Upper Thread Tension - Brother XM3700 Service Manual

Adjustment
[Standard]
At upper tension-control dial [4], when the schappe spun thread #60 is passed through the
tension disc and the presser foot lifter is lowered and the thread is pulled down slowly
with the tension gauge, the thread tension should be 0.37 to 0.42 N (38 to 43 gf).
[Adjustment]
1. Remove the face plate, the pattern selection dial and the front cover.
2. Turn the upper tension-control dial until the [4] is the topmost position.
3. Pass the schappe spun thread #60 through the tension disc, and lower the presser foot
lifter. (Close the tension disc.)
4. Pull the thread down slowly with the tension gauge, and measure the thread tension.
5. Adjust the thread tension by turning the adjusting screw of the thread tension unit.
*Key point
• Turn the adjusting screw to the direction of "a" → The thread tension is smaller.
• Turn the adjusting screw to the direction of "b" → The thread tension is larger.
XA9154001
Schappe spun thread #60
0.37- 0.42 N (38 - 43 gf)

Upper thread tension

Tension gauge 50 (~ 0.5 N)
Adjusting screw
Tension disk
4 - 28
Upper tension-control dial
Presser foot lifter