
6. COORDINATE SYSTEMS
B–63122EN/01
NC FUNCTION
46
When manual reference position return is performed, a workpiece
coordinate system can be set automatically so that the current tool
position at the reference position becomes a desired position which is set
using a parameter in advance. This functions as if G92IP__; were
specified at the reference position.
Set six coordinate systems specific to the machine in advance. Then,
select one of the six coordinate systems by using G54 to G59.
G54
G55
G56
G57
G58
G59
_ ;
G54 Workpiece coordinate system 1
G55 Workpiece coordinate system 2
G56 Workpiece coordinate system 3
G57 Workpiece coordinate system 4
G58 Workpiece coordinate system 5
G59 Workpiece coordinate system 6
Set the distance between the machine zero point and the zero point of each
of the six coordinate systems (offset from the workpiece zero point) in
advance.
There are two setting methods.
Using the CRT/MDI
Using a program (See Section 6.4.)
Workpiece coordinate systems 1 to 6 are established properly when return
to the reference position is performed after power is turned on.
Immediately after power is turned on, G54 is selected.
The six workpiece coordinate systems can be shifted by a specified
amount (external offset from the workpiece zero point).
ZOFS1
Machine reference position
EXOFS : External reference offset value
ZOFS1 to ZOFS6 : Workpiece reference position offset value
Workpiece
coordinate 1
(G54)
ZOFS2
ZOFS3
ZOFS4
ZOFS5
ZOFS6
EXOFS
Workpiece
coordinate 2
(G55)
Workpiece
coordinate 3
(G56)
Workpiece
coordinate 4
(G57)
Workpiece
coordinate 5
(G58)
Workpiece
coordinate 6
(G59)
6.2.2
Automatic Coordinate
System Setting
6.2.3
Setting a Workpiece
Coordinate System
(Using G54 to G59)
Explanations
Setting a workpiece
coordinate system
Format
Shift of workpiece
coordinate systems