Upper Thread Tension - Baby Lock Mid-Line Machines Technical Training Manual

Adjustment
[Standard]
Start test mode, pass the schappe spun thread #60 through the thread guide, tension plate,
tension disk A/B and plate assembly, and pull it slowly by tension gauge. The tension
should be adjusted in 0.54 to 0.64 N (55 to 65 gf).
[Adjustment]
1. Remove the front thread guard cover. (Refer to "2-6".)
2. Start the test mode.
3. Raise the presser foot lever.
4. Pass the schappe spun thread #60 through the thread guide, tension plate, tension disk A/B and plate assembly in
this order.
5. Lower the presser foot lever.
6. Pull the thread slowly by the tension gauge, and check the thread tension.
7. Adjust the thread tension by turning the tension adjusting screw.
*Key point
• Loosen the tension adjusting screw (turn to the direction of "A").  The thread tension gets tighter.
• Tighten the tension adjusting screw (turn to the direction of "B").  The thread tension gets looser.
8. After adjustment, apply a small amount of the thread locker to tension adjusting screw.
XA9154001

Upper thread tension

Tension gauge 50 (0.5N)
Presser foot lever
Plate assembly
Schappe spun thread #60
0.54 - 0.64 N (55 - 65 gf)
4 - 9
36
Tension disk A/B
A
B
Thread guide
Tension adjusting screw
Tension plate