YASKAWA yasnac i80m

2.6
REFERENCE
POINT
RETURN
(Cont’d)
(3)
“Reference
point
return
operation”
means
the
same
operation
as a
series
of
operations
in
which
the
movement
is
begun
by
manual
reference
point
return
operation
and
terminated when
the
reference
point
is
restored.
(4)
Reference
point
return
is
accomplished
in
two
ways:
•
Low-speed
reference
point
return
(a
deceleration
LS
is
used)
•
Combination
of
low-speed
reference
point
return
the
first
time
after
power-on
and
high-speed
reference
point
return
the
second
and
subse¬
quent
times
(a
deceleration
LS
is
not
used
because the
reference
point
is
stored
in
the
memory).
(5)
High-speed
reference
point
return
(Refer
to
parameter
Pm4003
D6.
D7.)
High-speed
reference
point
return
may
be
used
in
place
of
the
automatic
reference
point
return
described
above.
In
this
case,
movement
is
as
shown
below.
<J>
After
being
positioned
at
intermediate
positioning
point
R,
the
machine is
positioned
directly
at
the
reference
point
by
rapid
feed.
<5>
In
this
case,
even
if
point
B
is
located
outside the
reference
point
returnable
area,
the
machine
can
be returned
to
the
reference
point.
(3)
However,
high-speed
reference
point
return
is
only
possible
for
the
axes
for
which
normal
reference
point
return
operation
has
been
completed
after
power-on
by
manual
reference
point
return
or
G28
command.
<3;
If
there is
at
least
one
axis
in
the
G28
command
for
which
normal
reference
point
return
operation
has
not
been
completed
after
power-on
by
manual
reference
point
return
or
G28
command,
normal
reference
point
return
operation
is
executed
for
all
axes
instructed
by
G28.
.
®
Automatic
high-speed
reference
point
return
is
only
valid
for
G28
command,
and
does
not
affect
the
operation
of
manual
reference
point
return.
-
68
-