6. REFERENCE POSITION
The reference position is a fixed position on a machine tool to which the
tool can easily be moved by the reference position return function.
For example, the reference position is used as a position at which tools
are automatically changed. Up to four reference positions can be
specified by setting coordinates in the machine coordinate system in
parameters (No. 1240 to 1243).
Machine zero point
3rd reference position
2nd reference position
Fig. 6 (a) Machine zero point and reference positions
D Reference position