1.
GENERAL
1-1.
Features
1)
Use
ofan
AC
servomotor
provides
the
following
mqor
advantages:
(1) No noise or vibration while the machine is at rest.
(2)
The
power
consumption
is
40%
to
60%
compared
with
the
conventional
power
consumption.
(3)
The
motor
weight
has
been
almost
halved,
permitting
easier
layout
change.
(4)
The
absence
ofa
clutch
(no
brake
in
case
ofN
company's
motor)
makes
theunit
virtually
maintenance-fiee.
(H
company's
brake
is
good
for
more
than 10
years
under
normal
operation.)
Unlike the DC servomotor, there is no bmsh.
2) Pedal operation features
(1) Youcanset the
maximum
sewing
speed
in400
s.p.m.
stepswith fingertipcontrol according to the type of
operation and your level
of
proficiency.
(In the conventional unit, the motor pulleyhad to
be changedto alter the maximum
sewing
speed.)
Further, you can get the samespeedat any time.
(2) The
conventional
speed
limit
knobis
also
provided.
So, by combining the knob with the function
mentioned in(1)
above,
high-speed
play strokecan
be provided. This eliminatesthe need for large
pedalingforce to maintain high speed,significantly
reducing operator foot fatigue.
(3) The
speed
acceleration
starting
pointcanbe
adjusted
about 1 mm (0.039") by pedal stroke to suit with
each operator.
(4) The minimum speedfor depressing the front part of
the pedal can be changed(from 200 s.p.m. to 400
s.p.m.).
High-speed'
play
stroke
Pedal
depression
amount
(3)
1mm
(0.039
'l
adjustable
by
^
pedal
stroke
>
/
/ (4) 400 spm
_t
200
spm
Pedal
depression
amount
3)
Reverse
feedstitchingfeatures
(1)
As
in
the
conventional
model,
you
can
select
either
the
mode
in
which
priority
is
given
to
pedaling
for
the
starting
reverse
feed
stitching
or the
mode
in
which
the
machine
performs
nonstop
reverse
feed
stitching
at
a preset speed.
(2)
The
reverse
feed
stitching
speed
has
been
increased
from
1,700
s.p.m.
to
1,900
s.p.m.
(about
12%
increase).
Furthermore, the
speed
canbe
adjusted
from
1,000
s.p.m.
to 3,500
s.p.m.,
using
the
variable
resistor.
(3)
The
speed
control
circuitry
has
been
improved
to
prevent
overrun
or
1-stitch
error
when
the
reverse
feed
stitching speed is changed.
4) The softstart speedhasbeen
increased.
The
soft
start
speed
for
assuring
properly
interlaced
threads
ofa
starting
stitch
has
been
increased
from
200
s.p.m.
to 800 s.p.m.
The
soft
start
speed
is
now
adjustable
within
a
range
of
200
s.p.m.
to
2,000
s.p.m.,
so
you
do
not
have
to
drop
the speed more than necessary.
- 1 -
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