Hi there
Does anyone know why my machine (Gen2 elite with Redline Controller) suddenly lost Z0 mid job? It was working through the final pass on the final step of a multi step project using a cut out tool path with tabs when suddenly it just ramped down about 1/4” into my wasteboard!! Everything looks normal in the GCode and on the HMI screen. I have included photos of the issue and the HMI screen taken right after I stopped the program.
Go back to the beginning of your file and look at the part of the Gcode where it specifies the thickness of the material…how does that compare with the actual thickness of the workpiece?
Could it be bit slippage?
This is not the issue as it was on the last pass of multiple parts, all of which were cut to the right depth.
That’s what I initially thought as I’ve had that before, with spectacular results! I now don’t use the ATC for 1/2” bits as it doesn’t torque them enough 
Continuing the discussion from Lost Z0 mid job:
Ok, so it has repeated this behaviour twice today and both times my Z switch crashed and wouldn’t reset unless I unplugged it and plugged it back in, at the head end.
suppose you checked but the bits are not coming loose are they???that’d also explain why it happens with 1/2" bits???
pat
Nope, not this time. I’ve learnt my lesson with that and no longer use them in the ATC!!
Mike
Do you have the Z axis cover? (Gen 2 Z axis Homing Sensor Cover .STL)
I realize that is a fix for Z homing, as opposed to losing Z in the middle of the job, but it’s the only Z intermittent issue that I’ve run across since I’ve been active on the forum for last 10 months or so. Your comment about the Z sensor crashing and needing to be unplugged to reset it is what made me think of this.
Could it be you’re ..speed per revolution ..setting
