Hello Motoman robot experts,
I have a Motoman SV3X with XRC controller that I've never powered up before. Before powering it up, I have some questions about power requirements. This is in my home shop. I'm hoping to power the robot with a rotary phase converter. At the fuses, I measure 240v phase-to-phase, which seems in line with the XRC manual's voltage range (albeit toward the high side). However, the manual says the phase-to-ground measurements should be 220v between R-G and T-G, but 0v between S-G. My phase to ground voltages are more like 120,120,208 (standard for this type of rotary phase converter). Am I going to run into trouble with this? Does the XRC measure, or expect, specific ground-relative voltages? If so, what is the best way to convert single phase to three phase in a way that the XRC will tolerate?
Update: reading up on this, I see that this configuration is call "corner grounded delta." Also, my XRC controller has a transformer, which was originally wired for 480v. I switched to the 240v taps. The docs suggest the output of the transformer is 208v delta-wye (at least that's how I'm reading the star symbol). Does anyone have any experience with this?
Update2: measured the phase-to-phase voltages at the QS2 fuses and get about 210v for all three. phase-to-ground voltages at QS2 are all around 120v.
I decided to go ahead and flip the switch and... it seemed to boot up fine, but immediately I get two alarms: 4311 and 4107. I'm guessing the encoder battery is dead... the robot sat for eight years in my garage. Replacing the battery (batteries?) is next?
It's progress, I suppose.
I'm still concerned about the turning on the servos with my non-corner-grounded-delta power supply. Should I be?
Thanks for any help you can offer,
Geoff