Bobbin Winder - Brother PE770 Service Manual

Adjustment
[Adjustment standard]
The bobbin should be wound evenly, and up to 80 - 90% of the outer diameter of the bobbin.
[Adjustment procedure]
1. Loosen the pan head screw (S/P washer, M3x7) of the bobbin winder guide assy.
2. Move the bobbin winder guide assy. up and down, and adjust uneven bobbin winding.
3. Tighten the pan head screw (S/P washer, M3x7) of the bobbin winder guide assy.
(tightening torque: 0.59 - 0.78N · m)
4. Loosen the pan head screw (S/P washer, M3x25).
5. Turn the bobbin presser left and right, and adjust the winding quantity.
6. Tighten the pan head screw (S/P washer, M3x25) of the bobbin winder guide assy.
(tightening torque: 0.59 - 0.78N · m)
*Key point
• The target for the bobbin winding quantity is filling 80 - 90% of the diameter.
4 - 16

Bobbin winder

Bobbin winder guide assy.
Bobbin presser
Pan head screw
(S/P washer, M3x25)
Pan head screw (S/P washer, M3x7)
80-90%