7i77 > Huanyang GT series VFD issues
09 Jun 2018 21:23 #112087
by andypugh
That suggests that your velocity feedback is backwards.
Does the encoder velocity show positive numbers for positive PID output?
Replied by andypugh on topic 7i77 > Huanyang GT series VFD issues
Even a tiny (0.001) Ki caused the spindle to exponentially increase in RPM.
That suggests that your velocity feedback is backwards.
Does the encoder velocity show positive numbers for positive PID output?
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09 Jun 2018 22:58 #112097
by fungus
Replied by fungus on topic 7i77 > Huanyang GT series VFD issues
andypugh,
I always have a bit of trouble deciphering what's what in the HALScope channels, but abs.spindle.out, lowpass.spindle.out & hm2_5i25.0.encoder.05.velocity are all positive.
I always have a bit of trouble deciphering what's what in the HALScope channels, but abs.spindle.out, lowpass.spindle.out & hm2_5i25.0.encoder.05.velocity are all positive.
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09 Jun 2018 23:10 #112100
by fungus
Replied by fungus on topic 7i77 > Huanyang GT series VFD issues
Include pid.s.command in that. It is also positive. This is while commanding M03 S50, and it is rotating the correct direction for M03.
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