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7-16. Adjustment of the fixed knife position
(1) Open the cylinder cover (No.1) and remove the ring-E type (No.4), which engages the movable knife
(No.2) and the thread trimmer link (No.3).
(2) Loosen the screw (No.5) then, remove the slide plate (No.6).
(3) Adjust the fixed knife (No.7) position to be positioned for the blade edge to have the clearance 0.5mm
from the edge of the needle plate (No.8), which is standard position.
(4) For the adjustment of the fixed knife (No.7) position, loosen the screw (No.9) and move the knife.
7-17. Adjustment of the thread take up spring
(1) Loosen the set screw (No.2) and turn the whole thread tension regulator (No.3) then, adjust the thread
take up spring (No.1) stroke to be in 9 to 10mm, which is standard stroke.
(2) Insert the screw driver into the slit of the thread tension regulator and adjust the thread take up spring
tension. When tightening the screw driver clockwise, the thread take up spring tension becomes tight,
and when loosening the screw driver counterclockwise, the thread take up spring tension becomes
loose. For the adjustment of the thread take up spring tension, tighten the set screw (No.2) so that the
whole thread tension regulator does not turn.
<5>
0.5mm
<6>
<8>
<7>
<9>
<1>
<4>
<2>
<3>
<1>: Thread take up spring
<2>: Set screw
<3>: Thread tension regulator
<1>
<2>
<3>
9~10mm
<1>: Cylinder cover
<2>: Movable knife
<3>: Thread trimmer link
<4>: Ring-E type
<5>: Screw
<6>: Slide plate
<7>: Fixed knife
<8>: Needle plate
<9>: Screw
