Adjusting The Needle Thread Tension - Pfaff 3119 Instruction Manual

9

Adjusting the needle thread tension

.07
Fig. 9 - 06
Thread and insert the bobbin case according to the required type of buttonhole, see
Chapter 9.03 Inserting the bobbin case / adjusting the bobbin thread tension.
Switch on the machine and select the required type of buttonhole ( purl or flat
buttonholes ) on the control panel, see Chapter 9.06 Selecting the type of buttonhole.
For purl buttonholes ( A ):
Open tension unit 1 to the full extent and adjust tension unit 2 so that the stitches are
interlooped in the centre of the material.
Adjust tension unit 1 so that the interloops of the purl seam stitches are pulled upwards.
For flat buttonholes ( B ):
Adjust tension unit 2 ( less tension ) so that the interloops of the stitches are pulled to the
bottom side of the material.
1
Carry out the adjustment with different coloured needle and bobbin threads.
2
A
56-017a
Setting up
B
56-017b
9 - 7