8. COORDINATE SYSTEM
The six workpiece coordinate systems specified with G54 to G59 can be
changed by changing an external workpiece zero point offset value or
workpiece zero point offset value.
Three methods are available to change an external workpiece zero point
offset value or workpiece zero point offset value.
(1)Inputting from the MDI panel (see III–11.4.10)
(2)Programming by G10 or G50
(3)Using the external data input function
An external workpiece origin offset can be changed by using a signal
input to the CNC. For details, refer to the relevant manual supplied
by the machine tool builder.
EXOFS : External workpiece zero point offset value
ZOFS1AZOFS6 : Workpiece zero point offset value
system 1 (G54)
system 2 (G55)
system 3 (G56)
system 4 (G57)
system 5 (G58)
system 6 (G59)
Fig. 8.2.3 (a) Changing an external workpiece zero point offset value or workpiece zero point offset value
G10 L2 Pp _;
p=0 : External workpiece zero point offset value
p=1 to 6 : Workpiece zero point offset value correspond to
workpiece coordinate system 1 to 6
:For an absolute command (G90), workpiece zero point off-
set for each axis.
For an incremental command (G91), value to be added to
the set workpiece zero point offset for each axis (the sum
is set as the new offset).
D Changing by G10
D Changing by G50