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

OPERATION
3.MANUAL OPERATION
B–62764EN/01
566
When the switch is ON during cutter compensation
Operation of the machine upon return to automatic operation after manual
intervention with the switch is ON during execution with an absolute
command program in the cutter compensation mode will be described.
The vector created from the remaining part of the current block and the
beginning of the next block is shifted in parallel. A new vector is created
based on the next block, the block following the next block and the
amount of manual movement. This also applies when manual operation
is performed during cornering.
Manual operation performed in other than cornering
Assume that the feed hold was applied at point P
H
while moving from P
A
to P
B
of programmed path P
A
, P
B
, and P
C
and that the tool was manually
moved to P
H’
. The block end point P
B
moves to the point P
B’
by the
amount of manual movement, and vectors V
B1
and V
B2
at P
B
also move
to V
B1’
and V
B2’
. Vectors V
C1
and V
C2
between the next two blocks P
B
– P
C
and P
C
– P
D
are discarded and new vectors V
C1’
and V
C2’
(V
C2’
=
V
C2
in this example) are produced from the relation between P
B’
– P
C
and
P
C
– P
D
. However, since V
B2’
is not a newly calculated vector, correct
offset is not performed at block P
B’
– P
C
. Offset is correctly performed
after P
C
.
V
C1
V
C2
P
A
P
D
P
C
P
H’
P
B
V
B2
V
B1
V
B2’
V
C1’
P
H
V
B1’
Cutter path after
manual operation
Programmed path
(absolute command)
Manual operation
P’
B
Cutter path before
manual operation

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