Position preset
Selection
#PSET <axis name> <new actual position> ...
A new actual value can be assigned to the current axis position with this NC-command. The resulting offset is called the position preset.

Effectiveness
Active up to cancellation or up to the end of the program.
Travel to the reference point (G74) cancels the position preset.
A new offset does not take effect until programmed in the absolute measurement system (G90).
Cancelling
#PRESET {<axis name><dummy number>}
The position presets are cancelled in all axes if #PRESET is programmed without specifying an axis.