love* to have a dial-gauge puck
06:59 PM drdoc: andypugh: the paper is a lot more consistent than I am
07:01 PM drdoc: as long as mitutoyo is getting $250+ for their zero gauges, I'm SoL
07:01 PM andypugh: Try eBay
07:01 PM drdoc: I need a job first
07:01 PM andypugh: (Though I am not sure what devices you are talking about)
07:02 PM andypugh: Ah, yes, “get a job, hippy”
07:02 PM andypugh: Does that help?
07:03 PM drdoc: yes, thank you so much!
07:04 PM drdoc: https://www.grainger.com/product/MITUTOYO-Balanced-Reading-Zero-Setter-54GF31
07:04 PM drdoc: that device
07:04 PM andypugh: What are you looking for? Do you actually have a doctorate, or is that just a nickname?
07:04 PM drdoc: although we ignore Grainger's pricing
07:04 PM drdoc: it's a nickname from my teens
07:05 PM drdoc: I'd like to find a CAD job that's not HVAC
07:05 PM drdoc: but I'd settle for going back into IT
07:05 PM andypugh: OK. I was about to say that having a PhD does make it hard to find a job if all you want is _any_ job.
07:06 PM drdoc: I'm kind of in that boat
07:07 PM drdoc: my unix admin resume is extremely specialized in advanced stuff and extremely broad in general work
07:09 PM drdoc: my last IT job involved FreeBSD, beta versions of Solaris, HP/UX 10.20 (circa 1996), HP 83000 IC test mainframes, some simple Windows programming, and an in-house iSCSI imaging and NAS service
07:09 PM andypugh: But, whereas that device is lovely, for a CNC machine one of these would be just as good: https://www.ebay.co.uk/itm/Alloy-CNC-Engraving-Machine-Tool-Touch-Sensor-Automatic-Setting-Setter-Accs/202783696363
07:09 PM andypugh: Where are you based?
07:10 PM drdoc: Austin
07:11 PM andypugh: Ah. I had a feeling you were in the UK, and was going to suggest asking a friend of mine at UCL.
07:11 PM drdoc: why does that thing have a PtC connector?
07:11 PM andypugh: Air purge?
07:12 PM andypugh: (if you mean the pneumatic connector)
07:12 PM andypugh: To clean the tool and the sensor
07:14 PM drdoc: yes, Push-to-Connect
07:14 PM drdoc: and that makes sense
07:15 PM drdoc: I like this:
07:15 PM drdoc: https://www.amazon.com/dp/B07YCMCF4D
07:16 PM drdoc: I like that they're all going with wannabe Pelican cases
07:17 PM andypugh: Yes, but, with an electrical one, you can set up LinuxCNC to probe every tool on tool change, and the result will be accurate to your machine limits without you having to do any thing at all.
07:18 PM drdoc: there's that
07:20 PM drdoc: holy crap
07:20 PM drdoc: https://www.amazon.com/TB67S109-Stepstick-Heatsink-Compatible-Definition/dp/B07QFLG2NZ
07:20 PM drdoc: that's the chip those "upgraded 1/32 microstep TB6600" drivers use, isn't it?
07:21 PM andypugh: That seems astonishingly expensive
07:22 PM drdoc: Zamtac sells a lot of 3D printer parts at a huge markup
07:23 PM drdoc: if you look at their AMZ listings it's almost funny
07:23 PM drdoc: still
07:23 PM drdoc: doesn't that chip run super hot?
07:23 PM Tom_L: jthornton, too bad we can't just add the .py files in
07:23 PM drdoc: seems like a bad candidate for that form factor
07:23 PM andypugh: https://www.pololu.com/product/3730
07:24 PM andypugh: if rene_dev_ is still awake he might be able to say what he uses in his stepper drivers?
07:25 PM drdoc: hrmm
07:25 PM drdoc: that Pololu board is interesting
07:26 PM drdoc: the Internet says that chip runs cleaner than the TB6600, just not as much available current
07:26 PM drdoc: and slower input, iirc
07:26 PM drdoc: sorry, I meant the TB67s109
07:32 PM rene_dev_: andypugh drdoc powerstep01
07:32 PM rene_dev_: drdoc TB6600 is old utter junk
07:35 PM andypugh: Is that available in any off-the-shelf board that you know of? 85V 10A is way more than most packaged drives offer
07:36 PM drdoc: rene_dev_: no argument
07:37 PM rene_dev_: there isnt a single spec on the TB6600 that is any good.
07:38 PM rene_dev_: andypugh unfortunately not yet.
07:38 PM drdoc: rene_dev_: what about the TB67S109? I'm running software stepping, parallel port, and right now 1.5A NEMA 17 motors
07:38 PM rene_dev_: andypugh we are running them at 60v 6A
07:38 PM drdoc: and my cash flow is very limited
07:39 PM drdoc: anything that would run the motors cooler than the A4988s I have now would be a, uh... step up
07:39 PM rene_dev_: if you are running on parport TB6600 is probably the right choice.
07:40 PM drdoc: heh
07:40 PM drdoc: I keep reminding myself that for right now, that machine is a toy, not a tool
07:40 PM drdoc: and I need to budget for it as such
07:41 PM drdoc: rene_dev_: thanks for the input
07:41 PM drdoc: andypugh: and you too
07:41 PM rene_dev_: the trinamic drivers are also very good
07:42 PM rene_dev_: but its hard to get good performance out of the parport with any drive, so it doesnt make a big difference.
07:42 PM rene_dev_: unless you get a digital one, which is expensive
07:42 PM andypugh: No driver will run the motors cooler if it drives it correctly.
07:43 PM andypugh: Some do reduce the curent when the motor is not moving. But I would take some convinving to believe that that is the correct thing to do.
07:43 PM drdoc: same here
07:43 PM rene_dev_: not true, in the powerstep board we use different current settings depending on movement
07:43 PM drdoc: for a 3D printer, yes
07:44 PM drdoc: but on a mill or router, you don't want a motor freewheeling
07:44 PM rene_dev_: they dont freewheel
07:44 PM andypugh: Go on then, convince me :-(
07:44 PM rene_dev_: even with little current, they still have plenty holding power
07:44 PM rene_dev_: torque
07:44 PM andypugh: (That was the wrong emoticon)
07:45 PM andypugh: Isn’t the torque pretty much equal to current?
07:45 PM rene_dev_: there is a base current, and 2 multipliers, one for acc/decelerating, and one for constant speed movements
07:45 PM andypugh: Or do you need more to step between poles?
07:45 PM rene_dev_: multipliers are usually about 2-3
07:45 PM drdoc: the motors may just be too underpowered for the mass they're moving
07:46 PM rene_dev_: it is, but during standstill you dont need torque
07:46 PM rene_dev_: not much anyway
07:47 PM andypugh: That probably depends on the application. A millling machine might need the same holding force to resist the cutting force, even if it is not moving in the cutting force direction
07:49 PM rene_dev_: yes, but the torque isnt constant, as it decreases with speed, because the max current decreases due to bemf
07:49 PM rene_dev_: unless you are running very slow
07:49 PM drdoc: rene_dev_: don't all the TMC drivers max out at around 1.5A sustained?
07:49 PM rene_dev_: I dont know :D I used them in a 3d printer, and was happy
07:49 PM drdoc: I know the TMC2100 was rated at 2A max
07:50 PM drdoc: heh
07:50 PM andypugh: Doesn’t the drie compensate for BEMF by running constant current / variable voltage?
07:50 PM rene_dev_: the powersteps we use with nema34 at 6A 60v
07:50 PM drdoc: I'm eventually going to have to replace the DRV8825 clones in my printer
07:50 PM rene_dev_: yes, but there is a limit
07:50 PM rene_dev_: and eventually the current is limited by the speed
07:50 PM drdoc: crap
07:50 PM rene_dev_: true for all motors
07:50 PM drdoc: who let it be 8:00?
07:50 PM andypugh: Yes, but that limit is supply voltage, isn’t it?
07:51 PM drdoc: later, gents
07:51 PM drdoc: thanks again
07:51 PM andypugh: It’s 0145 for me and 0245 for Rene..
07:51 PM rene_dev_: yes
07:51 PM rene_dev_: but you hit that sooner than you think
07:52 PM drdoc: it's nowhere near bedtime, but my babe gets pissy if I run the Foredom after 9:30 or 10
07:52 PM drdoc: so I need to get busy
07:53 PM rene_dev_: unless you run in field weakening mode, which they dont do
07:53 PM andypugh: Not a test I have done, but I expect you can measure BEMF with a cordless drill anf multimeter.
07:54 PM andypugh: Though perhaps the square waves when driving shift that down?
07:54 PM andypugh: I don’t care :-) I doubt I will use any more steppers.
08:02 PM Erhu is now known as Iam_Borg
08:06 PM andypugh: Night all
08:22 PM jymmmm: The lights are on but nobody's home :)
08:32 PM jymmmm: Ok, it was a break in the 24ga SOLID wire. Now trying to figure out some sort of strain relief as it's a special connector so this doesn't happen a 3rd time. I even had stapled everything down last time. ARGH
10:21 PM drdoc: jymmmm: splice a pice of 18ga stranded in as close to the connector as you can get
10:21 PM drdoc: piece
10:21 PM drdoc: ugly, functional workaround
10:24 PM pink_vampire: drdoc: there is nothing wrong with it
10:28 PM CaptHindsight: I would completely redesign and use connectors with strain relief as not shown in this pic https://postimg.cc/7bqwTvvy
10:29 PM CaptHindsight: otherwise known as "Chinese" strain reliefs
10:30 PM pink_vampire: CaptHindsight: my HF spindle use the same connector
10:30 PM CaptHindsight: did they also avoid the use of the strain relief?
10:30 PM pink_vampire: let pate a picture of the cable that I made
10:31 PM pink_vampire: pate LOL **take**
10:35 PM pink_vampire: CaptHindsight: https://i.imgur.com/jrt1SzL.png
10:36 PM jymmmm: drdoc: I ended up using CAT3 to splice into the thin stuff, then stapled that down. the outter jacket will prevent more cuts
11:10 PM samsagaz: im building a small CNC machine but using nema23 and ballscrew SFU1605 (in z axis). Dont know if the GT2 10mm width will be ok to move the Z axis ballscrew, will use Ratio 1:2 (20T / 40T) Someone know if will work with the GT2, or is better to purchase another profile and maybe 15mm width? Machine will be for PCB prototyping, so noneed too much torque.
11:11 PM pink_vampire: samsagaz: ball screw for the Z axis is a good idea
11:12 PM samsagaz: yes i think
11:12 PM samsagaz: just need to find the right belt profile
11:13 PM pink_vampire: why belt?
11:14 PM samsagaz: well, i want gear reduction
11:14 PM samsagaz: 1:2 or 1:3
11:14 PM samsagaz: so i use two pulleys
11:14 PM samsagaz: one in the motor and other in the ballscrew
11:14 PM pink_vampire: waste of time
11:15 PM pink_vampire: it can add more slope
11:15 PM CaptHindsight: lower speed, more torque, higher resolution
11:15 PM pink_vampire: what is the spindle?
11:16 PM CaptHindsight: https://www.sdp-si.com/products/details/timing-belt-detail.php
11:17 PM pink_vampire: CaptHindsight: at the cost of the Pulleys and the belt, it is better to just use name 34 stepper for the Z if you need more torque
11:18 PM CaptHindsight: https://www.sdp-si.com/products/timing-belts/gt2.php
11:18 PM samsagaz: well, spindle is a chinese 500w one. 12000RPM, 48V DC. the crap ones :/
11:18 PM samsagaz: well i want lower speed in Z
11:18 PM pink_vampire: you will be fine with direct drive
11:19 PM CaptHindsight: https://www.sdp-si.com/products/Timing-Belt-Pulleys/index.php
11:20 PM pink_vampire: samsagaz: on my servo spindle I have xl belt
11:20 PM CaptHindsight: what if you don't have room for a nema34 stepper?
11:20 PM samsagaz: i want to use nema 17 or nema 23, will build two machines
11:21 PM CaptHindsight: I have used nema23 and timing belts and pulleys to double the step count per rev and double torque
11:22 PM samsagaz: CaptHindsight, well that was my idea, want to purchase 20T for the stepper and 40T and 60T for the ballscrew
11:22 PM samsagaz: but know thinking about direct drive too
11:22 PM samsagaz: :/
11:22 PM CaptHindsight: I doubled the steps with a 0.9 deg motor to 800 steps per screw rev
11:22 PM samsagaz: will need about 2 more centimeters in the machine
11:23 PM samsagaz: nice :)
11:23 PM pink_vampire: samsagaz: xl belts design for more torque
11:23 PM samsagaz: i want to use nema 17 to use 0.9 deg motors too
11:23 PM samsagaz: you think that GT2 will be not enought ?
11:24 PM pink_vampire: no idea, look to flimsy to me
11:24 PM samsagaz: trying to build something very precise
11:26 PM samsagaz: https://ibb.co/558tYcZ
11:26 PM samsagaz: this is the drawing of the Z axis
11:26 PM pink_vampire: on my spindle, I have name34 servo motor, and XL belt 3/8"
11:26 PM pink_vampire: precise = direct drive
11:29 PM pink_vampire: samsagaz: my C axis https://i.imgur.com/eK5MAc6.png
11:30 PM samsagaz: i dont need to big motors :) the travel of Z axis will be just 40mm
11:31 PM samsagaz: i want to use it to PCB prototype
11:31 PM samsagaz: and maybe some light alum routing
11:32 PM pink_vampire: at the end, you just buy pulleys and replace them to get the torque that you want.
11:35 PM pink_vampire: on my C axis i had 1:1 60 to 60 pulleys because that what I had here on hand (free), so i got the XL belt for them and did some test cuts, and after that I decide that I want more torque, so I got 20 tooth pulley and smaller belt, and now I'm happy with it.
11:36 PM pink_vampire: so, start cheap, see how it is go, see if you like it, leave some room to try it in direct drive, and see how it is feel.
11:37 PM pink_vampire: also make sure you design a way to apply tension on the belt.
11:38 PM samsagaz: thanks for the tips pink_vampire
11:38 PM pink_vampire: to make something right you need to try it and refine it over time.
11:38 PM samsagaz: adding a few holes for the direct drive
11:38 PM pink_vampire: you can even 3d print some pulleys
11:39 PM samsagaz: dont want to use any printed part :/
11:39 PM pink_vampire: 100% infill PLA, is very strong.
11:39 PM samsagaz: will test it then :)
11:39 PM pink_vampire: I mean just to test what size you need
11:40 PM pink_vampire: the 60 tooth pulleys on my spindle is about $50 each
11:40 PM samsagaz: 40T and 60T pulley are just 4-5 US dollars in Aliexpress
11:40 PM samsagaz: will purchase one of each size
11:40 PM pink_vampire: you mean the gt2?
11:41 PM samsagaz: the bore of the stepper is 6.25mm, so is a cheap GT2 pulley
11:41 PM samsagaz: yes
11:41 PM samsagaz: all the sites that i read say that GT2 are the best belt :/
11:41 PM pink_vampire: best for light load.
11:44 PM pink_vampire: samsagaz: 3d printed gear on my lathe https://i.imgur.com/W1FiRO3.png
11:44 PM samsagaz: wow
11:45 PM samsagaz: incredible
11:45 PM samsagaz: is a simple PLA?
11:45 PM pink_vampire: yes, pink PLA 100% infill
11:48 PM pink_vampire: it is 40T or 42T gear I know it was not easy to find, but mcmaster share a 3d model of it, so a bit of solidworks, and it was ready to print
11:48 PM pink_vampire: it is almost a year, and it is still work fine
11:49 PM samsagaz: amazing
11:49 PM pink_vampire: for almost free gear YEAH
11:50 PM samsagaz: :)