Pin with currently used motion command

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RKtech
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26 Nov 2020 12:27 #190329 by RKtech

Pin with currently used motion command was created by RKtech

Hi, I'm working on a laser engraving setup, where I use M64/M65 to power the laser on and of and M68 to set the power for the requested feed rate of the Gx move command. With the pin 'motion.current-vel' and 'motion.requested−vel' I calculate the reduction of the laser power while the laser is accelerating or decelerating, so the laser "strength" is constant over way.
Now I have modified the CAM part of HeeksCAD/HeeksCNC so when there is a switch from (for example) G0 to G1 the M64 (laser on) Command is added and when there is a switch to G0 a M65 (laser off) is added.
This is currentl working as expected, but I like to simplify it a bit (because I didn't like to make changes in the CAM code of an dedicated program if there is no need)

And here is my Question: Is there a pin in linuxCNC where I can get the information if the move is a rapid move or not? so I can put the logic to swich the laser on and off into the linuxCNC part?

Thanks for any ideas.
Rainer

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Aciera
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26 Nov 2020 13:02 - 26 Nov 2020 13:03 #190333 by Aciera

Replied by Aciera on topic Pin with currently used motion command

Maybe this is useful?

motion.motion−type OUT S32

These values are from src/emc/nml_intf/motion_types.h

0: Idle (no motion)

1: Traverse

2: Linear feed

3: Arc feed

4: Tool change

5: Probing

6: Rotary axis indexing

linuxcnc.org/docs/html/man/man9/motion.9.html

Last edit: 26 Nov 2020 13:03 by Aciera.

The following user(s) said Thank You: tommylight, RKtech

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RKtech
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26 Nov 2020 19:30 #190355 by RKtech

Replied by RKtech on topic Pin with currently used motion command

Thank you for your hint, this was exactly what I was looking for (I have several times read this man page but I always over read this motion-type).

With type 2 and 3 I got what I need, and with this HAL config

setp wcomp.0.min    1.9
setp wcomp.0.max    3.1
net machine-motion-type-s32    motion.motion-type  =>  conv-s32-float.0.in
net machine-motion-type-float  conv-s32-float.0.out => wcomp.0.in
net laser-active-motion     <= wcomp.0.out

I have TRUE/FALSE in the "laser-active-motion" signal and that's what I need. THX

The following user(s) said Thank You: tommylight, Aciera

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tommylight
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26 Nov 2020 19:45 #190360 by tommylight

Replied by tommylight on topic Pin with currently used motion command

Well that was quick !

Nicely done.

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Aciera
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26 Nov 2020 19:48 #190361 by Aciera

Replied by Aciera on topic Pin with currently used motion command

Thanks for sharing that.

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