SunStar KM-250 Series, Руководство пользователя

Страница: 16 / 31

16
3
Control and Adjustment of the Sewing Machine
Caution
▶ Always turn off the power when mounting a needle. If the operator mistakenly steps on the pedal
while the power is on, the machine will start automatically and can result in physical injuries.
▶ When using clutch motor, be aware that the motor will continue to rotate for a while even after the
power is switched off due to inertia. Start to work on the sewing machine only after the motor has
come to a complete stop.
1) Needle Insertion
With the needle groove
①
facing left, insert the needle tip
into the upper end of the stopper hole
②
and fasten the
needle with the clamp screw
③
. (See Fig. 19)
2) Needle Bar Adjustment
As is shown in Fig. 20, unscrew the rubber plugs ④ in the
needle bar adjustment hole that is on the face plate and turn
the pulley so that the needle bar is in a down-stop position.
Then turn loose the clamp screws
⑤
on the needle bar
handle, move the needle bar such that the lowest carved sign
on the needle bar
⑦
is in line with the bottom of the needle
bar lower bushing ⑥ , and tighten the clamp screws of the
needle bar handle. Lastly, plug in the rubber plugs
④
.
3) Timing Adjustment of Needle and Hook
As can be seen in Fig. 20, align the bottom of the needle bar
bushing ⑥ with the hook fixed position sign ① marked on
the needle bar and loosen the three hook fixing screws
②
.
Turn the hook so that the edge of the hook
③
is in line with
the needle center. Adjust such that the distance between the
inside of the groove on the needle side and the edge of the
hook ③ is 0.05-0.1mm, then tighten the three fixing screws
②
again.
[Fig. 19]
[Fig. 20]
4) Lubrication Adjustment of Thread Take-Up Lever
As in Fig. 21, oil flow is at its maximum when the mark ②
on the head of the oil flow control pin ① and the center of
the hole
③
on the thread take-up lever crank shaft is directly
aligned. In contrast, oil flow decreases when the mark is
turned closer to the corner
⑤
of the link cam washer
④
.
Furthermore, if the mark passes the corner of the link cam
washer, oil will not flow at all.
[Fig. 21]
0.5mm
0.05~0.1mm
Hook
Keystone Sewing Machine Company, Inc.