Lab13b question

David Hackenbracht1

I have a lab13b question.

I have gone through 13b but I noticed that if you change "set gMotorVars.PosTStepInt_MRev" to more than 20 the motor I have starts to "thrash" around. This is after making all the changes for velocity, acceleration and jerk limits.

Is this normal?

Thanks,

David

over 12 years ago

0 Adam D. Reynolds over 12 years ago

Guru 12800 points

David,

I don't think that this is normal. My expectation is that the limits on velocity or acceleration are higher than what the system is physically capable of. When this happens your motor is unable to keep up with the reference and it will shut the controller when the position error is greater than the maximum (set to 2 mrevs in the lab projects).

I would reduce the velocity & acceleration and try this again.

0 David Hackenbracht1 over 12 years ago in reply to Adam D. Reynolds

Expert 1410 points

Adam,

Ok, you are right. works better that way

Thank you,

DAvid

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Lab13b question