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

PROGRAMMING
15. COMPENSATION FUNCTION
B–62754EN/01
204
There are two types of offset. One is tool wear offset and the other is tool
geometry offset.
The tool path is offset by the X, Y, and Z wear offset values for the
programmed path. The offset distance corresponding to the number
specified by the T code is added to or subtracted from the and position of
each programmed block.
This block contains the offset
command with T code
Tool path after offset
Programmed path
Compensation by offset X, Z (offset vector)
Fig.15.1.5(a) Movement of offset (1)
In Fig.15.1.5(a), the vector with offset X, Y, and Z is called the offset
vector. Compensation is the same as the offset vector.
Offset is cancelled when T code offset number 0 or 00 is selected. At the
end of the cancelled block, the offset vector becomes 0.
N1 X50.0 Z100.0 T0202 ; Creates the offset vector corresponding
to offset number 02
N2 X200.0 ;
N3 X100.0 Z250.0 T0200 ; Specifying offset number 00 deletes the
offset vector.
N1
N2
Tool path after offset
Programmed path
Fig.15.1.5(b) Movement of offset (2)
When the power is first turned on , and the reset key on the MDI units is
pushed or the reset signal is input to the CNC from the machine tool, the
offset is cancelled.
Parameter LVK (No.5003#6) can be set so that offset will not be cancelled
by pressing the reset key or by reset input.
15.1.5
Offset
Explanations
D Tool wear offset
D Offset vector
D Offset cancel

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