I guess the biggest question is, are you still loosing steps or has that problem went away? We only needed a fan because we are pushing the nema 17 with higher amps then what the ratings are so it's very responsive to the movement and changes in directions.
Jeff It is looking real good but I do think it was the stepper driver that was my problem. That flex coupling probably broke when I was running the Acceleration to high. When I first hooked it up I got stupid. You ever got stupid ? its sort of fun. I ran it all day yesterday and didn't loose a step in A Thanks again Jerry