
PROGRAMMING14. COMPENSATION FUNCTION
B–63534EN/02
384
The rotary table dynamic fixture offset function saves the operator the
trouble of re–setting the workpiece coordinate system when the rotary
table rotates before cutting is started. With this function the operator
simply sets the position of a workpiece placed at a certain position on the
rotary table as a reference fixture offset. If the rotary table rotates, the
system automatically obtains a current fixture offset from the angular
displacement of the rotary table and creates a suitable workpiece
coordinate system. After the reference fixture offset is set, the workpiece
coordinate system is prepared dynamically, wherever the rotary table is
located.
The zero point of the workpiece coordinate system is obtained by adding
the fixture offset to the offset from the workpiece reference point.
X
Y
X
Y
X
Y
F
0
F
θ
0
θ
Z
W
Machine coordinate
system origin
W : Workpiece origin offset value
θ
0
: Reference angle
F
0
: Reference fixture offset value
θ : Rotation axis angle
F : Fixture offset value
C
Rotation axis
center
Fig.14.14 (a) Fixture offset
G54.2 Pn ;
n : Reference fixture offset value number (1 to 8)
G54.2 P0 ;
14.14
ROTARY TABLE
DYNAMIC FIXTURE
OFFSET
Format
D Fixture offset command
D Fixture offset cancel
command