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First I want to apologize, but I am a greenhorn in the world of CNC. I have been using my Xcarve (1000X1000) without an issue. The last two pieces I’ve tried to cut have been terrible on the flat surfaces. I have the Dewalt 611, 1/8" straight bit, Recommended settings, and the router speed set at 2. I replaced the bit and checked the collet, it’s tight. I’m not sure what to do. Any suggestions are appreciated. Thank you!
I suspect your z axis is loose. Specifically the Z pulley set screws and lock nut on top.
Check to see if you can move the spindle up and down by hand while observing the parts listed above.
Also…check your Y-axis eccentric nuts on the bottom wheels. If loose, they’ll cause the X axis gantry to rotate as the Z axis plunges into the material.