Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 7.COORDINATE SYSTEM
- 201 -
these operations is shifted from the machine coordinate system using
the commands and operations listed following case.
(a) Manual intervention performed when the manual absolute signal
is off
(b) Move command executed in the machine lock state
(c) Movement by handle interrupt
(d) Operation using the mirror image function
(e) Setting the local coordinate system using G52, or shifting the
workpiece coordinate system using G92
In the case of (a) above, the workpiece coordinate system is shifted by
the amount of movement during manual intervention.
In the operation above, a workpiece coordinate system once shifted can
be preset using G code specification or MDI operation to a workpiece
coordinate system displaced by a workpiece zero point offset value
from the machine zero point. This is the same as when manual
reference position return operation is performed on a workpiece
coordinate system that has been shifted. In this example, such G code
specification or MDI operation has the effect of returning workpiece
coordinate system zero point WZn to the original zero point WZo, and
the distance from WZo to Pn is used to represent the current position in
the workpiece coordinate system.
Bit 1 (DSE) of parameter No. 2202 specifies whether to preset relative
coordinates (RELATIVE) as well as absolute coordinates.
Limitation
- Cutter compensation, tool length compensation, tool offset
By specifying G92.1, cutter compensation, tool length compensation,
and tool offset are cancelled.
- Program restart
The workpiece coordinate system preset function is not executed
during program restart.
- Prohibited modes
Do not use the workpiece coordinate system preset function when the
scaling, coordinate system rotation, programmable image, or drawing
copy mode is set.
Amount of
movement
during
manual
intervention
WZn
Machine zero point
Workpiece
zero point
offset value
Wzo
G54 workpiece
coordinate system
before manual
intervention
G54 workpiece
coordinate
system after
manual
Po
Pn

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