CNC router Drifting between depth passes Please Help
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I recently built a custom CNC router using open loop steppers, GRBL, an Arduino and Universal G Code Sender. I am attempting to use Fusion 360 to generate tool paths which i then input into UGS. Whenever I use G code generated by F360 CAM my pockets will have a stair step look to them (on two sides of this hexagon pocket) but when I use the built in tool path generator in UGS I get perfect pockets with perpendicular walls. This makes me think it's a software problem rather than mechanical or electrical as when I switch software the problem pops up. It loos like the machine shifts over about 0.3mm between each depth pass. Has anyone had any similar problems?
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