The drives I looked at were AC sinusoidal which should be very smooth down to zero speed, if the earlier ones are BLDC then cogging is normal at low speed.
If you have very sloppy feel to it when you try and turn the shaft then that is probabally a tuning issue.
Al
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |