Thanks Arturo. I did finally realize that I had not enabled that output. After enabling it, I spent a lot of time trying to figure out what I needed to do on the Mach side (what Mach output to assign it to etc.). As it turns out, there is not one to select for the pwm signal. I finally got my c41s control board to output a variable voltage. Nothing is installed in an electronics cabinet yet, and I still need to make a spindle adapter for my machine and my new spindle, so I will have to test the real setup later. I appreciate you taking the time to respond.
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