CNC machine producing parts 0.3mm out of tolerance after relocation

What we told them

Consistent error in one direction is a setup problem, not a wear problem — wear drifts, setup offsets. After a move the two usual causes are an unlevel base and a lost work-offset reference. Level the machine properly with a precision level in both axes before touching the controller; a twist of a few tenths across the bed is enough to produce exactly this. Re-probe the reference only after the base is true.