Brother BAS-311G service manual Thread take-up spring, Arm thread guide R, Adjustment

7. ADJUSTMENT

7-2-2. Thread take-up spring

Lower Higher

<Thread take-up spring height>

Loosen the set screw (1) and turn the adjuster to adjust.

5022Q

<Thread take-up spring tension>

Stronger

Weaker

4664Q 5023Q

Turn the tension stud (2) with a screwdriver to adjust the tension.

NOTE:

If the thread tension spring is not adjusted correctly, the upper thread trailing length will be uneven after thread trimming.

7-2-3. Arm thread guide R

More thread Less thread

Index mark

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.)

5030Q

90 BAS-311G, BAS-326G