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Guys, it turns out the screws were loose. They're made of aluminum flat bars and 4080 profile; they weren't properly aligned and were twisting the bars where the motors are attached, causing the ball...

Thank you for the response.

I also thought it might be a flexing issue, so I reinforced the Z-axis, which was the weakest. However, it's still the same. The entire machine is made of 3/8" thick...

Hey folks, can anyone help me out?

I'm almost done assembling a CNC machine, but I've run into a single issue: the machining is offset by approximately +-0.5 mm.

When I mill a pocket, it...