User manual

28.
AUTO-LTFTER
(AK-3O
OR
AK-311
(AVATLABLE
ON
SPECTAL ORDERI
*
The AK-30 or AK-31
is designed
to
automatically
raise the
presser
foot for
60
seconds
after
completion
of thread trimming.
The AK-30 or AK-31 uses an exclusive
motor.
1.
How
to use the AK-30
1) When it is necessary
to raise
sewing, stop sewing
and depress
2)
The
moment
you
release the
foot comes down.
2.
How
to use the AK-31
1) Refer to "10. PEDAL
OPERATION"
3.
Adjusting the Auto-lifter stroke
1) Ioosen
locknut
O
.
2)
Loosen locknut
@
of
stopper
(A)
O
,
and fully
lower
the stopper
(A).
3) Actuate the solenoid
under the condition described
in
step 2) above, and check
if
the
presser
foot
is lifted
about
l0
mm.
If
the
presser
foot lift exceeds
l0 mm,
turn
plunger
@
counterclockwise
to
adiust the
lift to 10 mm.
If
the
presser
foot lift is
less-than l0 mm, turntheplunger
clockwise to adjust the
lift
to
10 mm.
4)
Actuate
the solenoid to cause
stopper
(A)
O
to come
into contact with the oil
reservoir.
5) Tum the knee switch
OFF, then raise
stopper
(A)
O
an additional turn.
6) Tightenlocknutofstopper(A)
O
andlocknut
Q
7) Raise stopper
(B)
O
until
it comes into contact
with
the oil
reservoir, then
provide
a clearance
of about I
mm
between
the indented
part
of
lifter lever
()
and
knee
lifter
pushing
rod
O
coming from the oil
reservoir.
8) Tightenlocknut
@
ofstopper(B)
@
the
presser foot while
knee switch
O
knee
switch. thepresser
o
o!-.o
(@)
d\:-/@
:
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.
Operation
Precautions
1)
When using the Auto-lifter, AK-30 or AK-31,
that
No. t-(ff.ON)
of
DIP iwitch
O
mounted
PSC
circuit
board
has been
set to
ON.
2)
If
you
want
to
hold the
presser
foot in its upper
position
after thread
trimming for an
unlimited time rather
than
just
60
seconds,
set
both
No.
1
(FLON)
and
No.
2
(FLPW)
to ON.
By so doing,
you
can
keep the
presser
foot in
its upper
position
for an unlimited time
after thread
trimming.
Flowever, if
you
leave
your
machine for an
extended
time, remember to turn the
power
switch
OFF.
be
sure
on
the
3)
-10-