21
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Mechanical adjustment
Upper thread tension
The standard upper thread tension should be 59 to 67 grams when pulling the thread (white polyester thread size 50)
at the speed of 110 mm/sec with the tension at "3.4" (Be sure the presser foot is lowered).
Pulling direction: (pulling speed 110 mm/sec.)
Reverse
stitch button
Start/stop
button
1. Lower the presser foot.
2. Turn the power switch ON while pressing the start/stop
button and reverse stitch button.
Press "BH sensor" key.
3. Press "Free" key.
The tension disc will be opened with the presser foot
lowered.
4. Thread white polyester thread (size 50) to the machine.
5. Press "3.4" key.
The tension discs will be closed and the thread tension
will be set at "3.4".
6. Open the face cover.
Adjust the tension by turning the thread tension
adjusting screw.
To loowen the tension, turn it clockwise (in the direction
of "–").
To tighten the tension, turn it counter clockwise (in the
direction of "+").
Thread tension dial
adjusting screw
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