Tension Of Thread Take-Up Spring - JUKI TL-2010Q Service Manual

8. Position of bobbin case positioning finger
™ Loosen bobbin case positioning finger 1 set-
screw.
™ Make right-hand edge of convex portion of bobbin
case positioning finger spring align with 2 right-
hand edge of needle.
™ Temporarily tighten setscrew, hold clearance of
0.3 to 0.5 mm between inner hook and bobbin
case positioning finger, and securely tighten set-
screw.
Bobbin case positioning finger should not come
in contact with hook.
Bobbin case positioning finger should not inter-
fere with hook.
9. Momentum of thread take-up spring (absorbing amount of thread)
™ Thread take-up spring has to be installed at posi-
tion of 10±0.5 mm from thread guide as shown in
the figure below.
™ Perform adjustment with 1 thread take-up spring
adjusting plate.
10.5±0.5 mm
Thread tensioner
thread guide

10. Tension of thread take-up spring

™ Pass needle thread up to 1 thread tensioner thread guide.
™ Lower presser foot and draw needle thread.
™ Adjust tension of thread take-up spring to 0.176 to 0.245N when thread take-up spring starts lowering.
™ For adjustment, loosen thread tensioner setscrew and turn 3 thread tensioner.
™ Turning clockwise = increasing tension of 4 thread take-up spring.
2 Thread tensioner
setscrew
Thread take-up spring
adjusting plate.
4 Thread take-up spring
Needle thread
3 Thread tensioner
asm.
19
– –
Needle
Top view
Bobbin case positioning finger
Front view
Needle
1 Thread take-up spring
adjusting plate and setscrew
1 Thread tensioner
thread guide
0.3 to 0.5 mm
3
1
2
Bobbin case positioning
finger spring