JUKI LK-1910 Engineer's Manual page 25

Adjustment Procedures
1) Loosen setscrew 6 in the cam installing link. (The thread
trimmer shaft is possible to rotate.)
Loosen two setscrews 5 in the tension release arm thrust
collar.
2) Align the rear end of thread trimmer shaft 4 with the processed
section A of the sewing machine arm, and tighten two
setscrews 5 in the tension release arm thrust collar.
3) Push the cam installing link in the direction of arrow (a). Then
removing the play, tighten setscrew 6 in the cam installing
link.
1) In the state that the thread trimmer is separated, loosen two
setscrews 1 in the cam installing link stopper, and adjust the
respective clearances to 0.3 mm each. Then tighten the
setscrews 1.
Results of Improper Adjustment
™ If thread trimmer shaft 4 is
mitakenly adjusted, the receiving
amount of thread trimmer shaft 4
becomes improper, causing
thread trimmer failure or sewing
machine lock due to twisting.
™ If a play occurs, it will lead to the
defective disk floating.
™ Sewing machine lock or thread
trimmer failure will occur.
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