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

7.COORDINATE SYSTEM PROGRAMMING B-63324EN/03
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7.2.6 Workpiece Coordinate System Preset (G92.1)
The workpiece coordinate system preset function presets a workpiece
coordinate system shifted by manual intervention to the pre-shift
workpiece coordinate system. The latter system is displaced from the
machine zero point by a workpiece zero point offset value.
There are two methods for using the workpiece coordinate system
preset function. One method uses a programmed command (G92.1).
The other uses MDI operations on the absolute position display screen,
relative position display screen, and overall position display screen
(Operation II-10.5.2).
Format
G92.1 IP 0;
IP 0 ; Specifies axis addresses subject to the workpiece
coordinate system preset operation.
Axes that are not specified are not subject to the preset
operation.
Explanation
When manual reference position return operation is performed in the
reset state, a workpiece coordinate system is shifted by the workpiece
zero point offset value from the machine coordinate system zero point.
Suppose that the manual reference position return operation is
performed when a workpiece coordinate system is selected with G54.
In this case, a workpiece coordinate system is automatically set which
has its zero point displaced from the machine zero point by the G54
workpiece zero point offset value; the distance from the zero point of
the workpiece coordinate system to the reference position represents
the current position in the workpiece coordinate system.
If an absolute position detector is provided, the workpiece coordinate
system automatically set at power-up has its zero point displaced from
the machine zero point by the G54 workpiece zero point offset value.
The machine position at the time of power-up is read from the absolute
position detector and the current position in the workpiece coordinate
system is set by subtracting the G54 workpiece zero point offset value
from this machine position. The workpiece coordinate system set by
Reference position
G54 workpiece coordinate system
Reference position
Manual reference position return
Machine zero point
G54 workpiece zero
point offset value

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