Adjusting The Tension Release Of Thread Trimming (B856E) - Brother LZ2-B855E Service Manual

6. ADJUSTMENTS

6-16. Adjusting the tension release of thread trimming (B856E)

1027S
Caution knife
t
The tension release mechanism operates during thread trimming.
The thread tension will start to become less when the presser bar lifter is lowered and the plunger w of the thread
feeding solenoid q is at the length A shown in the illustration.
1. Remove the parts shown in the illustration while making this adjustment. Also lower the presser bar lifter.
2. Adjust so that the distance between the tension release connecting rod e and the crimped pin of the tension re-
lease plate r is at the distance B shown in the illustration.
Loosen the two set screws t and move the thread feeding lever u to adjust.
(First adjust so that the tension release connecting rod and the crimped pin are touching, and then adjust further
so that they are at the distance in the illustration.)
3. After adjusting, tighten the two set screws t while pushing the thread feeding lever u gently backward.
4. To check the timing for the start of tension release, push the plunger w of the thread feeding solenoid q by hand
until it reaches the position shown in the illustration.
6-13
1122S
B
y
0.2-1.0mm
e
r
LZ2-B855E,B856E
A
6-8mm
w
q
w
u
1030S
q
1031S