I'm using a dc motor & a servo amp to run the lead screw on my lathe. The servo amp is an Advanced Motion Controls model 25A20:
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I'm setting the speed with an analog input on pins 4 & 5 ("REF"). This is described as "Differential Reference Input (±10 V Operating Range, ±15 V Maximum Input)". My assumption was that this voltage could go to
15v, but beyond 10v there would be no additional effect on the output. I was wrong. The output continues to increase as REF increases to 15v. I didn't check if it was linear in the 10 - 15v range.
The question is: is it a bad idea to use it in the 10-15v range? It might be useful to have the extra output in certain special cases. E.g. rapid reverse.
Thanks, Bob
PS - is there another NG that might be better posted to?