
FANUC Series 16i/18i-TB Compound Machining Function A-78656E/01
Nov.14.2001 Edition 1
52/127
3.2
The compensation according to the angle of B-axis
If B axis is rotated when the measurement reference position of the
offset is different from B axis rotation center position, the
measurement reference position slides according to the angle of B
axis.
At that time, CNC compensates the tool offset (T mode) and three-
dimensional coordinates conversion center coordinates (M mode).
3.2.1
Idea of basic coordinate system
As shown in a up figure, the installation center of the tool at the position of
B=0° is made a imaginary zero point.
Px : Distance along X-axis from imaginary zero point to B axis rotate
center position
Pz : Distance along Z-axis from imaginary zero point to B axis rotate
center position
OFSx : Offset value along X-axis
OFSz : Offset value along Z-axis
EXOFSx : External workpiece zero point offset value along x axis
EXOFSz : External workpiece zero point offset value along Z- axis
OFSx
OFSz
Px
Pz
EXOFSx
EXOFSz
or
Imaginary
zero point.
B axis rotate center
osition
EXOFSz
or
G55