FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
15. COMPENSATION FUNCTION
B–62764EN/01
360
Center of the arc
Fig15.11 (c) Normal direction control right (G42.1)
Programmed path
Cutter center path
Fig15.11 (b) Normal direction control left (G41.1)
Cutter center path
Programmed path
When viewed from the center of rotation around the C–axis, the angular
displacement about the C–axis is determined as shown in Fig. 15.11 (d).
The positive side of the X–axis is assumed to be 0 , the positive side of
the Y–axis is 90°, the negative side of the X–axis is 180°, and the negative
side of the Y–axis is 270°.
Center of rotation
+Y
180°
+X
270
0
90
Fig15.11 (d) Angle 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 for
rotation of the tool and a command for movement along the X– and
Y–axes. A single–block stop always occurs after the tool is moved along
the X– and Y–axes.
Explanations
D Angle of the C axis
D Normal direction control
of the C axis

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