B–63832EN/01
21. AXES CONTROL
NC FUNCTION
209
The rotation axis (C axis) can be controlled by commanding the G41.1 or
G42.1 so that the tool constantly faces the direction perpendicular to the
advancing direction during cutting.
: Normal direction control cancellation mode
(No normal direction control can be performed.)
: Normal direction control left side on
(Control is made to allow facing perpendicular to advancing
direction to the left)
: Normal direction control right side on
(Control is made to allow facing perpendicular to advancing
direction to the right)
G40.1
G41.1
G42.1
In the normal direction control, control is made so that the tool may be
perpendicular to the advancing direction on the X-Y plane.
With the angle of C axis, the +X direction is defined to be 0 degrees
viewed from the rotation center of C axis. Then, the +Y direction, –X
direction, and –Y direction are defined to be 90, 180, and 270 degrees,
respectively.
When shifting to the normal direction control mode from the cancellation
mode, the C axis becomes perpendicular to the advancing direction where
the G41.1 or G42.1 is at the starting point of commanded block.
Rotation
center
+Y
+X
0°
90°
180°
270°
Between blocks, the traveling of C axis is automatically inserted so that
the C axis faces the normal direction at the starting point of each block
according to the change of traveling direction.
Normal direction control is performed for the path after compensation
during the cutter compensation mode. The feed rate of rotation of C axis
inserted at the starting point of each block becomes the federate set by
parameters. However, when dry run is valid, the feed rate is set to the dry
run rate. Also, in the case of rapid traverse (GOO), it becomes the rapid
traverse rate. In the case of circular command, the C axis is allowed to
be rotated first so that the C axis faces perpendicular to the circular starting
point. At this time, the C axis is controlled so that it constantly faces the
normal direction along with the move of circular command.
21.6
NORMAL DIRECTION
CONTROL
(G40.1,G41.1,G42.1)
(M series)
M series
Format