21
Pulling direction: (pulling speed 110 mm/sec.)
Mechanical adjustment
Upper thread tension
The standard upper thread tension should be 59 to 67 grams when the machine is set for pattern No.1 and the thread
tension is set at "3.4", measured with a #50 polyester thread being pulled at approximately 110 mm/sec. in the
direction of arrow.
1. Turn the power switch ON while pressing the Start/
Stop button and the Reverse stitch button. The LCD
shows the Factory Setting Mode. Press "BH Sensor"
key.
2. Thread #50 polyester thread to the machine.
3. Set the thread tension "3.4" by pressing "3.4" key.
4. Open the face plate.
(A) If the thread tension is less than 59 gr, turn the
screw in the direction of "+".
(B) If the thread tension is more than 67 gr, turn the
screw in the direction of "–".
Screw
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