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

13.FUNCTIONS TO SIMPLIFY PROGRAMMING PROGRAMMING B-63324EN/03
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Fig.13.8 (b) Normal direction control left (G41.1) Fig.13.8 (c) Normal direction control right (G42.1)
Explanation
- Angle of the C axis
When viewed from the center of rotation around the C-axis, the angular
displacement about the C-axis is determined as shown in Fig.13.8 (d).
The positive side of the X-axis is assumed to be 0 , the positive side of
the Y-axis is 90deg, the negative side of the X-axis is 180deg, and the
negative side of the Y-axis is 270deg.
Fig.13.8 (d) Angle of the C axis
- Normal direction control of the C axis
When the cancel mode is switched to the normal direction control
mode, the C-axis becomes perpendicular to the tool path at the
beginning of the block containing G41.1 or G42.1.
In the interface between blocks in the normal direction control mode, a
command to move the tool is automatically inserted so that the C-axis
becomes perpendicular to the tool path at the beginning of each block.
The tool is first oriented so that the C-axis becomes perpendicular to
the tool path specified by the move command, then it is moved along
the X- and Y axes.
In the cutter compensation mode, the tool is oriented so that the C-axis
becomes perpendicular to the tool path created after compensation.
In single-block operation, the tool is not stopped between a command
Center of the arc
Programmed path
Cutter center path
Programmed path
Cutter center path
Center of
rotation
+Y
180°
+X
270°
0°
90°

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