#linuxcnc Logs

Apr 15 2020

#linuxcnc Calendar

02:40 AM Deejay: moin
03:47 AM miss0r: Doing some nasty turning at the moment. 230mm diameter https://imgur.com/a/ZOaDXn0
03:47 AM XXCoder: big
03:48 AM miss0r: tje outside jaws only clears the highest point of the ways by 4mm
03:48 AM miss0r: Biggest I can fit
03:49 AM XXCoder: whats ou making
03:49 AM miss0r: I've decided to wait until this corona stuff is over to purchase a new lathe. So I decided to make an adaptor plate for a pretty big 3-jaw I have laying around that is almost new compared to the small one I usualy run
03:50 AM miss0r: I don't want it on there because it is bigger. I want it on there so i can center stuff up within reason in the 3-jaw
03:51 AM miss0r: Now this little piggie has to go to the market. See you in a bit
03:51 AM XXCoder: later
03:59 AM Loetmichel: on that account: anyone know a source for a high quality 3jaw that fits an emco3? (M14 reverse thread IIRC)
03:59 AM Loetmichel: coworker just bought a used one that came without a chuck
04:00 AM XXCoder: yeah
04:00 AM Loetmichel: ah, and cheap prefered, of course ;)
04:00 AM XXCoder: another lathe. make one ;)
04:00 AM Loetmichel: i have no means for hardening atm
04:00 AM XXCoder: drat. i did see video about computer controlled hardening box. cool!
04:01 AM Loetmichel: and i doubt my CNC mills are up to snuff regarding milling tool steel in the first place
04:01 AM XXCoder: it can soften, harden to any degree, or specify your own recipe.
04:01 AM Loetmichel: made a few soft alu "claws" for my small C0 lathe tough, that worked surprisingly well
04:01 AM XXCoder: probably not, tool steel is tough ad
04:01 AM XXCoder: af&
04:02 AM Loetmichel: what are those called?
04:02 AM XXCoder: we use alum jaws for some jobs yeah (lathe)
04:02 AM Loetmichel: jaws?
04:02 AM XXCoder: (dunno if jaws is right word too lol) not lathe guy
04:04 AM XXCoder: alum jaws (here we go again) have few points thats nice. some jobs require very precise positioning, as well as just use dummy rod in middle and use special program to mill jaws itself. smaller rod than last time, and evenually scrap jaws but you will never have center and size issues
04:05 AM XXCoder: very rare though most of em they just setup stuff find coord etc
04:26 AM pink_vampire: XXCoder: it is very common to use soft jaws on a lathe,you can machine them and they grip better in some cases
04:38 AM XXCoder: yep
04:59 AM jthornton: morning
04:59 AM jthornton: 36°F so far
05:00 AM XXCoder: didnt bother to use coat today
05:00 AM XXCoder: doubt I will till sat, that is, if i go anywhere besides work
05:02 AM pink_vampire: 8.29° N here
05:04 AM pink_vampire: 112.41°De
05:14 AM renesis: .wz
05:14 AM renesis: oh this is not where i thought this is
05:21 AM pink_vampire: ?
05:32 AM pink_vampire: renesis: ?
06:20 AM miss0r: damn this steel.. It has some serious hard spots in it
06:21 AM jthornton: I have a chunk of steel like that, I try and avoid using it
06:23 AM miss0r: The main issue here is that I ordered cast iron, and ended up with steel
06:24 AM miss0r: and steel with hard spots at that
06:24 AM jthornton: I should put it in the McCoys pile
06:24 AM miss0r: you'll need to elaborate on the McCoys part
06:24 AM jthornton: local scrap yard
06:25 AM miss0r: makes sense. I was hoping for some sort of pun to be honnest
06:25 AM jthornton: too early in the morning to be clever
06:27 AM miss0r: hehe not for me
06:27 AM miss0r: Its not even morning anymore.
06:27 AM miss0r: :D
06:28 AM miss0r: I think I got rid of the last hardspot... 4 inserts were claimed
06:28 AM miss0r: It will be interresting making a 50mm G5 fit in this bore...
06:31 AM jthornton: hmm we didn't make it to 0°C it's 2°C at sunrise
06:32 AM miss0r: That is pretty nice. 'round here its starting to get all hot and sunny.. bah
06:36 AM miss0r: it almost feels like continues cast steel this
06:36 AM miss0r: Would explain the hard spots located in and around the center too
06:36 AM miss0r: I could've been done by now, had I gotten the iron.
06:36 AM miss0r: But I would still be cleaning though :D
06:36 AM jthornton: what are you making?
06:37 AM miss0r: https://imgur.com/a/ZOaDXn0
06:37 AM miss0r: An adaotor plate for my "new" 3-jaw
06:38 AM miss0r: 230mm OD
06:38 AM miss0r: (the workpiece that is)
06:38 AM miss0r: the new 3-jaw is a 250mm one
06:38 AM jthornton: nice big chunk o steel
06:40 AM miss0r: yeah. I was at a place yesterday to fix a hydraulic problem on a big bandsaw, and I asked for a piece of cast iron of that dimension. apparently the guy there took the wrong stock..
06:41 AM miss0r: American owned company actualy.. All their strict funny rules ect...
06:47 AM p0g0: jthornton, 26f here, likely closer to 31 in the sheltered forest.
07:05 AM jthornton: looks like we have a few more cold nights left
07:06 AM jthornton: https://gnipsel.com/images/garden/raised-beds/raised-bed-2020-4-14-01.jpg
07:28 AM Tom_L: 28°F
07:28 AM methods_: https://bikerglen.com/blog/p1am-100-isolated-rs-485-shield/
07:32 AM unterhaus: I used to work in an office above a machine shop where they make big things on lathes. They had to load the lathes with forklifts
07:33 AM unterhaus: every once in a while they would drop something and scare the crap out of me
07:33 AM unterhaus: pretty sure one of the lathes was under my desk
07:33 AM Tom_L: good your office wasn't _below_ it
07:36 AM unterhaus: there is a basement, I'm pretty sure.
07:48 AM Loetmichel: unterhaus: a friend of mine worked at a big forge as a forklift driver... the street in front of the company is going down a hill and ending in a dead eand with parking lot... he had a 25 ton roughly forged crankshaft on the forks. and hit the brakes a bit to hard... rest i leave to your imagination
07:48 AM Loetmichel: lets just say it was LOUD and EXPENSIVE
07:49 AM Loetmichel: (re-> dropping things)
07:53 AM unterhaus: I take it the company had to buy some new Mercedes
07:56 AM Loetmichel: about a dozen cars of all makes, yes
07:57 AM Loetmichel: he had "secured" it... with a 2 ton ratchet strap... and that thing was still hot from forging ;)
07:57 AM Loetmichel: not his brightest hour ;)
08:29 AM JavaBean|new: Loetmichel: is that what got him fired/caused him to leave that job?
08:34 AM Loetmichel: nope, JavaBean|new
08:35 AM Loetmichel: he still worked there last time i saw him
08:35 AM Loetmichel: its not that easy to fire a german worker
08:41 AM JavaBean|new: lol
08:41 AM JavaBean|new is now known as JavaBean
08:42 AM MacGalempsy: good morning
08:50 AM jymmmm: good morning
08:55 AM rmu|w: grrr.... replaced parallel-port 7i90 with ethernet 7i93 and NOTHING seemed to work. strange voltages all over the place. seems the only connection between mesa field voltage GND and maschine control voltage GND was via parallel port and earth pin of computer
08:56 AM rmu|w: whereas ethernet is isolated -> no GND -> no work
10:54 AM Tom_L: rmu|w, 7I90 -> 7I80
10:54 AM Tom_L: direct dropin practically
10:55 AM Tom_L: fwiw
11:06 AM Tom_L: of course that still wouldn't fix your GND issue
12:34 PM Deejay: re
12:34 PM fenugrec: hi, I have a machine running linuxcnc on Lucid which is now super old, and I need to update some packages. The system update manager fails because the Lucid packages are no longer on archive.ubuntu.com. Any suggestions ?
12:35 PM andypugh: Can the machine run a newer linux?
12:35 PM andypugh: Are you using the parallel port or something more advanced?
12:35 PM fenugrec: I haven't tried redirecting the apt/sources.conf entries to ' old-releases.ubuntu.com' but it's probably just delaying the inevitable. andypugh : yes I don't expect any difficulties
12:35 PM fenugrec: parallel port unfortunately
12:42 PM andypugh: You should be able to boot from the Stretch LiveCD and test the latency of the machine that way.
12:42 PM fenugrec: yep, can do that. Then just basically re-install from scratch and copy my machine config ?
12:42 PM fenugrec: (assuming latency is satisfactory)
12:42 PM andypugh: http://www.linuxcnc.org/downloads/
12:42 PM Tom_L: that old a config might need some slight changes possibly
12:42 PM andypugh: Yes. As long as you save the linuxcnc folder you should be OK.
12:42 PM Tom_L: i'd make a backup of them just in case
12:42 PM fenugrec: Tom_L, indeed, I've been having some issues with joint following errors recently, I need to revisit the config anyway
12:42 PM andypugh: The question is whether that machine + preempt-rt has low enough latency for software stepping.
12:42 PM fenugrec: is it a different kernel than what the Lucid implementation used ?
12:42 PM Tom_L: if stretch doesn't work out, wheezy would be a bit newer
12:42 PM fenugrec: RTAI if memory serves
12:42 PM andypugh: It will be on Lucid.
12:42 PM Tom_L: was lucid ubuntu?
12:42 PM andypugh: Yes
12:42 PM Tom_L: anything newer will likely be debian right?
12:42 PM fenugrec: Ok. So preferably Strecth for the long term, and wheezy if not because it has possibly better RT performance
12:42 PM andypugh: Yes
12:43 PM Tom_L: stretch by default runs preempt-rt if i'm not mistaken
12:43 PM Tom_L: which may require newer hardware to get decent latency
12:43 PM andypugh: I don’t think we have an RTAI kernel for Stretch
12:43 PM Tom_L: they've been working on a RTAI for it
12:43 PM Tom_L: i dunno if it works yet
12:44 PM Tom_L: or was that for buster?
12:44 PM andypugh: Actually, that’s not true. I have tested the 4.14.174 RTAI kernel with Stretch.
12:45 PM Tom_L: i probably wouldn't get very far on an old D525 board with it would i?
12:46 PM andypugh: But we don’t have any LinuxCNC packages for that combo.
12:46 PM Tom_L: mmm
12:46 PM Tom_L: you have to build both or just the kernel?
12:47 PM andypugh: D525 is 64 bit, should be OK
12:47 PM Tom_L: i'm running wheezy 32bit iirc right now
12:47 PM Tom_L: i could toss a spare ssd in it and give it a whirl but i'd need some coaching...
12:47 PM andypugh: Tom_L: If you want to experiment, and the PC isn’t critical to makingparts, the packages in www.linuxcnc.org/temp should work with Stretch or Buster.
12:49 PM Tom_L: well, i'd keep the original ssd separate...
12:51 PM Tom_L: i've got a stretch ssd in another pc i could stuff in it and try the RTAI to see
12:53 PM Tom_L: andypugh, do i need the linux-image 4.14.174? or all of it?
12:53 PM andypugh: All of it. Install linux-image then linux-headers, reboot, install the rest
12:57 PM rmu|w: Tom_L: regarding the ground issue, after i found out what was (not) goind on, fixing it was trivial.
01:02 PM Tom_L: andypugh, should i start with a fresh stretch iso or the linuxcnc-stretch preempt-rt one?
01:03 PM Tom_L: which i lost the link to...
01:04 PM andypugh: Tom_L: Either should work. The LinuxCNC one is on the Downloads page at www.linuxcnc.org
01:04 PM Tom_L: oh did stretch get moved to the dl page?
01:05 PM Rab: Tom_L, I had to upgrade from Stretch to Buster to use the linuxcnc_2.8.0~pre package.
01:05 PM Tom_L: oh?
01:06 PM Tom_L: there's an issue with missing packages on buster for gmoccapy and gscreen
01:06 PM Tom_L: but i'm not using them anyway..
01:07 PM skunkworks: I should try the rtai on the emco lathe.
01:09 PM Tom_L: has the stretch iso changed any since it was posted as experimental?
01:09 PM Tom_L: i've got an old copy of it...
01:09 PM skunkworks: I should also upgrade the laptop to buster... but it has been running so well
01:09 PM Tom_L: i don't plan to overwrite anything
01:10 PM skunkworks: Tom_L: I don't really think so.. Plus apt-get update/upgrade should bring it up to date
01:10 PM Tom_L: true
01:10 PM Tom_L: guess i'll grab the box and bring it in here to mess with
01:24 PM * Tom_L grabs the buster dvd
01:27 PM Tom_L: this could take a while on that old board
02:15 PM Tom_L: ok rebooting..
02:19 PM Tom_L: andypugh, do i need linuxcnc_2.8.0~pre_amd64.deb or linuxcnc-dev_2.8.0~pre_amd64.deb?
02:21 PM andypugh: Both
02:21 PM Tom_L: ok
02:24 PM Tom_L: should uname -a show RTAI?
02:24 PM andypugh: Yes.
02:25 PM andypugh: You will probably need to choose the new kernel from “advanced options” in the grub menu
02:25 PM Tom_L: i must be missing a step
02:25 PM Tom_L: ok
02:25 PM Tom_L: that shows up on boot?
02:26 PM andypugh: yes,
02:26 PM Tom_L: got it..
02:26 PM Tom_L: do i need to install lcnc from the package manager also? it's not showing up on the menu
02:28 PM Tom_L: mmm the res shows up in 640 x 480 :(
02:33 PM unterhaus: I had that problem with the resolution. I guess I have to come up with a xorg.conf file or something
02:33 PM unterhaus: pain in the but
02:33 PM unterhaus: t
02:35 PM Tom_L: how did you get past it?
02:36 PM Tom_L: hard to do much with half the screen :)
02:36 PM rmu|w: Tom_L: does the proper resolution show up in the output of xrandr?
02:39 PM Tom_L: failed to get size of gama for output default screen 0:.........
02:47 PM JT-Shop: Tom_L, what are you doing?
02:48 PM Tom_L: test buster with andy's RTAI on an old D525 board
02:49 PM Tom_L: so far it's stuck in 640 x 480 and linuxcnc is missing something but i can't see what. it's off the screen
02:51 PM Tom_L: but rtai did load
02:51 PM Tom_L: that's when the problems started. prior, the screen res was ok
02:56 PM fenugrec: there's no torrents for the downloads like some distros do, right ?
02:57 PM Tom_L: not that i'm aware of
02:57 PM Tom_L: this is an experimental kernel
03:07 PM Tom_L: booting the default kernel is 1920x1080 res
03:16 PM Rab: Tom_L, for whatever reason, my system only supports VESA modes with the RTAI test kernel. My display came up at 1600x1200 (1920x1200 monitor).\
03:19 PM Rab: I haven't played around with grub options at all. I do see that my Intel graphics and monitor are correctly identified in Xorg.0.log, with an available 1920x1200 mode, so no idea why X isn't using it.
03:20 PM Rab: Can't be too hard to figure out. I was so pleased to be up and running that I immediately turned my attention elsewhere. ;)
03:21 PM Rab: Tom_L, tried looking in display settings to see if any higher res is available?
03:21 PM Tom_L: doesn't show anything else
03:25 PM Rab: Does xrandr show any other modes, if you run it in a terminal?
03:25 PM rue_mohr: there was another one for going thru video modes... and old one...
03:33 PM Rab: Hmm, trying to wire up these IKO linear stages. They have prox sensors with N.C. NPN output (pull-down when active), and I'm short on I/O...not sure how to get them to share an input without an external OR gate or something.
03:41 PM Tom_L: gtg, will fiddle with this later
03:43 PM Tom_L: https://www.calculated.com/mobile/prd377/Machinist-Calc-Pro-2-4088-Machining-Calculator-with-Materials.html
03:43 PM Tom_L: anyone ever use one of those?
03:44 PM Tom_L: just got one free...
03:47 PM JT-Shop: never seen one before, what does it do?
03:56 PM Deejay: gn8
04:04 PM Tom_L: JT-Shop, i'm not sure yet. my kid won it at that skills competetion last year
04:05 PM Tom_L: looks like all sorts of feed calcs, bolt patterns and who knows what else
04:05 PM Tom_L: all sorts of milling ops
04:06 PM Tom_L: thread classes
04:07 PM Tom_L: materials
04:08 PM Tom_L: https://www.youtube.com/watch?v=MZX8J_al2J0&feature=youtu.be
04:10 PM Tom_L: https://www.youtube.com/watch?v=zPU09rOtTRk&feature=youtu.be
04:10 PM Tom_L: JT-Shop, ^^ if you got time to burn :)
04:12 PM _unreal_: just got home transfering my "$1200" into my stocks account right now :)
04:13 PM Tom_L: andypugh, stretch would likely have the same video res problem ehh?
04:16 PM Rab: Tom_L, sorry to keep jumping in, but video was fine for me with Stretch and Buster stock preempt-rt kernels.
04:17 PM Rab: Running Buster preempt-rt now with 1920x1200 video. I reboot into RTAI to run LinuxCNC.
04:26 PM Tom_L: yeah i got good res with the default kernel
05:03 PM andypugh: Tom_L: Yes, though it is better than it was, it was only doing 1024x768 max before we tweaked some settings.
05:03 PM Tom_L: i wonder if i should try stretch with it..
05:04 PM andypugh: Stretch is quite old too
05:04 PM Tom_L: i'm not sure what i'm doing to begin with but it doesn't see the graphic drivers aparently
05:04 PM Tom_L: the chip is an intel GMA3150
05:05 PM andypugh: I wish I was an expert on this stuff, I am not
05:06 PM Tom_L: you're far better off than i
05:06 PM andypugh: I wouldn’t bet on it. I might be 4 hours of google ahead of you.
05:06 PM Tom_L: it burps installing linuxcnc too but i can't see why since it's off the screen
05:07 PM andypugh: command line should give more clues.
05:08 PM andypugh: (and I would have to google for the shortcut, but you can drop out of the desktop to a terminal, then mess about with installing debs and editing Xorg.conf
05:11 PM Tom_L: linuxcnc is complaining about that gtksourceview2 package
05:11 PM Thorhian: You mean going to a TTY andypugh? Control + Alt + F*
05:11 PM Tom_L: not alot i can do about that one. i think last time i did this i got that from sid
05:12 PM andypugh: Tom_L: You _could_ get that from Sid, but I think it disappeared
05:12 PM Tom_L: oh
05:12 PM andypugh: (it’s something we will have to backport locally when we release, I think)
05:12 PM Tom_L: afraid so
05:13 PM andypugh: You should be able to set up to use the Stretch repo for long enough to get it?
05:13 PM Tom_L: probably
05:14 PM Tom_L: i need to get past the graphic issue before i can do much of anything
05:15 PM andypugh: Yes, sorry not to be able to help much there.
05:16 PM andypugh: Is it better with the default buster kernel?
05:16 PM Tom_L: i get full res with it
05:17 PM Tom_L: 1080
05:18 PM andypugh: Might be interesting to find out what driver that is using, and maybe look at the xranr modes there.
05:18 PM Tom_L: i don't know what i'm doing there
05:18 PM Tom_L: treading uncharted territory
05:18 PM andypugh: Nor I. But Google is helpful.
05:19 PM Tom_L: https://01.org/linuxgraphics/downloads/2018q1-intel-graphics-stack-recipe
05:19 PM Tom_L: was looking at that but i don't honestly think i need it
05:20 PM Thorhian: Gotta *love* old intel iGPUs.
05:20 PM Tom_L: i tried changing modes but it wouldn't let me
05:20 PM andypugh: No, I definitely want you to find a solution that doesn’t need drivers.
05:20 PM andypugh: (‘cos if you find it, I don’t have to)
05:20 PM Tom_L: haha
05:21 PM Thorhian: Wait, do you not have the intel drivers installed on there? Is that a bad thing for latency?
05:21 PM Tom_L: no intel drivers for this on linux that i know of
05:21 PM Tom_L: i tried the disk that came with it
05:22 PM Thorhian: Ah, so your intel gpu is too old for the open source intel gpu drivers?
05:23 PM andypugh: The RTAI kernel only includes some drivers
05:24 PM Thorhian: Hmmm. Is it possible to compile the kernal with the intel driver additions (if that GPU is supported)?
05:29 PM andypugh: https://imagebin.ca/v/5JFsCVqNIsrl
05:30 PM andypugh: C3xx is on
05:30 PM andypugh: But, also, so is DRM and that might be a way round this.
06:16 PM Tom_L: making my head hurt.
06:19 PM andypugh: You don’t want my head at the moment. It’s full of bafflement
06:20 PM andypugh: Did you know that the %p printf formatter _lies_ to you?
06:20 PM Thorhian: Oh?
06:20 PM andypugh: It’s documented and everyting.
06:20 PM andypugh: https://lwn.net/Articles/740249/
06:20 PM Thorhian: I'm guessing you are reading the man page ATM?
06:21 PM andypugh: I spent some of today wondering why the page-align macro wasn’t working
06:21 PM Thorhian: Page-align macro?
06:22 PM andypugh: adr = 00000000a6716a26 , ALIGN2PAGE(adr) = 00000000a6716a26
06:22 PM Thorhian: Oh I'm guessing you are refering to C macro?
06:28 PM _unreal_: bafflement eh eh eh eh
06:39 PM andypugh: I reckon that they should have alse done a rot13.
06:40 PM andypugh: Then it is very obviously not a real hex number.
07:06 PM fenugrec: argh. max jitter was 12.8us on the current setup (Lucid, RTAI ?); just tested latest Stretch and >40us jitter
07:16 PM andypugh: What is your BASE_PERIOD in the INI
07:20 PM andypugh: 40µs isn’t greatm but might be usable
07:21 PM andypugh: fenugrec: (makes a noise)
08:06 PM fenugrec: andypugh, was 25us
08:07 PM andypugh: OK, you can’t run that with 40µs latency
08:07 PM andypugh: What is your step rate at max velocity?
08:08 PM skunkworks: andypugh: is the cutter clamped to your table the one you want to bore some square holes in?
08:09 PM andypugh: Yes, I left it there for fun.
08:10 PM skunkworks: I accuratly bored the center of a timing pully tonight. (the existing hole was quite a ways off) I could not live without my probe.
08:11 PM fenugrec: andypugh, my bad, BASE_PERIOD was set to 33.3us on the old setup (sounds like 25us + max_jitter). haven't worked with setp rates in a while, hold on... MAX_LINEAR_VELOCITY = 35 on one axis
08:11 PM skunkworks: what is the input scale?
08:12 PM fenugrec: https://pastebin.com/yDvVgbR1
08:13 PM skunkworks: 30k steps per second..
08:13 PM fenugrec: scale = 1000. So... 30000 steps/s ? sounds awfully high
08:13 PM skunkworks: That is getting to be close to the limit that I have found for rt_preempt.
08:13 PM fenugrec: I had acceleration problems recently but IIRC top speed was scary fast
08:14 PM skunkworks: that was a quad core i5
08:14 PM fenugrec: heh, I'm a few generations behind - Athlon64 3500 something
08:17 PM skunkworks: if you could run a 60us thread - you could get around 20mm/s
08:18 PM skunkworks: if my math is working tonight
08:18 PM andypugh: Preempt-rt might not work for you.
08:19 PM andypugh: We don’t plan to drop RTAI, but at this moment there is no easy path to RTAI and anything newerr than the ancient and unsupported Wheezy
08:20 PM Tom_L: you can say that again :)
08:20 PM skunkworks: Tom_L: you tried?
08:20 PM Tom_L: hung up on video
08:21 PM Tom_L: but i was trying buster with RTAI
08:21 PM andypugh: (Tom_L went through the path live on camers tonight, with mixed results)
08:21 PM Tom_L: right now i'm giving stretch a go just to see
08:24 PM Tom_L: andypugh, were you going to try rebuilding the kernel with those changes just to see?
08:25 PM fenugrec: andypugh, thanks, that was my next question (RTAI on Stretch)
08:26 PM Tom_L: bulk of it is just about installed
08:26 PM andypugh: Tom_L: What changes?
08:27 PM Tom_L: DRM
08:27 PM Tom_L: i know nothing about it...
08:27 PM andypugh: That screen grab was the config of the kernel you are running
08:28 PM Tom_L: right
08:28 PM Tom_L: i figured it was
08:29 PM andypugh: So, I don’t know what I could do to help with your PC. I would like to, I have one in my milling machine…
08:33 PM Tom_L: after i test stretch i'll go back to it and see if i can dig a deeper hole
08:56 PM Tom_L: servo thread: 6997595
08:56 PM fenugrec: is there such a thing as a "baremetal" linuxCNC port ? possibly even something without the "linux" part, that runs on custom hardware
08:58 PM fenugrec: I guess that would be "GRBL" or similar projects
08:58 PM Tom_L: no comparison
08:59 PM andypugh: Equivalent in some ways
09:00 PM fenugrec: how so ? they're obviously way different in implementation, but functionally ?
09:00 PM andypugh: GRBL / Mach3 / LinuxCNC all work for all practical purposes.
09:00 PM Tom_L: bass thread: 13324609 servo thread: 12920366
09:00 PM Tom_L: running glxgears
09:01 PM Tom_L: video is ok on stretch
09:01 PM fenugrec: haha 13ms jitter ^ ? ouch
09:01 PM andypugh: Sounds like it might be running POSIX non-realtime
09:01 PM Tom_L: 4.14.174 rtai.....
09:02 PM Tom_L: hyperthreading off
09:02 PM andypugh: If you srart LinuxCNC from the command line, at some point it says what realtime it is running
09:10 PM Tom_dev: Linux stretch 4.14.174-rtai-amd64 #2 SMP PREEMPT Sun Mar 22 14:26:24 GMT 2020 x86_64 GNU/Linux
09:11 PM Tom_dev: the sim is using POSIX
09:13 PM Tom_dev: as is the latency test
09:13 PM Tom_dev: how do i change that?
09:14 PM Tom_L: this was from the stretch livecd install iso
09:14 PM andypugh: POSIX what?
09:14 PM Tom_dev: Note: Using POSIX non-realtime
09:15 PM andypugh: That’s not good
09:15 PM Tom_dev: i should uninstall that 2.7 copy and install from the linuxcnc/temp directory
09:26 PM skunkworks: Tom_dev: you didn't install linuxcnc - just used what was installed on the stretch iso?
09:26 PM Tom_dev: correct
09:27 PM skunkworks: I don't think that works. I don't think it can switch between rtai and rt_preempt
09:27 PM andypugh: Hmm. you need to install the rtai linuxcnc debs from the temp dir
09:27 PM Tom_dev: yeah i'm trying to. getting a bunch of dependency errors now
09:28 PM Tom_dev: i might go back to the debian stretch iso and start from there
09:29 PM andypugh: How are you insrtalling the debs?
09:30 PM Tom_L: dpkg -i /pathtodebs/xx.deb
09:31 PM andypugh: Try sudo apt-get install ./path-to-deb
09:31 PM andypugh: That tends to pull in the deps
09:31 PM Tom_L: oh
09:31 PM Tom_L: i might start again anyway, the gui is all messed up anyway
09:32 PM Tom_L: shouldn't take too long
09:32 PM andypugh: You need the ./ to make it look locally for the deb
09:32 PM Tom_L: alright
09:33 PM Tom_L: the video was better but the aspect was off
09:38 PM Tom_L: you can upgrade from stretch to buster right?
09:38 PM Tom_L: i wonder if that would leave those graphic packages needed
09:39 PM andypugh: Possibly
09:40 PM Tom_L: i'll give that a go after i test this out
09:40 PM Tom_L: https://www.calculated.com/mobile/prd377/Machinist-Calc-Pro-2-4088-Machining-Calculator-with-Materials.html
09:41 PM Tom_L: first glance i have little use for that
09:41 PM Tom_L: was given to me
10:19 PM Tom_dev: latency-test
10:20 PM Tom_dev: ./usr/bin/halrun: line 83: /etc/init.d/realtime: No such file or directory
10:21 PM Tom_dev: linuxcnc
10:21 PM Tom_dev: ./usr/bin/linuxcnc: line 273: /usr/bin/wish8.6: No such file or directory
10:23 PM Tom_dev: Linux stretch 4.14.174-rtai-amd64 #2 SMP PREEMPT Sun Mar 22 14:26:24 GMT 2020 x86_64 GNU/Linux