After I make the rough pass and change the bits I take special pains to make sure I am at home position. However, the detail pass is off slightly. This is happened to me twice now.
Any suggestions?
How are you zeroing your bit?
Well something must be moving a little when you are changing bits. I would start in the lower left corner and use the 3 axes touch plate. Then to be sure you are where you started after i change bits i would use it again so i know it is where it should be. Zeroing in the middle you are going by eye and you coulld be just a little off as you can see. Possibly you may have lost a step somewhere along the carve and when it returned you would be off just a little.
This explains a common problem and solution to what you’re seeing: