Threading The Bobbin Case, Adjusting The Thread Tension On Flat Buttonholes - Pfaff 3117 Instruction Manual

11 Threading the bobbin case, adjusting the thread tension
.06
on flat buttonholes
1
5
Fig. 11 - 07
Insert bobbin 1 into bobbin case2.
Pass the thread through slot 3 and under spring 4.
Then pass the thread into slot 5.
Then pass the thread into slot 6 again.
Pass the thread through eye 7.
Adjust the thread tension by turning screw 8.
Use the enclosed tool for this process.
2
6
When sewing flat buttonholes the bobbin thread must have enough tension so
that the knotting of the bobbin thread takes place on the underside of the
material.
Preparation
3 4
8
7
11 - 6