I'm using the microproto driver with Taig's unipolar motors, and I've tried both 1/2 and full step using TurboCNC and Microproto's driver package.
One stepper motor will work okay by itself, and the whole system will work reasonably if you run the speed waaaay down, but I've had problems with running multiple axis cuts (like a radiused corner) with one of the motors stalling and screwing up the cuts. This is cutting 1/16" FR4-G10 material, or aluminum sheet in about the same thickness. The mill will cut it all day long if I only use one stepper motor for power feed. The big problems occur with two or more motors. Makes it hard to cut anything but straight lines. This is with cut speed in the 1-6 IPM range, which I feel is slow.
The table also makes lots of harmonic noises due to the ramp up and down of the motors, and I've had to pick speeds that minimize that effect. I don't think it sounds healthy. When using one motor most of that is elminated.
In my feeble brain, going to servos will make the entire system faster, smoother (no terrible noises), and more precise. Correct my eronious ways...
Thanks, John  |