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Long time xcarve and easel pro user. I carve hundreds of flags and other things.
Randomly though one of my fkag files I’ve used a lot, halfway through the derail carve with a v bit the machine starts to carve like 1/2” deep rather than the set .055 deep. Ridiculously deep. It has done this on another file separate from this one, in a very similar way.
Different wood. Different files. Different times. All with a 60 degree v bit in the detail stage it just starts to carve crazy crazy deep.
I checked the collet, it’s definitely tight both times.
Possibly the collet that attaches the Stepper to the Lead screw, especially if this X-Carve has the newer version Z axis. quite a few people have reported this coming loose (seems to not have been tightened properly at the factory maybe) IF it’s the new Z anyway.
That would certainly cause the issue here. With that loose the Z can just drop when gravity wants it to, only slight friction is applied to actually lift the gantry up and it would certainly slip more than lift…