Position Of The Tension Release Stopper; Releasing Amount Of The Thread Tension Disk - JUKI MOL-254 Engineer's Manual

2) Position of the tension release stopper

Adjust the clearance provided between end face
to 1.0 mm in the state that the thread trimming operation is not performed.
Thread trimmer
conneting rod

3) Releasing amount of the thread tension disk

Make thread trimming operation (tension release operation) after turning ON the power, or pressing
the cam follower in the direction of ⇦ when turning OFF the power, rotate the main shaft in the normal
direction to make thread trimming operation, and ride the tension release arm pin on the tension
release notch.
At this time, adjust the releasing amount A of the thread tension disk to 0.6 to 0.8 for the (H) type,
sewing machine for the heavy-weight materials.
(Caution) Releasing amount of the thread tension disk will slightly vary according to the thread
count used.
Releasing amount A
Cam follower
Tension release
notch
Standard Adjustment
of the cam follower and tension relesase arm pin
Cam follower
Thread trimmer shaft
Thread release arm
Return spring
Tension release
pin
(Thread tension disk)
29
− −
Widen
Narrow
(Tension release link)