Tension Release Mechanism - ELNA eXcellence 780 Service Manual

Tension release mechanism

When the presser foot lifter is raised, the tension release mechanism should work correctly.
Convex is NOT set at tension release claw
Setscrew Tension
release claw
Thread tension
release
adjusting plate
1.2 – 1.8 mm
Thread tension
release adjusting plate
Tension discs (closed)
Mechanical adjustment
Thread tension
gear
Convex part of
tension gear
Thread tension release
adjusting plate
Tension
Setscrew
release claw
Tension discs
supporter
View A
View A
1.2 – 1.8 mm
Tension discs supporter
1. Remove the belt cover and top cover (see pages 1-2).
2. Remove the front cover (see page 6-7).
3. 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.
4. Loosen the setscrew.
5. Adjust the clearance between the tension release
adjusting plate and the tension disc supporter to 1.2
mm – 1.8 mm.
6. 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 set at tension release claw
Thread
Thread tension gear
tension
gear
Tension
release claw
Thread tension release
adjusting plate
Tension discs (opened)
25
Convex part of
tension gear
Tension discs supporter