24
16) Tension Adjustment of Fixed Blade
First, loosen the fixed blade tension adjusting nut① with a
wrench box and then loosen the tension adjusting screw②.
As in Fig. 39, adjust the tension adjusting screw of the fixed
blade when the movable knife-edge meets the fixed knife-
edge. Adjust just enough so that the knife edges meet
without too much tension. After adjustment, make sure to
tighten the tension adjusting nut① using the wrench box in
the accessory box.
17) Replacement of Movable Knife
To change the movable knife①, turn the pulley manually to
place the needle at the highest point. Then, remove the
needle plate by unfastening the two movable knife fixing
screws② as seen in Fig. 40. Follow these instructions in
reverse order to assemble.
18) Replacement of Fixed Blade
A. To change the fixed knife①, loosen the inner spindle
stopper fixing screw② as in Fig. 41, remove the washer
③ and inner spindle stopper④, then unfasten the fixed
knife fixing screw⑤. Follow these instructions in
reverse order to assemble.
B. If the edge of the fixed blade is worn, make sure to grind
the knife edge with an oil grindstone as shown in Fig.
42.
19) Adjustment of Bobbin Catcher
(1) Adjusting the operation lever of the bobbin catcher
If the bobbin catcher operation lever③ is not working as
in Fig. 43, adjust the end of the bobbin catcher lever③
so that it is placed like ⓐ at the end of the connecting
link②. Then, loosen the operation lever fixing screw⑥
and adjust.
[Fig. 39]
[Fig. 40]
[Fig. 41]
[Fig. 42]
[Fig. 43]
Wrench Box
Movable Knife
Fixed Knife
Oil Grindstone
Fixed Blade
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