API American Precsion CMD 50-C stepper drive specs

[vladdy]

I have not been able to find any specs on these old drivers, would like to find max voltage in and ROI current set resistor chart..
thanks

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[naldarn]

I have not been able to find any specs on these old drivers, would like to find max voltage in and ROI current set resistor chart..
thanks

I know this is reviving a dead post, and hoping that the info can be used by others. I found most of this info when I first purchased the CMD-50c controllers, and used it for running my cnc router. The main info needed is the ROI current limiting resistor values, which is in the cntrllr.pdf attachment.

If anyone has any of these wasting away in storage, I hope this makes them useful. I am interested in getting more if anyone wants to get rid of them.

DRIVE TYPE .............................. 2 phase, bipolar, constant current, MOSFET chopper, 20 KHz fixed.
RESOLUTIONS .......................... 200 and 400.
POWER Inputs........................................ 15-40 VDC, +5VDC for Logic 100mA min.
Output ....................................... 0.3-3.5 amps/phase.
LOGIC INPUTS Type .......................................... TTL compatible. Need to sink 15mA.
Step........................................... Square wave - 10µS minimum width. Step on trailing edge. Optically isolated.
Direction.................................... CW/CCW. Optically isolated.
Step Mode................................. HALF/FULL. Optically isolated.
No Power .................................. ENA/NOPWR.
Current Mode............................ CIRCULATING/NON-CIRCULATING.
Reset ......................................... NORMAL/RESET. Optically Isolated.
MOTORS ................................... Maximum current rating of 3.5 amps/phase unifilar, 5.0 amps/phase bifilar. Minimum inductance of 0.5µH unifilar, 0.7µH bifilar.

Amps
per
Phase Ohms
0.3 69.8k
0.4 56.2k
0.5 44.2k
0.6 37.4k
0.7 31.6k
0.8 27.4k
0.9 24.3k
1 21k
1.1 20k
1.2 18.2k
1.3 16.2k
1.4 15.8k
1.5 14.7k
1.6 13.7k
1.7 12.7k
1.8 11.8k
1.9 11.3k
2 10.7k
2.1 10.2k
2.2 9.76k
2.3 9.31k
2.4 8.87k
2.5 8.45k
2.6 8.25k
2.7 7.87k
2.8 7.5k
2.9 7.32k
3 6.98k
3.1 6.81k
3.2 6.65k
3.3 6.34k
3.4 6.19k
3.5 5.9k

[vladdy]

nope ... not dead... just real quiet , lol
thanks for the pdf file, still have three of these