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17) Replacing movable knife and fixed
blade
(1) Open the hook cover
(2) Loosen the screw ①, and remove the fixed blade holder
cover②.
(3) Loosen the screw ③, and disassemble the washer④ and
the fixed blade⑤.
(4) Loosen the bolt ⑥, and disassemble the movable knife⑦.
※Assembling method is the reverse of
disassembling method.
18) Adjustment of wiper
(1) Stop the needle in up-stop position. (up-stop needle position of the control after trimming)
(2) Set the stitch length dial at "2".
(3) When pressing with hand as in the above picture, the wiper① edge should protrude about 0.3 mm from the needle edge.
Loosen the four clamp screws ② to vertically adjust the solenoid③.
(4) Route the thread onto the two needles.
(5) The position of the wiper edge① should look like the picture ⑤, where the two hooks of the wiper① can securely route
the thread. To do so, loosen the clamp screws④ of the wiper and horizontally adjust the wiper①.
③
About 0.3 mm
②
⑥
⑦
①
②
④
About 0.3mm
⑤
⑤
④
③
[Figure 51]
About 0.3mm
[Figure 52]
33
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