Thread Take-Up Spring; Arm Thread Guide R - Brother BAS-311H Instruction Manual

10-2. Thread take-up spring

Specifications
Thread take-up spring
height (mm)
Thread take-up spring
tension (N)
Lower
Higher
NOTE:
If the thread tension spring is not adjusted correctly, the upper thread trailing length will be uneven after thread trimming.

10-3. Arm thread guide R

More thread
Medium-weight materials
(-03[])
0.2 − 0.5
3121B
Stronger
Weaker
3122B
Less thread
Index mark
3123B
BAS-311H
Heavy-weight materials
(-05[])
7 − 10
0.6 − 1.2
<Thread take-up spring height>
Loosen the set screw (1) and turn the adjuster to adjust.
<Thread take-up spring tension>
Turn the tension stud (2) with a screwdriver to adjust the
tension.
The standard position of arm thread guide R (1) is when the
screw (2) is aligned with the index mark.
Loosen the screw (2) and move arm thread guide R (1) to
adjust.
* When sewing heavy material, move arm thread guide R
(1) to the left. (The thread take-up amount will become
greater.)
* When sewing light material, move arm thread guide R
(1) to the right. (The thread take-up amount will become
less.)
10. STANDARD ADJUSTMENTS
Seatbelt (-07[])
2 − 4
1.0 − 1.4
56