JUKI TL Series - Position of Bobbin Case Positioning Finger; Momentum of Thread Take-up Spring; Tension of Thread Take-up Spring

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8. Position of bobbin case positioning nger
○ Loosen bobbin case positioning finger
❶
set-
screw.
○ Make right-hand edge of convex portion of bobbin
case positioning nger spring align with
❷
right-
hand edge of needle.
○ Temporarily tighten setscrew, hold clearance of
0.3 to 0.5 mm between inner hook and bobbin
case positioning nger, and securely tighten set-
screw.
Bobbin case positioning nger 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 gure below.
○ Perform adjustment with
❶
thread take-up spring
adjusting plate.
10. Tension of thread take-up spring
○ Pass needle thread up to
❶
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
❷
thread tensioner setscrew and turn
❸
thread tensioner.
○ Turning clockwise = increasing tension of
❹
thread take-up spring.
Needle
Thread take-up spring
adjusting plate.
10.5±0.5 mm
❷
Thread tensioner
setscrew
❶
Thread tensioner
thread guide
❸
Thread tensioner
asm.
❹
Thread take-up spring
Top view
Needle
0.3 to 0.5 mm
❷
❶
Front view
Needle thread
Bobbin case positioning
nger spring
Bobbin case positioning nger
Thread tensioner
thread guide
❶
Thread take-up spring
adjusting plate and setscrew