Geo Brick Drive User Manual
Motor Setup
207
Optimization procedure (optional):
Gather velocity versus time data while issuing an open loop command (i.e. #4O25)
Increase the slip gain gradually (small increments~0.00001) until you reach a satisfactory rise
time. Of course, the time constant of the motor should not be violated.
Slip Gain Optimization, Experimental Data:
Note
High slip gain values can cause the motor to hunt and lose
smoothness.
Correcting I2T Settings
The motor continuous current limit has to be corrected for the optimized Ixx77
I458=INT((I469*I469-I457*I457+I477*I477)*ServoClk*1000*I2TOnTime/(32767*32767))
Closed-Loop vs. Open-Loop Operation
AC induction motors with encoder can be commanded to run in either open-loop mode (i.e. #nO25) at a
pre-defined base speed or closed-loop mode at various programmable speeds (e.g. rigid tapping).
Summary of Contents for Geo Brick
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