
B-63323EN-1/03 1.AXIS CONTROL
- 159 -
1.6.2 Workpiece Coordinate System/Addition of Workpiece
Coordinate System Pair
General
A coordinate system used for machining a workpiece is referred to as a
workpiece coordinate system. A workpiece coordinate system is to be
set with the CNC beforehand (setting a workpiece coordinate system).
A machining program sets a workpiece coordinate system (selecting a
workpiece coordinate system). A set workpiece coordinate system can
be changed by shifting its origin (changing a workpiece coordinate
system).
Setting a workpiece coordinate system
A workpiece coordinate system can be set using one of three methods:
(1) Method using G92
A workpiece coordinate system is set by specifying a value after
G92 in the program.
(2) Method of using G54 to G59
Six workpiece coordinate systems are set in advance, using the
MDI panel, and the workpiece coordinate system to be used is
selected using program commands G54 to G59.
Selecting a workpiece coordinate system
The user can choose from set workpiece coordinate systems as
described below.
(1) Selecting a workpiece coordinate system set by G92
Once a workpiece coordinate system is selected, absolute
commands work with the workpiece coordinate system.
(2) Choosing from six workpiece coordinate systems set using the
MDI panel
By specifying a G code from G54 to G59, one of the workpiece
coordinate systems 1 to 6 can be selected.
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
Workpiece coordinate system 1 to 6 are established after
reference position return after the power is turned on. When the
power is turned on, G54 coordinate system is selected.
Changing workpiece 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