Placing the Part on the Machine

All the GPP2 processing takes place relative to REF UCS and its zero point. The machine is also calibrated so that the (0,0,0) is located at the REF UCS origin.

However, the machine kinematics and the location of rotary axes cannot be calibrated. The machine Anchor Point (red point) is always located at the same physical location.

In order to properly calculate the correct position of points when the table is rotated, it is necessary to know the relation between the REF UCS and the machine Anchor Point. This can also be considered as defining the part location on the machine.

GPP2 uses a distance vector, X_MACH, Y_MACH and Z_MACH to define the location of the Anchor Point relative to the REF UCS.

This is only relevant for machines with no table RTCP. If the table or full RTCP (M128) is used, then the machine controller handles the corrections by itself.