3)
Adjusting
the
height
ofthe
lifter
(AK-30,
-31)
7
0
Loosen
locknut
O ofthe
connecting
fitting.
0
Loosen
the
locknut
of
presser
lifter
stopper
(A)©
, and
fully
lower
thestopper
(A).
(D
In the
state
described
in
0,
actuate
the
solenoid,and confirm that the lifting amoimt
of the
presser
foot isapproximately10 mm.
If
the presserfoot is
raised
beyond 10 mm,
adjustthe heightof the
presser
foot by tuming
plunger
0 counterclockwise. If the
presser
footisnot
raised
as
high
as10mm,adjustthe
heightof the
presser
foot to 10 mm by tuming
the plunger clockwise.
0
Actuate
the
solenoid
to
raise
stopper
(A)
0
until
it
comes
in
contact
with
the
oil reservoir.
0 Turn OFF the knee switch. Then further move
up stopper (A) 0 by one turn.
0 Tightenthe locknut of stopper(A) 0 and the
locknut of the connectingfitting.
0
Raise
presser
lifter
stopper
(B)
0
imtil
it
comes
in contact with the oil reservoir,and adjust the
clearancebetween knee lifter pushingrod 0
and the indented sectionof
presser
barlifting
lever O .
0 Tighten the locknut of stopper(B) 0 .
Fig.
3-12
(Caution) The lifting
amount
of
the
presser
foot
can be changed
only
by raising or lowering presser lifter stopper
(A) 0 . However,
the
presserfoot may fail to go up if
the
lifting amount isset to an excessivevalue.
If you wish to change the lifting amount of
the
presserfoot, be sure
to
follow
the
seriesof procedure from
step 0 through
0.
3-7. How to reduce the hand light from flickering
(for
single phase only)
Fig. 3-13
-
28
-
When you rapidly accelerate the sewing machine, the
hand light or the room lighting may flicker. This is
caused by a line voltage drop due to the abrupt start
and acceleration
of
the motor. Such flickeringwill do
no harm to the performance
of
the
sewing
machine.
To
reduce
the lightflick,turn
screw
O on the back
of
the PSC box in the direction
of
the
anow,
using a
screwdriver.
(If
you do this, the risingspeed
of
the sewingmachine
will decrease.)
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