I had discovered some issues I was encountering on my machine which mostly were corrected after tightening up some screws, but I still see that though most cuts have improved significantly, my machine still doesn't cut an exact circle when I attempt to do so. So that you know what type of machine I have and what I am experiencing I will submit a brief summary of my machine, its electronics, hardware & software, include a picture of it, and include a picture of the result of the piece I just cut which is not perfectly round. Any assistance you might be able to provide using the information I have provided would be appreciated. I'm thinking it may still be some loose screws or that I possibly don't have one of the motors set exactly correct regarding steps/unit. I still have to go back and check the latter as I switched it once and attempted quickly to return it to the settings it had originally.
I built my own machine. It has an ESS ((Smooth Stepper) motion controller connected to a PMDX-126 BOB. I’m running a three axis machine using Mach 4 controller software. The external drivers are all DM542T stepper drivers with dual 425 oz-in NEMA 23 steppers driving 2010 Ballscrews on linear rails. The X axis is a smaller torque NEMA 23 driving a 1605 ballscrew on linear rails and the Z axis is a NEMA 34 driving a 1204 ballscrew on linear rails. The frame is made of 80/20 aluminum extrusion (profile 3030). I’ll include a photo:
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