FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
B–62754EN/01
15. COMPENSATION FUNCTION
237
If the following command is specified in the offset mode, the offset mode
is temporarily canceled then automatically restored. The offset mode can
be canceled and started as described in Subsections II–15.3.2 and
II–15.3.4.
If G28 is specified in the offset mode, the offset mode is canceled at an
intermediate position. If the vector still remains after the tool is returned
to the reference position, the components of the vector are reset to zero
with respect to each axis along which reference position return has been
made.
(G42 G00)
S
S
S
S
G28
G00
r
r
Intermediate position
Reference position
The offset vector can be set to form a right angle to the moving direction
in the previous block, irrespective of machining inner or outer side, by
commanding the tool nose radius compensation G code (G41, G42) in the
offset mode, independently. If this code is specified in a circular
command, correct circular motion will not be obtained.
When the direction of offset is expected to be changed by the command
of tool nose radius compensation G code (G41, G42), refer to ”Change
in the offset direction in the offset mode” in Subsec.15.3.3.
LinearLinear
r
A block specified by G42
G42 mode
r
C
Intersection
S
L
L
S
L
CircularLinear
A block specified by G42
Intersection
Programmed path
G42 mode
Tool nose radius center path
D Temporary tool nose
radius compensation
cancel
S Specifying G28
(automatic return to the
reference position) in
the offset mode
S Tool nose radius
compensation G code in
the offset mode

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