3.
SPECIFKAlWNS
/MELSEC-A
Fig.
3.20
Linur
Interpolation
Note: For interpolation positioning, the actual positioning speed is
approximately
5%
lowr than the
set
speed.
(If
the set speed
is extremely
low,
the error will
be
larger, e.g. about
10%
at
1
WPB.
I
POINT
1
During linear interpolation positioning
it
is
possible for
the
speed
of
a
given axis to
exceed
the set
speed
and
the
speed
limit value
if
the
travel
distance for
the
two
axes varies
greatly.
For linear interpolation,
it
is
suggested that
the
positioning
speeds
and
speed
limits for
the
X
and
Y
axes are
set
to
the
same value.
(3)
Positioning address
The positioning address
is
set
either
as
an absolute value or an
incremental value.
(4)
Dwell
time
The dwell time is the period of time indicated
in
Fig.
3.21 below.
Positioning commenced
(X81
I
Speed
graph
For
pattern
00
I
-
Dwell
Fig.
3.21
Pattern
00
During interpolation positioning, the longer dwell time value
is
valid irrespective of the distance travelled
(e.g.
if
X
axis
=
1
sec
and
Y
axis
=
1.5
sec,
1.5
sec
is
valid.)
3-28
IS
iNAl
66101.4
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