Check your g-code first.
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I am new to CNC and just bought a custom built 4-axis machine 400x600mm. Machine is built by a CNC company in Thailand using parts from China. It is well built and has been performing perfectly until three days ago. It worked just fine for two weeks but now it loses its material origin and cuts oblong holes instead of perfect circles see pictures.
Tried today cutting a bigger hole 1 1/2" and ended up with this result.
I have virtually no backlash. Machine calibrated ok. Ball screw oiled.
Using ArtCam 9 Pro and Mach3
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Check your g-code first.
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