HEIDENHAIN SW 548328-05 DIN Programming - Manual (Page 251)

HEIDENHAIN MANUALplus 620, CNC PILOT 620/640
251
4.13 Zer
o
point shif
ts
4.13 Zero point shifts
You can program several zero shifts in one NC program. The
relationships of the coordinates (for blank/finished part, auxiliary
contours) are retained by the zero offset description.
G920 temporarily deactivates zero point shifts—G980 reactivates
them.
Overview of zero point shifts
G51:
 Relative shift
 Programmed shift
 Reference: Previously defined workpiece zero point
Page 252
G56:
 Additive shift
 Programmed shift
 Reference: Workpiece zero point defined at present
Page 253
G59:
 Absolute shift
 Programmed shift
 Reference: Machine zero point
Page 254