I have a CNC lathe with GEC Gem servos that has sat idle for a few years and I'm about to power it up. If it was single phase I'd run it up slowly on a variac to allow the capacitors a chance to re-form, but of course it is three phase. Any suggestions? I do have a single variac, suppose I did a slow voltage ramp one at a time?
This is the lathe with the Micon /Numericon 850 CNC controller that I asked about six weeks ago. I've spent that time mapping out 6 of the 11 circuit boards, producing circuit diagrams, which has allowed me to work out the memory map, and follow the firmware's start up sequence to trace faults. This has revealed 6 faulty i/cs which having changed I now can get the controller to display sensible responses to my input. No idea if the output to the servo amps will be sensible, but I'm about to take the plunge!