
OPERATION
B–64154EN/01
3. MANUAL OPERATION
377
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
Manual operation during cornering
This is an example when manual operation is performed during cornering.
V
A2’
, V
B1’
, and V
B2’
are vectors moved in parallel with V
A2
, V
B1
and V
B2
by the amount of manual movement. The new vectors are calculated
from V
C1
and V
C2
. Then correct cutter compensation is performed for the
blocks following Pc.
V
B2
V
B1
V
C1
V
C2
P
A
’
P
C
P
B
V
C1
’
V
A1
V
A2
V
A2’
V
A1’
P
H
’
P
H
P
A
V
B1’
V
B2’
Cutter path after
manual operation
Programmed path
(absolute command)
Cutter path before
manual operation
Manual operation