21
Thread tension
gear
Tension discs supporter
Thread tension release
adjusting plate
Tension discs (closed)
Convex part of
thread tension
gear
Thread tension
release claw
Thread tension
release claw
Setscrew
Thread tension gear
0.2 to 0.8 mm
View A
0.2 to 0.8 mm
Thread tension release
adjusting plate
Tension discs
supporter
View A
Tension
release
claw
Tension discs supporter
Thread tension release
adjusting plate
Tension discs (opened)
Thread tension release
adjusting plate
Tension release mechanism adjustment
When the presser foot lifter is raised, the tension release mechanism should work correctly.
1 Remove the face plate, top cover and front cover
(Refer to pages 1 and 4).
2. Turn the power switch off. Turn the thread tension
gear until the convex part of tension gear is NOT set
at the tension release claw.
3. Loosen the setscrew.
4. Adjust the clearance between the tension release
adjusting plate and the tension disc supporter to
0.2 mm to 0.8 mm.
5. Turn the thread tension gear until the convex part of
tension gear is set at the tension release claw. Be
sure that the tension release adjusting plate touches
the tension discs supporter and the tension discs
opened slightly.
Convex is NOT set at tension release claw
Convex is set at tension release claw
Convex part of
thread tension
gear
Thread tension gear
Setscrew