VMC related HAL questions.

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26 May 2015 08:14 #59054 by andypugh
Replied by andypugh on topic VMC related HAL questions.

Encoders go back to the MESA card. If I were using brushless motors then hall sensors would go to the amps only.


Ok, that sounds like a torque-mode system.

Rather than repeat stuff:
www.gnipsel.com/linuxcnc/tuning/torque.html

But let us know how that works for you, maybe your experience can expand that.

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01 Jun 2015 10:38 #59293 by sspeed33317
Been working a lot lately and l i finally made it over to the workshop, pulled the computer and all my MESA stuff to bring back home.
Reinstalled LinuxCNC with the latest updates. And now I may be moving workshops again... and then next Wednesday the 10th of June I am heading
over to your side of the pond Andy. Coming over for the 24 Hour LeMans..

I am hoping i can get to work on it when i get back but I may be putting all of my stuff in a storage unit for a little while until I can find
a smaller shop. the rent has been a killer and i was hoping to be able to get a garage built but the $$ has been slow coming.

I am going to set up the controls at home and then bring the whole thing to the machine when its ready.

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02 Jun 2015 08:40 - 02 Jun 2015 09:23 #59325 by sspeed33317
Having a slight problem.. getting an error when opening the VMC simulator.

I believe i followed your instructions to install the carousel comp.
But it doesn't look like it went to the correct directory


Was trying to attach the error file.. seems i got it to upload..



File Attachment:

File Name: errorfile.txt
File Size:63 KB
Attachments:
Last edit: 02 Jun 2015 09:23 by sspeed33317.

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02 Jun 2015 16:20 #59336 by andypugh
Replied by andypugh on topic VMC related HAL questions.

I believe i followed your instructions to install the carousel comp.
But it doesn't look like it went to the correct directory


No, it appears not "toolchange.hal:1: Can't find module 'carousel' in /usr/realtime-3.4-9-rtai-686-pae/modules/linuxcnc"

Can you paste the output of
sudo comp --install --install-doc carousel.comp
(Or sudo halcompile... if using a development LinuxCNC version)

If it doesn't end with a cp... command then something hasn't quite worked.

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02 Jun 2015 21:55 - 03 Jun 2015 09:04 #59346 by sspeed33317
I got it !!!...

i did a lot of searching ...

i finally found your post 58057
followed the way it was done there and it worked ....

I was way off on the procedure.
Last edit: 03 Jun 2015 09:04 by sspeed33317.

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05 Jun 2015 18:32 #59472 by thewho
Replied by thewho on topic VMC related HAL questions.
Well I finally had a go at the closed loop spindle control you helped me with.
I didn't really know what I was doing so I'll attach the files if you Andy or someone else have the time to take a look at them?
One thing, I have a +/-10V drive so there i no need for the fwd/rev outputs. I just commented those lines but I might have to edit something else to?
Attachments:

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05 Jun 2015 21:28 #59480 by andypugh
Replied by andypugh on topic VMC related HAL questions.
You have

loadrt orient
addf orient.0 servo-thread

#loadrt mux2 -- This has already been loaded in the sim_vmc.hal
addf mux2.0 servo-thread # chooses which pid output goes to the spindle speed control


You need to un-comment the loadrt mux2, as I don't think you have that loaded elsewhere.

#for a real spindle run by a VFD
loadrt abs
addf abs.0.servo-thread
net spindle-cmd 		mux2.0.out abs.0.in
net spindle-cmd-abs 	hm2_5i25.0.7i77.0.1.analogout5
#net spindle-fwd 		abs.0.is-positive parport.0.pin-NN-out
#net spindle-rev 		abs.0.is-negative parport.0.pin-NN-out


This needs to be
net spindle-cmd 		mux2.0.out  	hm2_5i25.0.7i77.0.1.analogout5
To send the bipolar speed command to the analogout.

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05 Jun 2015 22:14 #59485 by thewho
Replied by thewho on topic VMC related HAL questions.
Like this?
#for a real spindle run by a VFD
loadrt abs
addf abs.0.servo-thread
net spindle-cmd 		mux2.0.out hm2_5i25.0.7i77.0.1.analogout5
net spindle-cmd-abs 	hm2_5i25.0.7i77.0.1.analogout5

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05 Jun 2015 22:21 #59486 by andypugh
Replied by andypugh on topic VMC related HAL questions.

Like this?
#for a real spindle run by a VFD
loadrt abs
addf abs.0.servo-thread
net spindle-cmd 		mux2.0.out hm2_5i25.0.7i77.0.1.analogout5
net spindle-cmd-abs 	hm2_5i25.0.7i77.0.1.analogout5


No...

Replace the entire section I quoted with the single replacement line.

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05 Jun 2015 22:52 - 05 Jun 2015 23:29 #59488 by thewho
Replied by thewho on topic VMC related HAL questions.
Oh, when reading your message again it seems quite obvious :blush:

Tried it in the machine but I see no change in behavior. I did not get any errors at startup.
Tried a M3 S100 but It doesn't compensate at all? Am I missing something here?

M33.1 Does not do anything ether.

EDIT: Oh wait, I´m stupid.. Did get an error though

EDIT2:
Debug file information:
.
Error: could not insert module /usr/realtime-3.4-9-rtai-686-pae/modules/linuxcnc/pid.ko: File exists
spindle.hal:1: exit value: 1
spindle.hal:1: insmod failed, returned -1
See the output of 'dmesg' for more information.
4364
  PID TTY      STAT   TIME COMMAND
Stopping realtime threads
Unloading hal components
Last edit: 05 Jun 2015 23:29 by thewho.

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