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

OPERATION
B–62754EN/01
3. MANUAL OPERATION
481
When the switch is ON during tool nose radius 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 tool nose radius 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’
Tool nose radius
path after
manual operation
Programmed path
(absolute com-
mand)
Tool nose radius
path before
manual operation
Manual operation
P’
B

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