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

PROGRAMMING
B–62764EN/01
15. COMPENSATION FUNCTION
353
A programmed shape can be rotated. By using this function it becomes
possible, for example, to modify a program using a rotation command
when a workpiece has been placed with some angle rotated from the
programmed position on the machine.Further, when there is a pattern
comprising some identical shapes in the positions rotated from a shape,
the time required for programming and the length of the program can be
reduced by preparing a subprogram of the shape and calling it after
rotation.
Angle of rotation
Center of rotation
Y
X
0
Fiig15.10 (a) Coordinate system rotation
G68 α_β_R_ ; Start rotation of a coordinate system.
G17 (G18 or G19) : Select the plane in which contains the figure to be
rotated.
α_β_ Absolute command for two of the x_,y_,and Z_ axes
that correspond to the current plane selected by a
command (G17, G18, or G19). The command
specifies the coordinates of the center of rotation for
the values
specified subsequent to G68.
R_ Angular displacement with a positive value indicates
counter clockwise rotation. Bit 0 of parameter 5400
selects whether the specified angular displacement is
alwarys considered an absolute value or is considered
an absolute or incremental value depending on the
specified G code (G90 or G91).
Least input increment: 0.001 deg
Valid data range : –360,000 A360,000
Coordinate system rotation mode
(The coordinate system is rotated.)
G69 ; Coordinate system rotation cancel command
Format
Meaning of command
G17
G18
G19
15.10
COORDINATE
SYSTEM ROTATION
(G68, G69)
Format

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