sreid,
Yes that is what I have been zeroing in on, thinking the problem was there. I believe the rest of the machine is fine since none of the other devices are failing in any matter. One change that I have done was to isolate the DC supply that feeds the Delta Tau breakout boards, separate...
Thanks for all the feedback so far, the ideas are changing my thought process some. An answer to some of the above questions.
The machine has 12 VFD's, 4 7.5HP, 2 10-HP, and 6 20HP, and the 120 circuit that feeds the CPU with the delta tau controller in it, is on a 5A control concept filter...
I do not have any means to check the harmonic distortion.
The VFD's are fed directly from the incoming 480VAC, through proper protection, and the servo drives are fed off a step down transformer (480 Primary / 230/120 secondary), which is branched off the main 480VAC source.
I have a machine in the field exhibiting an erratic behavior, 480VAC/200A. There are multiple VFD’s and servo axises on the machine. The VFD’s are common in one MCC and all the servo amps are located on separate panels in the machine. Half of the servo drives are 230VAC AB 3000 indexing and...
