Upper Thread Tension - Horizon Fitness Memory Craft 9480 QC PROFESSIONAL Service Manual And Parts List

Upper thread tension

The standard upper thread tension should be 59 to 67 grams when the machine is set for pattern No.1 (U1)
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.
Reverse stitch button
Start/stop button
Pulling direction: (pulling speed 110 mm/sec.)
Mechanical Adjustment
1. Turn the power switch ON while pressing the start/
2. Thread #50 polyester thread to the machine.
3. Set the thread tension "3.4" by pressing "3.4" key.
Adjusting
screw
4. Open the face cover.
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stop button and the reverse stitch button.
The LCD shows the factory setting mode.
Press the "BH Sensor" key.
(A) If the thread tension is less than 59 gf, turn the
adjusting screw in the direction of "+".
(B) If the thread tension is more than 67 gf, turn the
adjusting screw in the direction of "–".