PROGRAMMING
7. COORDINATE SYSTEM
B–63664EN/02
90
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).
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 SPR No. 1201 is set beforehand, a workpiece
coordinate system is automatically set when manual reference
position return is performed (see Part III–3.1.).
This function is, however, disabled when the workpiece coordinate
system option is being used.
(3) Input using the MDI panel
Six workpiece coordinate systems can be set beforehand using the
MDI panel (see Part III–11.4.5.).
When using an absolute command, establish the workpiece
coordinate system in any of the above ways.
(G90) G92 IP_
IP
A workpiece coordinate system is set so that a point on the nozzle, such
as the nozzle tip, is at specified coordinates. If a coordinate system is set
using G92 during nozzle length offset, a coordinate system in which the
position before offset matches the position specified in G92 is set.
Cutter compensation is cancelled temporarily with G92.
7.2
WORKPIECE
COORDINATE
SYSTEM
7.2.1
Setting a Workpiece
Coordinate System
Format
D Setting a workpiece
coordinate system by G92
Explanations