B-63324EN/03 PROGRAMMING 13.FUNCTIONS TO SIMPLIFY PROGRAMMING
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13.8 NORMAL DIRECTION CONTROL (G40.1, G41.1, G42.1)
When a tool with a rotation axis (C-axis) is moved in the XY plane
during cutting, the normal direction control function can control the
tool so that the C-axis is always perpendicular to the tool path (Fig.
Between blocks in normal direction control mode, movement on the
C-axis is inserted so that, as the move direction changes, the tool is
positioned perpendicular to the move direction at the start point of each
Fig.13.8 (a) Sample Movement of the tool
G code Function Explanation
Normal direction control left
Normal direction control right
Normal direction control cancel
If the workpiece is to the right of the tool path
looking toward the direction in which the tool
advances, the normal direction control left
(G41.1) function is specified.
After G41.1 or G42.1 is specified, the normal
direction control function is enabled (normal
direction control mode).
When G40.1 is specified, the normal
direction control mode is canceled.
Programmed tool path
(in which the tool moves)