Thread Take-Up Spring; Arm Thread Guide R - Brother bas-311hn Instruction Manual

7-3. Thread take-up spring

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

7-4. Arm thread guide R

More thread
Medium-weight materials
(-03[])
0.2 − 0.5
Lower
Higher
High
Low
Less thread
Index mark
BAS-311HN, BAS-326H
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.
3548B
<Thread take-up spring tension>
1. Press the upper thread slightly above the tension
bracket (2) with a finger to stop the thread spooling out.
2. Pull the upper thread downward so that the thread
take-up spring (3) is extended to the same height as the
base of the thread guide arm (4), and then measure the
tension of the thread take-up spring (3).
3. Use a screwdriver to turn the tension stud (5) in order to
adjust the tension of the thread take-up spring (3).
3641B
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-weight material, move arm thread
guide R (1) to the left. (The thread take-up amount will
become greater.)
* When sewing light-weight material, move arm thread
guide R (1) to the right. (The thread take-up amount will
become smaller.)
3123B
7. STANDARD ADJUSTMENTS
Seatbelt (-07A)
2 − 4
1.0 − 1.4
39