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- How to handle servo drives with built-in PID ?
How to handle servo drives with built-in PID ?
04 Feb 2014 22:32 - 04 Feb 2014 22:34 #43543
by westveld
How to handle servo drives with built-in PID ? was created by westveld
First off - these Mesa card and PnCConf are brilliant!
When we have drives with their own PID settings, do we want to disable the PID in LinuxCNC?
Or disable the PID on the drives? Something else?
I'm testing with one axis. I have a Mesa 5i25 / 7i77 combo.
The machine uses old Osai A/B OSS-200 Digital brushless servo drives.
We can configure/monitor them with a serial connection.
The C axis that I'm starting with shows:
Thanks!
Matt Westveld
When we have drives with their own PID settings, do we want to disable the PID in LinuxCNC?
Or disable the PID on the drives? Something else?
I'm testing with one axis. I have a Mesa 5i25 / 7i77 combo.
The machine uses old Osai A/B OSS-200 Digital brushless servo drives.
We can configure/monitor them with a serial connection.
The C axis that I'm starting with shows:
Scale 299.9 RPM/V P GAIN 90
Offset 0.0000 V I GAIN 33
Peak I 15.9 AMP D GAIN 0
Overspeed 3495 RPM Mode(1): Velocity
Filter BW OFF Hz Monitor-ABS I
Thanks!
Matt Westveld
Last edit: 04 Feb 2014 22:34 by westveld.
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04 Feb 2014 22:47 #43544
by PCW
Replied by PCW on topic How to handle servo drives with built-in PID ?
For velocity mode drives (and you have that drive set in velocity mode),
Part of the PID loop is run in the drive and part in Linuxcnc
The driver runs the velocity PI loop and Linuxcnc runs a position
loop with mainly P and FF1
Part of the PID loop is run in the drive and part in Linuxcnc
The driver runs the velocity PI loop and Linuxcnc runs a position
loop with mainly P and FF1
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04 Feb 2014 22:52 #43545
by westveld
Replied by westveld on topic How to handle servo drives with built-in PID ?
Ah, that makes sense, thanks!
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