#linuxcnc | Logs for 2019-02-04
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[00:16:36] <CaptHindsight> wrought
[00:16:57] <XXCoder> hey
[00:17:18] <CaptHindsight> did you wrought today?
[00:19:26] <XXCoder> nah lazy day
[00:19:34] <XXCoder> watched superbowl then star trek
[00:20:34] <CaptHindsight> https://twitter.com hah nice ad
[00:22:12] <CaptHindsight> worked through the game, looking over the commercial highlights now
[00:27:00] <XXCoder> handmaiden game?
[00:28:53] <CaptHindsight> https://youtu.be
[00:29:05] <CaptHindsight> The Elevator | 2019 Super Bowl Commercial
[00:35:25] <XXCoder> its amazing that they broke record on lowest score on superbowl
[00:35:27] <XXCoder> 13/3
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[01:02:46] <SpeedEvil> XXCoder: 4 1/3
[01:02:59] <XXCoder> lol
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[01:41:16] <XXCoder> nice video https://www.youtube.com
[01:41:43] <XXCoder> curve milling as ugly as sin tho]
[01:42:01] <XXCoder> in least they ciuld clean it up afterwards
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[02:38:48] <CaptHindsight> https://imgur.com
[02:42:00] <XXCoder> new bad obession video!
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[02:47:31] <Deejay> moin
[02:47:44] <XXCoder> yo
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[04:18:17] <selroc> log
[04:18:17] <russian_troll> selroc: Today's Log http://www.isaeff.net
[04:18:18] <c-log> selroc: Today's Log http://tom-itx.no-ip.biz:81
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[05:39:16] <jthornton> morning
[05:45:30] <XXCoder> hey jthornton its snowing here lol
[05:45:38] <XXCoder> actually a inch thick. major nosw
[05:45:39] <XXCoder> snow
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[05:55:24] <jthornton> wow
[05:55:37] <XXCoder> heh bet its just little snow to you :)
[05:55:58] <XXCoder> im wondering if places will close tomorrow, but then we have hefy snow equipment due to east washington being more snowy
[05:56:50] <jthornton> snow can be bad if people are not used to driving on it
[05:57:02] <XXCoder> yeah lucky im pretty good anyway
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[06:33:52] <Tom_L> 44°F Lo 29
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[06:52:00] <jthornton> morning
[06:53:25] <XXCoder> 31f snowing
[06:53:45] <XXCoder> looks like it MIGHT snow again this friday. pretty amazing
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[07:10:21] <Loetmichel> gnihi... my apprentice has to make a 24" TFt display for a customer. Bad: the monue button PCB doesent fit the new Enclosure... Now the apprentice has a crash-course in Target3001 (PCB CAD) and Insulation milling on the CNC 6040 ;)... but i doubt that he remembers any of my "turbo-explaining" ;)
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[08:05:23] <jthornton> https://forum.linuxcnc.org
[08:06:08] <XXCoder> man
[08:06:11] <XXCoder> 'i am loving that ui
[08:06:25] <jthornton> thanks
[08:07:00] <jthornton> I put the -0.250 and 0.250 on the set offset because my dowel in the spindle is 0.500"
[08:07:35] <jthornton> I need to update the image lol
[08:13:59] <XXCoder> :)
[08:15:32] <jthornton> https://github.com
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[10:11:46] <jesseg> hey guys, I noticed something very interesting with a liquid level. If your shop is cold and you touch one end of the liquid vial, the bubble immediately starts moving toward your warm finger...
[10:12:24] <jesseg> Shining an led flash light or green laser pointer on one end of the vial can do the same thing
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[10:15:35] <jesseg> It must either be due to the vial expanding and kind of dome-ing up or the fluid warming up and becoming less dense
[10:26:06] <SpeedEvil> yes. Don't do that.
[10:26:23] <SpeedEvil> The shape of the vial is very very carefully controlled.
[10:26:48] <SpeedEvil> And also thin.
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[10:38:04] <Loetmichel> depends on how sensitive the level is i presume, jesseg
[10:38:41] <Loetmichel> the usual "construction" levels are pretty coars. i doubt you would get that kind of reaction to temperature with them
[10:39:53] <SpeedEvil> I should try it on my starrett master precision level.
[10:40:02] <SpeedEvil> Alas, I don't own one.
[10:40:17] <Loetmichel> a machine level however is usually good for a single mm per meter inclination measurement... meaning that the slightes "encouragement" in form thermal expansion or currents inside the liquid is enough to move the bubble
[10:41:02] <jesseg> Loetmichel, I dunno, you might be surprised. I first noticed on a 1-arc-minute per div level on a theodolite, but then I tried it on the round all-direction roughing level which is 8 arc-minutes per div, and it even showed drastic behavior
[10:41:39] <jesseg> actually there might be a construction level around here... lemme go look.. LOL
[10:41:45] <Loetmichel> interesting
[10:42:09] <Loetmichel> i would have thought that the coarse ones would have enough "byoancy" to counteract those effects
[10:42:26] <jesseg> yeah
[10:42:44] <jesseg> well can't find the construction level
[10:43:11] <Loetmichel> <- has proven in experiment that SOME levels still have glass vials in them
[10:43:25] <jesseg> lol
[10:43:31] <jesseg> *had* glass in them :P
[10:43:37] <Loetmichel> <- had to pick the shards out of his face after it came in close contact with a hot air gun ;)
[10:43:45] <jesseg> oh ouch.
[10:43:46] <Loetmichel> indeed, HAD
[10:44:14] <Loetmichel> simply exploded like those sprinkler nozzle vials ;)
[10:44:33] <jesseg> did you notice how small the bubble got before it went?
[10:44:37] <Loetmichel> <- needs glasses to see anything, so no harm done ;)
[10:44:46] <Loetmichel> nope, was too fast
[10:44:49] <SpeedEvil> I have wondered about simply adding some glass over, and backlighting.
[10:44:53] <Loetmichel> i imaigine it disappeared
[10:45:23] <Loetmichel> the bubble i mean
[10:45:36] <jesseg> I dunno, the bubble is a significant portion of the volume
[10:45:59] <Loetmichel> only problem was that the shards were SO small that it took quite a while and some searching to get them out of the skin
[10:46:16] <Loetmichel> looking for the blood trickles worked pretty well though ;)
[10:46:36] <Loetmichel> s/trickles/spots
[10:47:11] <Loetmichel> could also be that the vial simply exploded because of overpressure and some pretension relaxing
[10:47:19] <Loetmichel> because of inhomogen heating
[10:47:32] <Loetmichel> (bubble heats up faster than the rest of the vial)
[10:48:00] <jesseg> right
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[10:48:03] <jesseg> I suspect that
[10:48:19] <jesseg> probably over all increased pressure plus a super hot spot where the bubble was
[10:48:31] <Loetmichel> like the classic "freshly cleaned beer glass with thick bottom" that has said bottom fall out the moment you put cold beer in
[10:49:18] <Loetmichel> been there had that... including my dumb face
[10:49:45] <Loetmichel> and the wet feet ;)
[10:50:27] <Loetmichel> the friends at the hobby bar literally went ROTFL when they saw my "WTF" look
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[10:53:53] <jesseg> lol
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[11:12:14] <Jymmm> Loetmichel: Hot Beer + Cold Mug???
[11:13:05] <Loetmichel> Jymmm: mug fresh from the dish washer, thick bottom glass still at about 80°C... and 8°C beer :-)
[11:13:59] <Loetmichel> https://images-na.ssl-images-amazon.com <- THAT kind of mug
[11:14:14] <Loetmichel> the thick bottom holds temperature quite well...
[11:14:24] <Loetmichel> the bottom fell clean off
[11:14:30] <Loetmichel> :-)
[11:14:38] <Loetmichel> AFTER i filled it of course
[11:17:39] <Jymmm> Loetmichel: Again, why would you put COLD beer into a HOT glass????????
[11:17:59] <Loetmichel> I didnt notice that the bottom still was hot
[11:18:08] <Loetmichel> the handle was already at room temp
[11:18:12] <Jymmm> Loetmichel: Ah, gotcha
[11:18:36] <Jymmm> Loetmichel: Don't you frig/freeze your mugs, to keep the beer cold?
[11:18:42] <Loetmichel> no
[11:19:07] <Loetmichel> we had a "feed thru" beer cooler in the living room back then
[11:19:08] <Jymmm> Loetmichel: WHY DA HELL NOT?! you LIKE warm beer?
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[11:19:26] <Loetmichel> and the glasses itself usually didnt last long enough to warm up ;)
[11:19:36] <Jymmm> hahaha
[11:19:36] <Loetmichel> the contents i mean
[11:20:00] <Loetmichel> thats why i know the beer was exaclty 8 °C ;)
[11:20:26] <Jymmm> Fair enough =)
[11:20:42] <Loetmichel> it was an "all men" shared flat ;)
[11:20:43] <Jymmm> Loetmichel: Oh, you know your swimming pool heater???
[11:20:51] <Loetmichel> yes?
[11:21:11] <Jymmm> Loetmichel: I found a replacement for you, no pump needed =)
[11:21:19] <Loetmichel> hmm?
[11:21:28] <Jymmm> Gimme a moment..
[11:22:10] <Loetmichel> s/men/young guys
[11:22:18] <Jymmm> Loetmichel: It's long, but you can FF... https://www.youtube.com
[11:22:58] <Jymmm> Loetmichel: Better... https://youtu.be
[11:23:44] <Jymmm> Loetmichel: Betterer... https://youtu.be
[11:23:57] <Loetmichel> Jymmm: WAY to much work to heat the pool
[11:24:23] <Jymmm> Loetmichel: just uses sticks and twigs
[11:24:34] <Loetmichel> that grill was already there, so was the copper tube and the garden hose and the pump... so it was cobbled together in less than 20 minutes
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[11:24:48] <Loetmichel> it was a "instant" solution
[11:24:59] <Loetmichel> nothing so elaborated as a rocket stove
[11:25:19] <Jymmm> Loetmichel: I get it, just thought of you when I saw that video =)
[11:25:29] <Loetmichel> later in summer i used a 100m hard black plastic garden hose on the garage roof
[11:25:34] <Loetmichel> worked well, too
[11:25:51] <Loetmichel> instead of the grill
[11:25:55] <Jymmm> Loetmichel: Think wood fired hot tub
[11:26:17] <Loetmichel> yeah, those usually have the "rocket stove" submerged into the tub though
[11:26:48] <Loetmichel> have to go now, already nearly 30 minutes overtime... back in half an hour when i am at home ;)
[11:26:55] <Jymmm> Loetmichel: I'd have to see a pic of that.
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[12:12:22] <Loetmichel> Jymmm: pic of what?
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[12:17:44] <Jymmm> Loetmichel: "rocket stove" ___submerged___ into the tub
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[12:22:26] <Loetmichel> Jymmm: i meant a stove that is built in a way that you can fire it from the top and thats submerged in the tub
[12:22:38] <Loetmichel> like in the "pure living for life" videos
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[13:00:39] <SpeedEvil> https://www.youtube.com Another use for vice-grips.
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[13:12:09] <Jymmm> SpeedEvil: best use ever =)
[13:12:23] <Jymmm> SpeedEvil: Especially right next to that steel rail =)
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[13:47:32] <fragalot> SpeedEvil: lol
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[13:56:39] <quqnuss> hello there :-)
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[13:58:16] <quqnuss> pretty much a newbie and have got some questions.
[14:00:51] <gloops> fire away quqnuss, fire away
[14:01:24] <quqnuss> oh thanks .. :-)
[14:02:19] <quqnuss> so first of all, I have played around with lcnc and built a xyz and successfully ran it
[14:03:00] <gloops> excellent if youve got that far
[14:03:27] <quqnuss> now I am trying to make xyzab or xyzac ..
[14:03:48] <gloops> hmm 5 axis
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[14:04:58] <quqnuss> sorry mate .. got to go .. sort of an emergency .. catch you guys later
[14:05:13] <quqnuss> thanks for encouraging replies ..
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[14:05:36] <gloops> mate - either UK or Aus
[14:06:35] <fragalot> scared him off that quick eh
[14:06:45] <fragalot> might be a new record
[14:07:19] <fragalot> I found this old harddisk with photos from pre-2009 that I thought I'd lost forever
[14:07:20] <gloops> i couldnt have helped with 5 axis anyway lol, i was just being polite
[14:07:23] <fragalot> and it still works
[14:07:31] <fragalot> but the copying is only happening at 0.1Mb/s
[14:07:37] <fragalot> ... it's 800Gb.
[14:07:43] <fragalot> this may take a while :D
[14:09:23] <gloops> i bet the little sheets of paper on the interface are going from one side to the either really slowly lol
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[14:10:36] <fragalot> time remaining: 104 days, 17 hours, 42 minutes
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[14:11:29] <gloops> wonder if getright is still going
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[14:25:07] <fragalot> ._. why is this so slow
[14:35:41] <fragalot> 0.03MiB/s
[14:37:15] <gloops> file system on the harddrive?
[14:38:02] <fragalot> seems to be NTFS
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[15:36:11] <CaptHindsight> adding axises is like adding dimensions, you just keep folding
[15:36:37] <CaptHindsight> https://en.wikipedia.org
[15:40:15] <gloops> carl sagans interpretation was ok
[15:41:43] <CaptHindsight> billions and billions
[15:41:44] <gloops> https://www.youtube.com
[15:43:19] <CaptHindsight> I miss that guy
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[16:00:44] <CaptHindsight> https://www.youtube.com not many views
[16:01:06] <CaptHindsight> he's from before the intertubes
[16:02:46] <CaptHindsight> Carl Sagan - Cosmos - Eratosthenes vs The Odd Couple - Password https://www.youtube.com
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[16:52:17] <Deejay> gn8
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[18:24:13] <jthornton> I drove a Honda Insight today and wow
[18:25:00] <Rab> Wow good, or wow bad?
[18:25:07] <jthornton> wow good
[18:25:36] <jthornton> the car drives itself
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[19:14:24] <Tom_L> jthornton, does it talk to you as well?
[19:15:06] <Tom_L> GUI looks good btw...
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[19:19:14] <Valen> is there an updated installer floating around? The linuxcnc website is pushing wheezy which was out of support may last year
[19:23:45] <CaptHindsight> there is, somebody posted the links here the other day
[19:25:07] <CaptHindsight> http://www.linuxcnc.org maybe this, let me see
[19:25:53] <CaptHindsight> https://github.com
[19:27:25] <CaptHindsight> Valen: ^^
[19:27:47] <Valen> CaptHindsight: thanks mate ;-)
[19:28:19] <CaptHindsight> no worries
[19:29:40] <Valen> friend was having issues as dropbox no longer supports the wheezy glibc version
[19:30:22] <Valen> I see some people reporting differeces in latency between rtai and preempt that much of an issue?
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[19:56:46] <CaptHindsight> Valen: RTAI, well properly built RTAI is much faster than preempt_rt
[19:57:52] <CaptHindsight> rtai.org has been difficult for us to work with so we fork everything and build it ourselves
[19:58:32] <CaptHindsight> the LCNC devs don't have time for this so they skipped RTAI on this round
[19:59:02] <CaptHindsight> Valen: it's mostly an issue if you want to software step
[19:59:31] <Valen> that's what the friend wants to use it for
[19:59:35] <CaptHindsight> preempt_rt won't be fast enough for fast stepping
[19:59:56] <CaptHindsight> you won't know until you run the latency tests on the board he wants to use
[20:00:39] <CaptHindsight> some people have gotten <25uS with preempt_rt others are closer to 100K uS
[20:00:58] <CaptHindsight> sorry 100uS
[20:01:09] <CaptHindsight> some worse, some better
[20:01:33] <CaptHindsight> RTAI was usually good unless the board had a flaky BIOS
[20:02:34] <CaptHindsight> the RTAI dev here tried to work with RTAI.org but they didn't cooperate
[20:04:26] <CaptHindsight> and people don't want to pay for RTAI development so it has stalled out again
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[20:18:44] <flyback> linuxcnc should include a micro os for small embedded cpu's
[20:18:49] <flyback> to use for each motor etc
[20:19:08] <flyback> wehen you need timing critical or safety-can-not-fuck-up-ever deadlocks
[20:19:34] <flyback> I agree 100 with linux still being the heart of the cnc and issuing commands etc
[20:19:52] <flyback> just the timing for iching along steppers etc might be better with a dedicated avr per stepper etc
[20:21:13] <flyback> or even linux on small embedded boards like that one mips baord for $5
[20:21:40] <flyback> don't think I am bashing linux saying it's not a good fit
[20:21:42] <flyback> not at all
[20:22:26] <norias> sounds reasonable, on it's face
[20:22:34] <flyback> just for picosecond timing such as a high speed servo or a laser cutter, might want a custom firmware instead of a full os for that piece and have linux then direct it
[20:23:39] <flyback> norias, what part of pa are you in
[20:23:45] <flyback> or wait we talked before didn't we?
[20:23:49] <norias> Pittsburgh
[20:23:58] <flyback> 45 mins from me :)
[20:24:00] <norias> cool
[20:24:10] <flyback> was at allagany general last wednsday all day
[20:24:17] <flyback> dad had heart surgery
[20:24:34] <norias> sorry to hear that
[20:24:39] <norias> i'm assuming it went well?
[20:24:42] <flyback> na he's good they fixed it
[20:24:55] <flyback> they burned out the defective nerve causing the afib
[20:24:57] <flyback> it's done
[20:25:33] <norias> good deal
[20:25:57] <norias> i'm really about 15 / 30 minutes north of the city
[20:26:00] <norias> depending on traffic
[20:26:51] <flyback> besides the fact my idea, they have so many cheap cpu's now it's rediculous
[20:26:58] <flyback> like arm cortex m0
[20:27:06] <flyback> some are no more than a few bucks etc
[20:27:24] <flyback> if you needed one piece of your cnc machine to be picsecond timed
[20:28:03] <flyback> it all just depends on what you are doing I guess
[20:28:12] <norias> i think it's a good point
[20:28:18] <norias> i'll keep it in mind when i get there
[20:28:36] <norias> i'm _slowly_ designing a horizontal cnc milling machine
[20:28:40] <flyback> nice
[20:28:41] <norias> like a mini HMC
[20:28:57] <norias> studying motors and motor controls, right now
[20:29:11] <flyback> I think even a crayon resolution cnc machine is still freaking awesome
[20:29:23] <norias> and sketching some base components to send to foundries for initial rough quotes
[20:29:40] <flyback> norias, don't forget some thermal fuses
[20:29:45] <flyback> and a big "fuckit" red button
[20:29:54] <norias> yeah, definitely an e-stop
[20:30:09] <flyback> themal fuses are like fuses but they melt due to temp not current
[20:30:09] <norias> i basically want to shrink a modern HMC down to desktop size
[20:30:28] <flyback> espically if you use any induction motors which self light when stalled rather quickly
[20:30:32] <norias> i'll likely use some version of linuxcnc for the controller
[20:30:35] <flyback> most fans etc have a thermal fuse inside the winding
[20:30:44] <norias> uh, i might avoid induction motors
[20:30:48] <norias> not sure yet
[20:30:49] <flyback> for when the bearing wears out and they lockup
[20:30:54] <flyback> it melts and cuts the power forever
[20:31:00] <flyback> prevent house fires
[20:31:02] <norias> i want to compete on size and cost with the tormach
[20:31:10] <flyback> they are cheap
[20:31:12] <flyback> pennies I think
[20:31:24] <flyback> in hair dryers, ovens etc
[20:31:25] <norias> i _think_ i need to run on 110 single to do so
[20:31:37] <norias> therfore induction might not be a good idea
[20:31:38] <flyback> please consider some
[20:31:44] <norias> i will, thanks
[20:31:48] <flyback> well induction are a cunt to speed control cheap
[20:31:52] <flyback> you need vfd which is not cheap
[20:32:47] <norias> i plan on about 1/3rd of bom cost being electronics of some sort
[20:33:23] <norias> i might just make it for myself, if no one likes it when i'm done
[20:33:39] <norias> i'm thinking about finding some dumb commodities that can be milled
[20:33:49] <norias> and making those to make some cash
[20:34:19] <norias> motor mounts or standardish brackets
[20:35:38] <CaptHindsight> flyback: how about UEFI for the micro OS, then it could run out of band on your PC and you wouldn't even know it!
[20:36:29] <CaptHindsight> then when you realize that a micro OS needs all sorts of drivers to support well everything in a PC then it's not a micro OS
[20:36:52] <flyback> well the micro os would be for a cpu not capable of running a full os
[20:36:54] <flyback> not on a pc
[20:36:57] <flyback> pc should just use linux
[20:37:10] <flyback> im saying if you use a avr to drive each stepper
[20:37:15] <flyback> then linuxcnc to talk to the avr's
[20:37:22] <CaptHindsight> so a different CNC application that is not LCNC
[20:37:26] <Tom_L> those are available already
[20:37:40] <flyback> well not a full application that is not linuxcnc
[20:37:56] <flyback> im saying just for each motor that needs very fast timing that not normal os will do well at
[20:38:05] <flyback> like for moving a high watt laser
[20:38:09] <CaptHindsight> https://en.wikipedia.org
[20:38:19] <CaptHindsight> flyback take your pic for a RTOS ^^
[20:38:23] <flyback> just for moving the laser head around
[20:38:32] <flyback> linuxcnc tells the whole fixture where to go
[20:38:37] <flyback> where the whole head goes
[20:38:52] <flyback> but for "check sensor, turn on laser pulse, check sensor, turn on laser pulse"
[20:38:59] <flyback> might be good to have a small cpu with a rtos
[20:39:21] <flyback> ugh I suck at explaining what I mean
[20:39:26] <CaptHindsight> good for whom?
[20:39:48] <CaptHindsight> I understand what you are saying just fine
[20:40:03] <CaptHindsight> i just want you to use your noggin a bit harder
[20:40:08] <CaptHindsight> and think it through
[20:40:38] <flyback> I am
[20:40:48] <flyback> it
[20:40:53] <flyback> is not even a os
[20:41:12] <flyback> it's just firmware for that one cricital element piece
[20:41:28] <CaptHindsight> so spaghetti code CNC controller, see reprap
[20:41:57] <CaptHindsight> with the most dyslexic firmware i have ever seen
[20:41:58] <flyback> nevermind
[20:42:03] <flyback> bmcc
[20:42:50] <CaptHindsight> too bad the machinekit devs choose a poor SBC for their first target
[20:43:58] <CaptHindsight> flyback: the proble is the lack of cooperation by those with the skills, those with the skills tend to not have the time required
[20:44:44] <CaptHindsight> so you end up with all the half assed CNC controls
[20:47:05] <CaptHindsight> http://marlinfw.org
[20:49:33] <Valen> flyback: I think you've just described mesa boards?
[20:49:56] <Valen> mesa have a step driver in their setup don't they?
[20:50:03] <CaptHindsight> cannuck yourself
[20:50:28] <flyback> yeah a daugther board
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[20:51:19] <Valen> That'd do the job, and they are off the shelf and cheap enough in their low end one
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[20:51:56] <Valen> hows the integration with the linuxcnc setup gui stuff these days?
[20:51:58] <flyback> or these motion controller they mention for linuxcnc supported
[20:52:00] <flyback> that's all I mean
[20:52:19] <Valen> nah afaik you don't use motion control with mesa and linuxcnc
[20:52:40] <Valen> lcnc does the motion control, the mesa just spits out step pulses at a rate
[20:53:03] <Valen> (altering the step rate in the servo thread)
[20:53:16] <flyback> yeah exactely what I was saying
[20:53:29] <flyback> but since there's already stuff for doing that then my idea is redudant
[20:53:37] <flyback> thx Valen much :)
[20:54:16] <flyback> all I was trying to say was if there wasn't already some kind of mesa board it might be a fun project to make a small os or firmware just for those boards
[20:54:20] <flyback> not needed I guess :)
[20:54:33] <flyback> as a linuxcnc offshoot
[20:55:19] <flyback> not needed, already been done
[20:55:46] <CaptHindsight> mesa has a stand alone motion controller already
[20:55:55] <CaptHindsight> it doesn't work with LCNC
[20:56:02] <flyback> oh
[20:56:23] <CaptHindsight> forget what he calls it
[20:56:44] * flyback upgrades sherlock's kernel
[20:57:02] <CaptHindsight> SOFTDMC
[20:57:04] <flyback> my poweredge 1800 I rebuilt and turned into a dedicated data recovery and archival box
[20:57:19] <CaptHindsight> http://www.mesanet.com
[20:58:55] <CaptHindsight> reprap/makers get all freaked about by mesa cards
[20:59:20] <CaptHindsight> i guess they are supposed to be on sale for less than the cost of manufacturing them
[20:59:30] <Valen> they cost money, and they used to start out costing actual money
[20:59:45] <Valen> people are used to cheap crap from china
[21:00:02] <CaptHindsight> I seen people spend 100+ hours to use some $20 cheaper FPGA card
[21:00:24] <CaptHindsight> so i guess their time is work 2 cents per hour (US)
[21:00:39] <Valen> I can see people wanting/using some kind of arm / serial usb thing they can build it themselves for a few $
[21:00:49] <Valen> but the base model mesa card is like $50 isnt it?
[21:01:49] <Valen> $90
[21:02:42] <rmu> if you want something cheap you can port something like this https://github.com to a €15 nucleo board
[21:03:06] <rmu> and plug it into a raspberry pi
[21:03:24] <rmu> takes about a weekend
[21:03:33] <Valen> machinekit is some variant of lcnc isnt it?
[21:03:46] <CaptHindsight> yeah fork
[21:04:09] <CaptHindsight> BBB turd board
[21:04:28] <CaptHindsight> turd i meant TI
[21:05:22] <CaptHindsight> the part people tend to leave out: no GUI
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[21:10:16] <flyback> yeah rpi would be fine also
[21:10:22] <flyback> in fact the pi0's would be perfect
[21:10:44] <flyback> you can run linuxcnc on both, just config the rpi one to be stripped and very timing critical
[21:10:52] <flyback> and one big linux cnc to drive them all
[21:12:07] <rmu> you need some external hardware to generate the pulses for steppers. timing on the pi is not accurate and not stable enough
[21:13:00] <rmu> (the GPU can and does change clocks at will without the CPU noticing)
[21:13:48] <CaptHindsight> and it's Broadcomm
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[21:16:12] <rmu> broadcom = unfriendly company. no real docs. available docs are inaccurate and incomplete. parts of the pi design just suck and did need 3 iterations to work better than "somewhat".
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[22:09:37] <flyback> broadcom > imagination technologies
[22:09:46] <flyback> they were so nda even m$ stopped working with them
[22:10:07] <flyback> they will be extinct soon enough
[22:10:11] <flyback> they already sold off mips
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[23:00:35] <SpeedEvil> rmu: Parts of the Pi design needed 3 design iterations when the chief of the pi foundation was _SENIOR ASIC DESIGN MANAGMENT AT BROADCOM_
[23:01:56] <SpeedEvil> And simple basic, basic issues like not bringing out the second USB port on the B, even as a header, meaning everything has to share bandwidth with the NIC through a USB hub. (till recently at least)
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