7. ADJUSTMENT
87
BAS-342G
7-2-2. Thread take-up spring
<Thread take-up spring height>
Loosen the set screw (1) and turn the adjuster to adjust.
<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).
NOTE:
If the thread tension spring (3) is not adjusted correctly, the upper thread trailing length will be uneven after thread
trimming.
7-2-3. Arm thread guide R
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.)
4030M
4029M
Higher
More thread
Less thread
Index mark
Stronger
Weaker
Lower
4031M
More thread
Less thread
Index mark
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