Advice on using a servo as a spindle
Hi John,
The reason why it faults when you reverse the spindle speed is that the servo cannot respond quickly enough to the change in direction. You’ll need to reduce the acceleration for the spindle axis, so that the spindle can keep up with the commanded changes.
This may also be the issue for why it faults at higher speeds.
Also look at the manual for the G320X. Dip switches 4 and 5 set how many encoder counts the motor position can be behind the commanded position before the drive faults.
From memory, it is set to 256 from the factory.
Set it to something larger like 1024 or 2048. This will make it less sensitive to rapid changes in speed. It will also help with changing cutting loads.
Then there is also the drive tuning. It could be that the tuning is too soft so the motor is not keeping up with the commanded changes. You might need to stiffen the drive response by increasing the P parameter, then the D parameter to tune out any overshoot.
Also reduce the encoder count setting to 512 or 256.
Cheers
Peter.
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