#linuxcnc Logs

Apr 30 2019

#linuxcnc Calendar

01:33 AM Deejay: moin
03:08 AM Loetmichel: *MUHAHA* coworker1 just repaired the VFD for the mill spindle... Coworker2 starts to mill something... $me: hmm, thats sounds strange. Walking into the workshop, stopping the spindle, looking... "COWORKER1! PLEASE SWAP 2 PHASES ON THE VFD!!!!!111"" :-)
03:21 AM The_Ball: or change configuration parameter #123 ;)
03:21 AM Loetmichel: The_Ball: swapping the spindle phases was easioer
03:22 AM Loetmichel: considering the setup: http://www.cyrom.org/palbum/main.php?g2_itemId=17171&g2_imageViewsIndex=1
03:22 AM Loetmichel: than searching for the VFD manual ;)
03:24 AM Loetmichel: and yes: the VFD NOW has filter flmat inside of the vent holes to prevent another "aluminium swarf accident
03:24 AM Loetmichel: -fl
03:25 AM Loetmichel: (it died because coworker2 used the air fun to clear swarf while milling aluminium and managed to blow the warf into the VFD
03:32 AM pink_vampire: where can i find the default colors for axis?
03:34 AM Loetmichel: The_Ball: seen the picture?
03:35 AM Loetmichel: that was the carnage btw: http://www.cyrom.org/palbum/main.php?g2_itemId=17292&g2_imageViewsIndex=1
03:35 AM The_Ball: Loetmichel, lol!
03:36 AM Loetmichel: it lived 6 years that way... until coworker2 used the air gun
03:36 AM Loetmichel: monkey see monkey do
03:36 AM Loetmichel: he has seen ME use the air gun, just didnt register that i used it from the OTHER side ;)
04:59 AM pink_vampire: funny, my vintage laptop make it to the front page of imgur
05:00 AM SpeedEvil: Your specific laptop/
05:00 AM pink_vampire: https://imgur.com/gallery/b2MthsV
05:01 AM XXCoder: nice lol
05:02 AM SpeedEvil: http://www.computinghistory.org.uk/userdata/images/large/12/78/product-111278.jpg - a model of my first laptop
05:03 AM pink_vampire: I have close to 900 images in imgur and this is the first time I got to the home page
05:03 AM Tom_L: morning
05:03 AM SpeedEvil: :)
05:03 AM pink_vampire: SpeedEvil: nice!
05:12 AM pink_vampire: 7800 views O_o wow this is crazy
05:13 AM SpeedEvil: https://i.imgur.com/N8v21ht.png This is my best post. I am not proud.
05:13 AM SpeedEvil: 7511
05:32 AM jthornton: morning
05:32 AM XXCoder: morning
06:09 AM jthornton: looks like it didn't rain last night, maybe get the middle raised bed planter done
10:39 AM Wolfmetalfab is now known as Wolf__
01:16 PM Joe_Hildreth: ls /boot
01:17 PM Joe_Hildreth: oops, sorry folks
01:20 PM Joe_Hildreth: Yesterday, I compiled a kernel with preempt-rt patch and then compiled LCNC. Today, I compiled a newer kernel. Do I need to recompile LCNC?
01:25 PM -!- #linuxcnc mode set to +v by ChanServ
01:30 PM mozmck: Joe_Hildreth: no, the uspace version of linuxcnc does not make kernel modules like the rtai version does.
01:30 PM mozmck: The rtai version makes all the realtime components a kernel modules and they are tied to the kernel version pretty tightly I believe.
01:33 PM Joe_Hildreth: Thank you mozmck. I am still playing in a VM, but the only issue I seem to be having is shutting down the machine. Hangs on the shutdown graphic (Lubuntu 18.04). Otherwise all seems good.
01:34 PM Joe_Hildreth: So are the rip-environment just preempt-rt systems or any that would be compiled including rtai?
01:39 PM JT-Shop: RIP simply means Run In Place, you can configure it how you like
01:40 PM JT-Shop: but you have to have the correct kernel to run RTAI or Rt Preempt
01:42 PM Joe_Hildreth: Thanks John. I am still trying to wrap my head around it all. When I cloned LCNC, I ended up compiling v2.8. How do I get the 2.7 stable branch?
01:42 PM skunkworks: Rt_preempt isn't as critical... If you have any rt_prememt kernel installed - linuxcnc will probably compile against it. (or even the installed will figure it out) Rtai is a bit more tricky..
01:42 PM Joe_Hildreth: Sorry for the newbie questions.
01:42 PM skunkworks: in your checkout - git branch 2.7
01:42 PM skunkworks: wait 0 I think
01:42 PM skunkworks: no git checkout 2.7
01:43 PM Joe_Hildreth: Thank you skunkworks.
01:44 PM Joe_Hildreth: When looking at the RTAI patches, it looks like it is only available for certain kernel versions. Can you use the newest, or are there issues compiling RTAI? As a newbie, should I stay away from it?
01:45 PM mozmck: You can compile linuxcnc for uspace without a realtime kernel at all and run it, but you'll have very poor latency unless you run it under a preempt-rt kernel! I've done that plenty. The same binaries will run fine under a preempt-rt kernel
01:45 PM mozmck: yes, stay away from it :-D
01:45 PM skunkworks: I agree
01:45 PM skunkworks: andy on here is trying to get a newer rtai livecd working but hasn't had much luck yet
01:46 PM mozmck: The newer versions of RTAI have been problematic - as in no-one has gotten one to work well for a while.
01:46 PM Joe_Hildreth: Thanks for the warning mozmck and skunkworks. I will stay away!
01:47 PM Joe_Hildreth: So, it sounds like a catch 22 for hobbyists running machines driven with PP. As I understand the preempt-rt install does not do well for PP driven machines.
01:47 PM skunkworks: aproaching rtai
01:47 PM skunkworks: on decent hardware - (hardware that plays well with rt_preemt) you can get pretty decent performace
01:47 PM skunkworks: aproaching rtai
01:48 PM skunkworks: it really depends on the computer
01:48 PM skunkworks: http://www.electronicsam.com/images/KandT/testing/8300/Screenshot_2019-04-26_17-53-42.png
01:49 PM Joe_Hildreth: OK. I am currently working on an addendum to the Parallel port video I done. I would like to do a tutorial on compiling a preempt-rt kernel and compiling LCNC to add to the playlist.
01:50 PM Joe_Hildreth: NICE, that is with preempt-rt kernel?
01:50 PM Joe_Hildreth: skunkworks ^^
01:51 PM skunkworks: Joe_Hildreth: yes
01:51 PM Joe_Hildreth: I have enough to progress forward, but will probably be back with more newbie questions. :-) Thank so much for the help!
01:53 PM skunkworks: rt_preempt usually works good for external interface cards... But is hit or miss for software stepping
02:00 PM JT-Shop: skunkworks: would rt preempt be fast enough for average stepper machines?
02:02 PM skunkworks: Some computers - yes - I was running 33khz step freq on the above computer
02:03 PM skunkworks: (equates to 200ipm with the given hardware)
02:04 PM JT-Shop: thanks
02:04 PM * JT-Shop tries to figure out what 33khz means in steps per minute...
02:05 PM JT-Shop: does double step work on rt preempt?
02:29 PM skunkworks: JT-Shop: yes - that was done with doublestep/freq whatever it is called
02:29 PM skunkworks: so - around 10000 steps per inch..
02:31 PM skunkworks: 33khz/10000steps/inch = 3.33 in/sec = 200ipm
02:32 PM jthornton: thanks, I can never grasp khz it's like centigrade
03:06 PM _abc_: Hi. Reading the article, I though, hey, this is a cnc job for sure. Anyone here into machining stone with the cnc? https://www.dailymail.co.uk/tvshowbiz/article-6973477/Kim-Kardashians-basin-bathroom-sink-cost-32k-experts-weigh-60m-LA-mansion.html
03:17 PM Deejay: gn8
03:27 PM _abc_: So? No-one buffing stones with a knee mill and a nice large "ball" with abrasive poweder and a little shower?
03:32 PM Rab: _abc_, my homeboy was going to try drilling glass on my CNC with diamond tooling, but got distracted...that's as close as I've gotten.
03:32 PM Rab: But what you describe sounds more appropriate for finishing than for rough profiling.
03:32 PM cradek: I've cut a lot of glass with cnc. it's easy, just use diamond tooling and do it underwater
03:33 PM Rab: cradek, yeah, we were gonna clamp the work in a little tray.
03:33 PM cradek: my friend kim taught me her discovery that water flows downhill, and knowing that, it was easy
03:34 PM cradek: (that house looks like a dystopian hospital)
03:34 PM Rab: He got a cylindrical tool, something like this. Seemed reasonable: https://www.walmart.com/ip/16mm-Diamond-Cutting-Rim-Glass-Hole-Saw-Drilling-Tool/869979927
03:35 PM _abc_: Rab: yes the sink definitely was done using polishing/finishing if you ask me. leather "fist" in cuck and wet abrasive paste
03:35 PM _abc_: Rab: those are for ceramic and glass yes but the finish obtained is not going to win any awards
03:36 PM Rab: _abc_, I would be most concerned about chipping on exit.
03:36 PM _abc_: Oh it does not by the time it gets out the hole is quite wide
03:36 PM _abc_: Also all Z movement on that thing will be slow, and while in rotation
03:37 PM Rab: _abc_, the article commentary acts like the sink is inexplicably flat, but I can see a dished profile in the pics.
03:38 PM _abc_: Sure never mind the article, it's the dm
03:39 PM Rab: Aside, that sink seems horrid. I wonder how many times Kanye sloshed water down his trousers before refusing to use it again.
03:42 PM Rab: Interesting twist on a vacuum table, the entire machine holds itself down: https://www.youtube.com/watch?v=QrygY_0iLMM
03:53 PM _abc_: Rab: yes, interesting. Also shows how tough that stone cutting is.
04:02 PM Wolf__: Nice, I’m not the only idiot that made a cnc machine to move on to the work piece lol
04:07 PM _abc_: There's that handheld toy where the router is the human holding it and the litte screen tells him how to move?
04:08 PM Wolf__: I made a cnc plasma little bigger then that cnc stone cutter
04:09 PM _abc_: Wolf__: hobby or professional?
04:09 PM Wolf__: both lol
04:09 PM _abc_: Of course, but which one more than the other? :)
04:09 PM Wolf__: mostly for shop use so kinda pro
04:11 PM _abc_: Ok, I'll go and sleep a bit now.
04:11 PM _abc_: Thanks, cu
05:18 PM SpeedEvil is now known as Guest45791
05:48 PM Tom_L: evening
05:53 PM Tom_L: jthornton, we got the rain today
05:53 PM Tom_L: came in with a boom around 3am
10:03 PM norias: hot dawg
10:03 PM norias: my little welding machine is a good time
10:04 PM _unreal_: ?
10:05 PM norias: I bought a little dc inverter stick welding machine
10:05 PM norias: it was on sale for $80
10:06 PM norias: runs on a 20A 120V circuit
10:06 PM norias: i was just welding exhaust components with it
10:06 PM norias: that thing is pretty handy
10:06 PM norias: only weighs 9 lbs
11:08 PM ziper: _unreal_, hey
11:20 PM _unreal_: um hi