Avid CNC MACH4 Z DEPTH TROUBLE

[poolrod2]

This is killing me, the z zero is set off the locating surface, it is the same G54 Z-6.0880 and has ran the same jobs for 5 years. For some reason the Y changed by around .040 thou and so I added .040 to my Y value in G54 and set my Z to -5.0880 to run the cutter an inch above the part so I could watch the cutter and make sure my Y shift was the correct direction and even after I set my Z back to -6.0880 it runs all programs an inch above the part. This is so crazy. My touch plate is accurate, I even manually set the tool and it matched the touch plate Z. I even put the Y offset back in case that confused the controller ha ha. I would hate to lie to the machine and set it at -7.0880, that could leave a mark at some point in time. Any help would be great and thank you.