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Home Forum Configuring LinuxCNC PnCConf Wizard Mesa 5i20 - 7i37TA - 7i48

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TOPIC: Mesa 5i20 - 7i37TA - 7i48

Re:Mesa 5i20 - 7i37TA - 7i48 18 Apr 2012 10:56 #19356

I think I'm making progress. Long story short the P term was too low at 1.



I was probing like this. -.8V was after a few turns of the handwheel, maybe .8" of axis displacement.

I've increased P to 20 and now if I turn the hand wheel I get some resistance. The farther I turn it the more resistance I get. I got the REF voltage up to 6V. Is there a limit to how high P should go? Is there another way to scale the REF output?

EDIT: I originally mistakenly type DIR instead of REF, I'm editing it for future readers
Last Edit: 18 Apr 2012 11:38 by Will Gilmore.
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Re:Mesa 5i20 - 7i37TA - 7i48 18 Apr 2012 11:33 #19357

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by DIR I assum you mean analog output?
If these drives are running in velocity mode,
.8V should be hard to resist (thats 8% of full scal velocity)
normally for velocity mode drives you adjust P upwards
until the drive becomes unstable and back off some (then adjust FF1)
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Re:Mesa 5i20 - 7i37TA - 7i48 18 Apr 2012 12:40 #19359

Sorry I intended to write REF, not DIR (I've editted it above)

The drives are running in torque (current) mode.
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