
PROGRAMMING7. COORDINATE SYSTEM
B–64154EN/01
72
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 NC 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).
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) Automatic setting
If bit 0 of parameter No. 1201 is set beforehand, a workpiece
coordinate system is automatically set when manual reference
position return is performed (see Part III–3.1.).
(3) Method using G54 to G59
After six workpiece coordinate systems are set from the MDI panel,
the program commands G54 to G59 are used to select which
workpiece coordinate system is used (see III–11.4.7). Before
specifying the absolute command, use one of the above methods to
establish the workpiece coordinate system.
(G90) G92 _IP
A workpiece coordinate system is set so that a point on the tool, such as
the tool tip, is at specified coordinates.
Cutter compensation is cancelled temporarily with G92.
M.S and T code cannot be specified in G92 block.
1270.0
X
Y
1016.0
G92X1270.0Y1016.0 ;
Meet the programming start
point with a center of the tool
and command G92 at the start
of program.
7.2
WORKPIECE
COORDINATE
SYSTEM
7.2.1
Setting a Workpiece
Coordinate System
Format
D Setting a workpiece
coordinate system by G92
Explanations
Examples