FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
8. COORDINATE SYSTEM
B–62754EN/01
92
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.
ZOFS2
ZOFS3
ZOFS4
ZOFS5
ZOFS1
ZOFS6
EXOFS : External workpiece zero point offset value
ZOFS1AZOFS6 : Workpiece zero point offset value
EXOFS
Workpiece
coordinate
system 1 (G54)
Workpiece
coordinate
system 2 (G55)
Workpiece
coordinate
system 3 (G56)
Workpiece
coordinate
system 4 (G57)
Workpiece
coordinate
system 5 (G58)
Workpiece
coordinate
system 6 (G59)
Machine zero
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).
G50  _;
8.2.3
Changing Workpiece
Coordinate System
Format
D Changing by G10
D Changing by G50

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