
B–63682EN/01
20. AXES CONTROL
NC FUNCTION
145
G41.1 and G41.2 are used to control the rotation axis (C–axis) so that the
tool is kept vertical to the direction in which it advances during cutting
operation.
G40.1
Normal–line direction control cancel mode
(Normal–line direction control is not performed.)
G41.1
G42.1
Left–side normal–line direction control turned on
(The tool is kept vertical to the direction of travel at the left as
viewed when facing forward.)
Right–side normal–line direction control turned on
(The tool is kept vertical to the direction of travel at the right as
viewed when facing forward.)
The tool is kept vertical to the direction of travel in the X–Y plane. The
rotation angles of the C–axis are defined as viewed from the rotation
center. In the following figure, the positive X–axis is defined to be at 0
degrees. The rotation angles are incremented counterclockwise. So, the
positive Y–axis, the negative X–axis, and negative Y–axis are defined to
be at 90, 180, and 270 degrees, respectively. When transition occurs from
the cancel mode to the normal–line direction control mode, the C–axis
becomes vertical to the direction of travel at the beginning of a block
where G41.1 or G42.1 is issued.
As the direction of travel changes between blocks, C–axis movement
commands are inserted automatically so that the C–axis becomes vertical
to the direction of travel at the beginning of each block.
+Y
+X
0°
90°
180°
270°
Rotation center
20.12
NORMAL–LINE
DIRECTION
CONTROL
(G40.1, G41.1, G42.1)
Format