[SpaceCase614]

I built a gantry style mill. I surfaced the spoilboard no problem. I've tried a few times now to cut out my first project and here is what's happening. I have it set to relief cut with a 1/4" bit and it's set to make multiple passes at an increasing depth of 1/8" so it would be three passes to get to it's final depth of 3/8". It makes the first several lines no problem with the proper depth and then Mach seems to be adjusting the depth and before I know it it thinks 0 it's 1/4" below the actual work 0. It progressively gets worse and I can't figure it out. It's cutting an area 12 x 10 and it will cut out 12 x 3 of it on it's first pass before it starts going wrong. I can't see anything in the G-Code that is adjusting what Z is to change where it thinks zero is. Any ideas? When I run it in the simulation it looks perfect. In Mach it looks good too but the z position changes. I've tried to run this 3 times, each time I recompile the g-code from ArtCam and each time it messes up.


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