YASKAWA yasnac i80m

2.13
PROGRAM
SUPPORT
FUNCTIONS
(Cont’d)
(5)
Method
of
commanding
boring
(G76)
and
back
boring
(G77)
(a)
The
direction
of
shift
for
G76
and
G77
can
not
only
be
commanded
by
[Q
command
+
angle
(setting
PmS05)J.
but
can
also
be
commanded
by
the
program.
(b)
The
dwell
time
before
shift
can
also
be
commanded
by
setting
Pm400
or
by
program.
G76
X
......
Y
......
Z
......
R
I
J
P
‘-Dwell
time
Specification
of
shift
direction
L
•
Boring
(G76)
command
i;
7*.
I<_
i._
i-_
P_
w_
:
(CANNED
SHIFT)
i..
7i.
X_
V.
/.
H_
I
.
I..
I
_
l‘.
V\_
:
(VARIABLE
SHIFT)
RETURN
TO
INI
I
JAL.
W.
AND
R
POINT
SPINDLE
START
AFTER
SHIFT
(\.
V)
<
INITIAL
POINT
T
:
c
W'-POINT
R
POINT
T
c
f
SHIFT
SPINDLE
DIVIDING
STOP
AFTER
DWELL
-
:
Z-POINT
OK
il.
Ji
SHIFT
•
DWELL
o
SINGLE-BLOCK
STOP
O
If
address
Q
and
address
I
or
J
are
simultaneously
commanded,
address
1
or
J
is
disregarded.
0
For
the
hole
bottom
dwell,
setting
Pm
400
is
overridden
by
program
command.
O
Setting
Pm
400
is
only
valid
when
bit
D3
of
Pm
4017
is
ON.
O
The
shift
speed
is
set
by
Pm
2864.
However,
if
Pm
2864
=
0.
F
command
is
fol¬
lowed.
0
Because
address
Q
is
modal,
if
there
is
Q
command
befoi-e
1
or
J
command,
1
or
J
is
disregarded.
I
or
J
can
be
made
valid
by commanding
it
after
canceling
the
_
canned
cycle
with
G80.
_
Fig.2.13.9
Boring
(G76)
Command
-
186
-