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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.
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68
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