I'm a novice in the motion control area, so this is my first "have to know" about this topic. Any help I really appreciate.

Through last year, the plant experienced a lot of issues with a servo system damages ($$), so a few days ago, a technician found out that the resistance of the servomotor was different from the adjustable resistance of the amplifier card, so he matched the resistance values and for the graphics I VS time, looks like the current is under control. Before that change was implemented the graphics showed current spikes.

So before to implement this 'solution' to the rest of the equipment I'd like to know your opinion about what could be causing current spikes in the amplifier and why the overcurrent/overheat/overvoltage protection of the amplifier did not work.

 

Based on the information that you have listed, it sounds like your tech improved the current loop tuning. That will have benefits in motor performance. It sounds like a good thing to me.

 

Current = torque.
Check your error voltage against your current plot.

Regards

cww