My progress on my little mill project has been slowed of late my distraction and indecision.
My tuning resistors came this week as well as some insulating board that I want to mount my stepper motors on.
At the moment, I’m sort of looking at my next steps for Spindle Drive.. I’ve been done preliminary research on this stuff and I guess the Sherline drives are controlled by a KBIC controller from Kb Electronics. Speed can be controlled via a potentiometer or by controlling a voltage.
I found an interesting post here.. http://www.wallacecompany.com/machine_shop/kbic/
I guess a lot of people will take a pwm signal generated from there controller software and convert it to a voltage and plug it into their kbic.
The link up above claims that for the same price I could just go with PWM.
Since the mill came to me only with steppers and spindle drives, I wonder if getting a kbic is the best solution to me. In the back of my mind is that steppers are a first step and servos would be a second. I think I need to see what people are doing driving there sherline motors with non-kbic solutions. A little more research is needed here.