SunStar KM-2300 - 8-11. Adjusting bobbin stopper; 8-12. Adjusting oil flow in hook (KM-2300 M & S type)

33
8-11. Adjusting bobbin stopper
1. If bobbin stopper① is inserted too deeply into bobbin case,
lower remaining thread will be so short that bobbin cannot
rotate. As a result, sewing may not be created in the next
sewing.
2. On the contrary, if bobbin stopper① is not inserted enough,
upper thread will missed from bobbin stopper during
trimming and the length of remaining thread in needle will
be short. As a result, sewing may not be created in the next
sewing.
[ Figure 55 ]
3. If the trimming was done manually, stop the machine when
the edge of the fixed knife meets the bobbin stopper
adjustment baseline that is marked on the top. Loosen the
bobbin catcher fixing screw③ and adjust the bobbin stopper
so that the contact surface of the bobbin stopper① lightly
touches the center of the projecting part of the bobbin②.
Once the operation is completed, check to see whether the
bobbin stopper springs back lightly.
[ Figure 56 ]
8-12. Adjusting oil flow in hook
(KM-2300M󳣑 & S󳣑type)
1. Bend the machine body backward.
2. If oil amount adjusting screw① is turned clockwise (in
direction of+), the amount of oil supplied to hook will
increase.
3. If oil amount adjusting screw① is turned counterclockwise
(in direction of- ), the amount of oil supplied to hook will
decrease.
[ Figure 57 ]
①
②
①
Bobbin Stopper
Adjustment Baseline
Fixed Knife
Movable Knife
③
①