Thanks in advance for any answers.

In regards to a Daewoo, HP5100 Horizontal Machining center with a Fanuc control. We have a "Rotation Macro" that helps keep track of G54 offsets as the B axis is rotated around, even when the fixture cannot be put on the Tables centerline. The macro apparently uses some type of X axis parameter that represents the Table Centerline compared to the Spindle Centerline. The CNC operator and Programmer have not been able to find where X-axis Table Center of Rotation number is stored in the machines parameters. After a re-level and a spindle rebuild, it appears that this number needs to be adjusted so that the Rotation macro has the correct number to do the calculations. The machine is now about .0045 inch off when the B axis is rotated 180 deg.

Any help would be greatly appreciated.