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Ok. When you measured your draw were you running the servo on the machine, or just sitting at idle?

Yes.

According to the website they are
Single/Three-Phase 110~240VAC ± 10% 50/60Hz input

LTDan, what size contactor and circuit breaker would you recommend for 3 750w drives on 120v?

Cool! I've been thinking of doing something similar to what you built. How do you like it so far? Is there anything you would do different?

Somewhere else I had read they were a Chinese knockoff of the KBMM or KBIC, but that's a good point about the Inhibit connections that I hadn't thought about.

http://www.kbelectronics.com/manuals/kbic_manual.pdf
KBIC-125 is very similar to what I have. I have been unable to track down a manual using the other part number.

the original Potentiometer is 4700ohms.

Specs on the board are:

Model: JYMC-220B-II
Input: 115VAC-50/60 HZ
Output: 0-90 VDC
Rated: 13.5 ADC
Yangzhou Jiayi Mechano-electronics Institiute

Ok, I'm not sure what I did, but now it's running at 2184 with a S2500, maybe the program needed to be restarted? Anyway, is there a way to fine tune the numbers a little closer?

Hi Tom.

The 11.19v on pin 5 and 7 was before the program runs. Checking with the program running it is 4.462v on pin 5 and 7, 3.472v on pin 6 and 7. I changed the RefVoltage to 4.462f, and...

Do I need to add this C program to get my voltage corrected, or am I missing something else?


// PWM->Analog Correction

//

// assume very non-linear for first few count and linear...

Currently I have connected JP33 Pin 7 to KBIC P3 and JP33 Pin 5 to KBIC P1 on Kstep. Measuring voltage across Pin 5 and 7 I have 11.09V, From Pin 6 to Pin 7 I have 3v instead of 5V. From this point...