#linuxcnc | Logs for 2019-09-24

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[00:01:21] <jesseg> Interesting. These Accelerated Designs PCB footprints don't seem to indicate whether the part should be a U1, X1, R1, C1, L1, etc.
[00:01:46] <jesseg> that or I'm an idiot.
[00:01:55] <jesseg> Oh, yeah, the latter is the case.
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[00:10:00] <jesseg> dirty bastards... Why do they put global vital data at the end of the file? Now my convert has to either buffer the whole thing, or read it off disk twice just so it can convert it :P
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[04:17:00] <Deejay> moin
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[04:24:59] <jesseg> Mornin'
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[05:40:11] <pink_vampire> hi
[05:41:04] <XXCoder> hey
[05:41:53] <pink_vampire> I need an advice about rails for the long axis
[05:42:35] <pink_vampire> I was thinking about getting a 20mm rod rail with support, but then I saw this thing
[05:42:37] <pink_vampire> https://www.ebay.com
[05:43:03] <XXCoder> damn thats so cheap now
[05:43:20] <pink_vampire> yeah, it is not THK or Hiwin, but it ismuch better then round rails
[05:43:28] <XXCoder> yeah sbr isnt as good
[05:46:37] <pink_vampire> I'm uploading a picture of the design that I did so far.
[05:48:12] <pink_vampire> https://i.imgur.com
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[05:48:52] <XXCoder> plan to machine em? or print
[05:49:13] <pink_vampire> all the yellowish color is pla parts
[05:49:48] <pink_vampire> also the green part
[05:50:10] <XXCoder> i see youre using insert nut
[05:50:27] <pink_vampire> design to be very easy to print and very stiff
[05:50:29] <XXCoder> definitely stronger than melt insert bolt thing
[05:52:35] <pink_vampire> all the linear rails bearings are hold in place with retention rings. so no screw and nuts that can become loss with vibrations. and also much much cheaper
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[05:53:23] <XXCoder> wouldnt that also introduce backlash unless rings is very tight against part its retaining?
[05:53:54] <pink_vampire> the rails for the Z axis are 12mm with 4 linear rails bearings, but on the Y axis there is 16mm linear rails and 6 bearings
[05:55:02] <pink_vampire> XXCoder: even if it move it can't slip if the belt is hold the actual plastic part in place
[05:55:16] <XXCoder> ahh ok
[05:55:25] <XXCoder> makes sense
[05:56:20] <pink_vampire> and for the X axis (not in the design yet) I'm thinking about those china style hiwin
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[06:01:56] <jym> g'morning
[06:02:07] <pink_vampire> good morning Jymmm
[06:02:56] <XXCoder> yo
[06:04:19] <pink_vampire> jym: did you saw my cnc design?
[06:04:48] <jym> pink_vampire: nuh uh
[06:05:02] <pink_vampire> https://i.imgur.com
[06:05:16] <pink_vampire> that is what I did so far
[06:05:42] <pink_vampire> 12mm round rails for Z, and 16 round rails for Y,
[06:06:07] <pink_vampire> all the yellow and green parts are 3d printed
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[06:08:55] <jym> pink_vampire: Is this a router?
[06:09:05] <pink_vampire> almost
[06:09:22] <pink_vampire> I'm going to use my 60K on it
[06:09:57] <Tom_L> morning
[06:10:23] <pink_vampire> morning Tom_L
[06:10:59] <jym> what is 60K ?
[06:11:15] <pink_vampire> 60K rpm spindle
[06:11:28] <jym> So it will be a router
[06:11:37] <pink_vampire> yeah
[06:11:40] <pink_vampire> not a mill
[06:11:51] <pink_vampire> the Z is just 3in of travel
[06:12:08] <jym> and what will you be cutting material wise?
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[06:13:01] <pink_vampire> it is design to cut soft sheet material like wood, pvc, acrylic, and maybe 1/8" aluminum
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[06:14:11] <pink_vampire> I want to go with belt drive and might add a laser option to it.
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[06:15:03] <jym> pink_vampire: The thought that comes to mind is y rail deflection
[06:15:39] <pink_vampire> what do you mean?
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[06:18:12] <jym> pink_vampire: Well, if you take a cut in hardwood, the force might bow/flex the Y rails
[06:18:36] <pink_vampire> I see what you mean
[06:19:00] <pink_vampire> do you have an idea how to solve it?
[06:20:02] <jym> Using round rails, I don't. But you could use a deflection claculator and see how much force can be applied without flexing
[06:20:51] <pink_vampire> I'm trying to make it as 3d printed and cheapest possible
[06:23:17] <jym> WEll, less depth of cuts, and MUCH slower travel
[06:23:46] <jym> Good, Fast, Cheap, pick any two =)
[06:24:03] <pink_vampire> I want to make it with very high feed rate, so the depth of cut will be dust
[06:25:34] <jym> dust?????
[06:25:52] <pink_vampire> very very small chip load
[06:26:21] <jym> So you don't mind running a project overnight?
[06:26:47] <pink_vampire> I want it to work as "good" as the g0704"
[06:27:31] <jym> So you don't mind running a project overnight?
[06:27:44] <pink_vampire> 0.5mm DOC in aluminum work fine
[06:27:51] <jym> 6 to 9 hours?
[06:27:54] <pink_vampire> why over night?
[06:28:37] <jym> Wuth such shallow cuts, you might have a LOT of passes
[06:28:40] <pink_vampire> 6 passes for for 2d parts, that will be almost like jigsaw speed
[06:29:34] <jym> okey, fair enough.
[06:30:20] <pink_vampire> it is not going to be the next datron, it is design to a price point
[06:30:45] <syyl> so are datrons
[06:31:35] <pink_vampire> any router is better than cut something on the g0704 in 10 setups just because I can't fit it on the table.
[06:36:03] <pink_vampire> OMFG!
[06:36:18] <pink_vampire> 19mm displacement!
[06:36:44] <pink_vampire> this is not make sense at all
[06:37:53] <pink_vampire> KN is not N
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[06:40:33] <pink_vampire> https://i.imgur.com
[06:40:58] <pink_vampire> any idea how to fix that?
[06:41:08] <jthornton> morning
[06:41:22] <XXCoder> the forward push?
[06:41:23] <pink_vampire> hi jthornton
[06:42:15] <pink_vampire> XXCoder: there is 700mm end to end, and 4kg of force down on the spindle mount
[06:42:33] <XXCoder> looks like arounbd .17mm
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[06:43:06] <pink_vampire> the spindle is about 4kg or so.. and the cutting force is almost nothing..
[06:43:32] <pink_vampire> so I did the simulation for 4kg just to get an idea
[06:43:38] <XXCoder> im not an engineer not too sure how to correct for that
[06:44:11] <pink_vampire> maybe to add one more rail to the back?
[06:45:42] <pink_vampire> maybe to support the spindle from both ends?
[06:47:31] <jym> What if you used thick Y rails?
[06:47:36] <jym> thicker*
[06:47:50] <pink_vampire> like 20mm?
[06:48:01] <jym> try it in the calculator
[06:49:24] <jym> Morning jthornton
[06:49:29] <jthornton> pink_vampire, use linear rails instead of rods
[06:49:37] <jthornton> morning
[06:50:04] <pink_vampire> jthornton: how to you hold them with printed parts?
[06:51:00] <jthornton> print a bridge
[06:51:19] <jthornton> or use some extrusions
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[06:54:20] <pink_vampire> I'm trying to avoid it
[06:54:43] <pink_vampire> unless you know where I can get them cheap
[06:55:43] <jym> ...and the trucks too
[06:56:00] <XXCoder> does that rail have back plate connecting sides?
[06:56:38] <pink_vampire> https://i.imgur.com
[06:56:57] <XXCoder> doesnt really help it seems
[06:57:14] <pink_vampire> with 3 rail - from 0.19 to 0.15
[06:57:31] <pink_vampire> now I will try to flip it
[06:57:40] <XXCoder> move rear rod upwards a little, and top one forward a little
[06:57:54] <XXCoder> basically none share a plane on any axis
[06:58:15] <XXCoder> top one maybe back a little is better dunno how it'd change stresses
[06:59:13] <pink_vampire> same hardware - https://i.imgur.com
[06:59:36] <XXCoder> interesting.
[06:59:42] <jym> pink_vampire: and 25mm rails?
[06:59:59] <XXCoder> so if you put spindle pressure point though middle of that front part would it split weight between 2 rods?
[07:00:01] <pink_vampire> but it will make the router very hard access
[07:00:15] <pink_vampire> XXCoder: correct
[07:00:39] <pink_vampire> lets see 2 rails original configuration with 25mm,
[07:03:15] <jthornton> 54F
[07:03:28] <jym> pink_vampire: https://www.rollon.com
[07:04:51] <pink_vampire> and after a while it is grind itself to death
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[07:05:54] <pink_vampire> I want some sort of bearings
[07:07:09] <pink_vampire> original design with 2 25 rails. https://i.imgur.com
[07:07:22] <pink_vampire> it is the best so far
[07:07:50] <jym> https://www.bwc.com
[07:08:09] <XXCoder> theres a lot of leverage. can you add tringular side supports on spindle?
[07:09:08] <pink_vampire> jym: I hate those things
[07:10:36] <jym> Just offering ideas that fit with printed parts
[07:11:02] <pink_vampire> 25mm X 700mm round shaft is US $45.99/ea
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[07:13:22] <jym> pink_vampire: Well, you could use skate bearings
[07:14:25] <pink_vampire> I'm looking at 3030 aluminum extrusion
[07:15:48] <jym> pink_vampire: http://1.bp.blogspot.com
[07:16:21] <pink_vampire> jym: I hate it, this is soo ugly
[07:16:41] <pink_vampire> how about 3060 aluminum extrusion with 2 china rail on it?
[07:16:42] <jym> pink_vampire: Like I said... Good, fast, cheap.... pink any two
[07:16:50] <jym> pick*
[07:17:23] <jym> pink_vampire: You could just use 1/4" alum plate and mount the rails on it
[07:18:04] <pink_vampire> but how do you mount the 1/4 plate to the block on the X axis?
[07:18:37] <jym> the same way you mount the round rails you have now
[07:21:23] <pink_vampire> the aluminum extrusions become very cheap
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[12:34:19] <Loetmichel> re at home from sisters house... the workers have moved a wall yesterday and managed to kill the main power cable to the first floor in the process... sister called yesterday totally in shambles... "no light, no cooking..." so i took a day off, drove 250km, 5 hours of fixing electrics, 250km drive back. The things you do for your kin...
[12:38:01] <jdh> my sister would have them get it fixed.
[12:40:51] <Loetmichel> jdh: your sister dosent have a brother that can do it, i assume? ;)
[12:41:16] <jdh> sure, but why?
[12:41:43] <Loetmichel> because thats what brothers for... apparently ;)
[12:42:01] <jdh> that's why you have bonded & insured workers
[12:42:48] <Loetmichel> or pay some guys to get the work done "under the table" because you cant afford it otherwise
[12:43:12] <Loetmichel> german houses are made of stone, not wood... so moving a wall takes a bit of jackhammering
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[14:42:35] <SpeedEvil> A while back I was asking about encoders to measure the stretch of threaded rod under load.
[14:42:51] <SpeedEvil> I just realised that a thread pitch guage may work just fine.
[14:44:12] <SpeedEvil> 1.25mm pitch goes to 1.31@5% stretch
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[15:34:54] <andypugh> SpeedEvil: You could make a very long thread pitch gauge. Operate it like a vernier.
[15:35:13] <SpeedEvil> yeah - that'd work too
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[16:06:55] <CaptHindsight> how goes the RP4 RT kernel work?
[16:07:22] <CaptHindsight> been following the thread on the forums a bit
[16:08:37] <CaptHindsight> I'd work on a solid u-boot port for it first
[16:08:45] <CaptHindsight> shouldn't be that much work
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[16:12:02] <Deejay> gn8
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[17:41:29] <andypugh> Sand-cast a new base for a pewter tankard: https://photos.app.goo.gl
[17:41:47] <andypugh> (Oldest date on there is 1903)
[17:44:25] <Tom_L> glass bottom?
[17:45:29] <andypugh> Indeed.
[17:45:51] <Tom_L> nice
[17:46:00] <andypugh> Afrer machining: https://photos.app.goo.gl
[17:46:28] <andypugh> I will buy some beer and test it tomorrow :-)
[17:46:30] <Tom_L> looks too good for the rest of it :)
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[17:46:46] <andypugh> It will patinate in time.
[17:46:51] <Tom_L> yeah
[17:47:12] <andypugh> Like another 116 years, with luck.
[17:51:17] <_unreal_> you.... been drinking out of that aluminum cup?
[17:51:27] <Tom_L> not aluminum
[17:51:31] <_unreal_> that is alumuminum ya?
[17:51:33] <_unreal_> ahh
[17:51:59] <Tom_L> pewter
[17:59:24] <_unreal_> is it leaded?
[17:59:41] <_unreal_> most old pewter has lead
[18:00:24] <_unreal_> time for a shower
[18:01:05] <andypugh> Pewter hasn’t contained lead for rather a long time.
[18:01:56] <sync> the local engine shop was not able to just grind a single main bearing
[18:02:36] <_unreal_> just did some research for the hell of it. and anything made in china upto the 80's is likekly to have it. and UK anything made after the 50's is less likely to have led
[18:03:25] <andypugh> Tableware-grade pewter has been lead-free in the UK since the 16th century. Acccording to Wikipedia.
[18:03:26] <CaptHindsight> I'm working on the sand mold printers, similar to SLA/SLS only with sand
[18:04:05] <andypugh> We have had one at work for years, though that is sand-layer + binder spray technology.
[18:05:39] <_unreal_> https://ourpastimes.com
[18:05:39] <andypugh> I feel that you should be able to do SLS with the shell-core sand: https://www.haworthcastings.co.uk
[18:06:00] * _unreal_ googles sand mold printer
[18:07:01] <Tom_L> i was trying to find a pic of an old in engine crankshaft grinder for sync but i can't find one
[18:07:10] <Tom_L> wasn't for mains but rod journals
[18:07:33] <Tom_L> you'd turn the crank with the rear wheel
[18:08:02] <andypugh> _unreal_: https://www.youtube.com
[18:08:32] <CaptHindsight> andypugh: SLA uses less energy and is faster and I make my own sand+resin
[18:09:27] <andypugh> I wonder if you could use an IR source to harden the resin
[18:09:28] <andypugh> ?
[18:09:33] <CaptHindsight> I have to finish the STL slicing for LCNC, all the hobby stuff is just way to buggy and slow
[18:09:54] <CaptHindsight> nanoDLP, printrun+projectlayer, etc etc
[18:09:59] <andypugh> CaptHindsight: You have seen my STL slicer?
[18:10:13] <CaptHindsight> yes
[18:10:41] <CaptHindsight> I have to integrate it with LCNC G-code
[18:10:42] <andypugh> I am not claiming that it is any good :-)
[18:11:24] <CaptHindsight> the next big project will be going beyond G-code for 3d printing for full color support
[18:12:35] <CaptHindsight> AMF or similar
[18:12:53] <andypugh> I do feel an urge to make a CMYK extruder.
[18:13:04] <CaptHindsight> https://en.wikipedia.org
[18:13:07] <andypugh> Maybe a job for STEP-NC?
[18:13:17] <_unreal_> andypugh, in the long run I'm just saying I'd suggest at least testing the mug for led. there are a LOT of examples of tainted mugs out there.'
[18:13:42] <andypugh> _unreal_: It’s OK, I have loads of IQ to spare :-)
[18:13:59] <CaptHindsight> break time here, the weather today is near perfect
[18:14:00] <_unreal_> OH.... why didnt ya say so smart ass ;)
[18:14:15] <Tom_L> https://www.youtube.com
[18:14:58] <Tom_L> mostly for old babbit bearings
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[18:15:53] <CaptHindsight> sheesh, try getting all the dust out of that
[18:16:01] <Tom_L> :)
[18:16:14] <Tom_L> i actually used one once on an old ford pickup
[18:16:16] <_unreal_> ya I was thinking if thats upside down.. metal filings and cyclnders?
[18:16:42] <CaptHindsight> it works, just not exactly the best procedure
[18:17:07] <_unreal_> I would do that with an oil/lub wash in the grinding
[18:17:13] <_unreal_> during
[18:18:14] <andypugh> My dad once re-ground a big-end in-situ using only a file and a bent nail as a caliper.
[18:18:44] <_unreal_> heh
[18:19:13] <andypugh> This is even true. He was, at the time, an engineering fitter, so filing to shape and fit was his day job.
[18:19:14] <Tom_L> the rods had those little cup oilers on the bottom of each one
[18:19:28] <Tom_L> as it went around it would dip into the oil
[18:19:39] <andypugh> I know them well.
[18:19:45] <Tom_L> i bet you do
[18:20:45] <_unreal_> back in maine there is an old hit and miss and tractor repair shop.
[18:21:14] <_unreal_> What I always found amazing is how many hit and miss power plants are still used in logging in maine
[18:21:33] <_unreal_> granted I dont live in maine any more but regardless
[18:21:38] <_unreal_> well time for a shower
[18:25:15] <andypugh> Tom_L: In fact, here is a set that I made: https://photos.app.goo.gl
[18:26:08] <Tom_L> for the old fire engine?
[18:26:37] <andypugh> Yes. It only needs 4. Those were a range of sizes to get a good press fit.
[18:30:06] <Tom_L> i bet that ole guy still has that grinder if he's still alive
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[18:43:57] <_unreal_> grinder?
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[18:57:00] * jthornton has been bucking rounds, splitting firewood and burning limbs all day...
[18:58:21] <jthornton> hmm only got to 77F today...
[19:03:13] <tubes4branes> has anyone used the Googol Technology (HK) Limited motion control cards with Linux CNC?
[19:08:09] <jthornton> hmm need to figure out how to do a seamless transfer of all my email addresses from webhost4life to dream host...
[19:12:54] <skunkworks> what a mess... http://electronicsam.com
[19:13:55] * jthornton clicks with no care about bandwidth...
[19:14:12] <skunkworks> Go for it!
[19:14:30] <skunkworks> (it is 3.2mb)
[19:14:36] <jthornton> cable management is always an issue
[19:14:51] <t4nk-freenode> lol... /me had already decided Not to click out of bandwidth concerns ;)
[19:14:51] <skunkworks> I just threw the pi in there...
[19:15:14] * jthornton checks how much bandwidth is left
[19:15:43] * t4nk-freenode should have plenty for the day left.. bout 5G
[19:16:05] * jthornton only has 10GB a month
[19:16:22] <jthornton> and I have 2.7GB extra left today
[19:16:39] <t4nk-freenode> u serious? I have 'unlimited 4g' .. which means I get 5G a day
[19:16:44] <jthornton> what's on the thumb drive?
[19:17:04] <jthornton> I live on a dead end dirt road off of a dirt road...
[19:17:16] <Tom_L> in a swamp
[19:17:29] <t4nk-freenode> hehe watch your step there Tom_L
[19:17:45] <skunkworks> jthornton: the config that I copied over for the green machine.
[19:18:32] <jthornton> the swamp is a few miles away where the prehistoric grinnels live
[19:18:40] <skunkworks> jthornton: this is following your directions..
[19:18:50] <jthornton> yikes!
[19:19:42] <jthornton> skunkworks, what machine is that?
[19:19:58] <jthornton> ohh a STMBL too
[19:21:05] <skunkworks> yes - a mishmash of componants.. :)
[19:21:18] <skunkworks> Other than I am only isolating 1 core..
[19:21:57] <jthornton> didn't I isolate 1 core?
[19:23:07] <skunkworks> you did isolcpus 1,2,3
[19:23:19] <jthornton> I thought I did...
[19:23:40] <skunkworks> I am doing just isolcpus 3
[19:24:05] <jthornton> yea I did add that to my cmdline.txt file
[19:24:05] <skunkworks> it seem to me the userland gets just too slow with only 1 core
[19:24:15] <jthornton> along with a bunch of other things
[19:24:57] <jthornton> how much memory does your rpi4 have
[19:24:57] <skunkworks> yeh - i used your line other than the isolcpus
[19:25:02] <skunkworks> 4gb
[19:25:27] <skunkworks> it seems fine as long as you don't run youtube. I will play with it for a while
[19:25:33] <jthornton> same as me, I've not had a monitor or keyboard connected since installing
[19:26:00] <jthornton> quiet splash lapic noxsave acpi_osi= isolcpus=1,2,3 idle=poll acpi_irq_nobalance noirqbalance vmalloc=32MB clocksource=acpi_pm net.ifnames=0
[19:26:03] <skunkworks> the stmbl is running the spindle through spart serial
[19:26:08] <skunkworks> or smart
[19:26:13] <jthornton> cool
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[19:37:20] <_unreal_> @#$%@#$@ ass whole software
[19:37:31] <_unreal_> just figured a way around something
[19:37:38] <_unreal_> what a pain in the as
[19:37:39] <_unreal_> ass
[19:43:31] <_unreal_> or now
[19:43:33] <_unreal_> not
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