Programs always exceed positive Z limit at end

Try the MAX_LIMIT limit at -6

Can you explain your thinking here? Thanks.

BTW, I finally figured out what was going on. In Fusion 360, I had defined the “Machine Configuration.” This includes a Home Position for each axis, and mine was set to 15 mm for some reason. The post processor would issue a move to the machine configuration’s home position at the end of each program, thus exceeding the limit. Not sure why loading the program wouldn't trigger a warning, though. But fixing the Machine Configuration in Fusion 360 fixed this problem.

It may not be appropriate to mention here, but my limit was also set to g53 z0 and about 20% of programs would have an exceed positive Z limit. Moving g53 z0 to 0.001 below the machine limit solved the problem, but bumped it to 0.010 just cause. Perhaps there is floating point error accumulation in the limit checking code? (Axis and recent build of LinuxCNC 2.8)