Singer One Plus - Adjustment of Thread Tension

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Original issue
Oct.2012
Service Manual
One Plus
Model
13. Adjustment of thread tension
Checking:
1. Set thread tension at the center of “AUTO” position.
2. Pull thread between tension discs and check thread tension value with two twisted
Polyester #50 thread.
3. Measured value should be 40 to 50 g.
* Bobbin thread tension should be 16 to 18 gr.
* For actual sewing, sew zigzag stitch and check balance of upper and lower threads.
Adjustment:
1. Remove front cover.
2. Memorize current position of tension dial and pull out it.
3. Set the tension as you like by rotating long screw A, which looks like a gear wheel,
clockwise and anticlockwise.
Rotate it clockwise to make the tension stronger and anticlockwise to make the
tension weaker.
A