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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 to enter 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 g, turn the screw in
the direction of "+".
(B) If the thread tension is more than 67 g, turn the screw in
the direction of "–".
Start/Stop button
Reverse
stitch button
⇒
Screw
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