
B–63523EN–1/03
1. AXIS CONTROL
136
CAUTION
1 If parameter Nos. 7580 to 7588 or a reference fixture offset
value is changed in the G54.2 mode, the new setting takes
effect after the next G54.2Pn command is issued.
2 If changing the fixture offset vector causes movement, the
same mode and movement speed as for the modal setting
of group 01 take effect except for modes (G02, G03, etc.)
other than G00 or G01, in which case movement occurs
temporarily in the G01 mode.
3 If an automatic operation is stopped, for example, with an
SBK stop in the G54.2 mode, and the rotation axis is moved
manually, the fixture offset vector does not change. If a
rotation axis command or G54.2 command is issued during
an automatic operation or MDI operation, vector calculation
is carried out. If a rotation axis command is issued in the
incremental mode (G91) after manual intervention is made
by setting the manual absolute switch to ON, however,
vector calculation is carried out using coordinate values to
which the manual intervention has been reflected, though
this is different from the specification of the FS15.
4 If a block specifies rotation axis movement related to the
fixture offset in the G54.2 mode, vector calculation is carried
out at the end of the block, using the coordinate values of the
rotation axis, and movement is made to a position specified
in the workpiece coordinate system indicated by the vector.
5 Fixture offset calculation uses rotation coordinate values in
the workpiece coordinate system. If an offset such as a tool
offset is in effect, the coordinate values that existed before
the offset was applied are used.
6 If the following commands are issued for the rotation axis in
the G54.2 mode, vector calculation is not carried out for the
fixture offset.
Machine coordinate system selection (G53)
Workpiece coordinate system change (G54 to G59, G54.1,
G92, and G52)
Reference position return (G27, G28, G29, G30, G30.1)
7 No fixture offset rotation axis can be specified to be used
with polar coordinate system interpolation (G12.1).
8 To use the rotation axis roll–over function, be sure to define
a movement amount per rotation axis revolution as 360(.
9 The following functions cannot be specified in the G54.2
mode:
S Program restart function
S Mirror image function
S Scaling function
S Coordinate system rotation function
S High–precision contour control function and AI contour
control function
S Figure copy function
Caution