Needle Thread Tension Release - Pfaff 939 U Instruction Manual

Adjustment
12

Needle thread tension release

.06.05
● Unscrew the thread wiper.
● Turn nut 1 (nut 2) in accordance with the requirements.
● Screw thread wiper back into place.
12 - 52
Requirement
1. When solenoids 3 are activated, the tensions disks 4 should be at least 0.5 mm apart.
2. When the thread trimmer is in its neutral position and the sewing foot is positioned on
the needle plate, the tension should be fully effective.
3
Fig. 12 - 51
On the PFAFF 3704-2/02 both tension units are released.
1
2
92-047
0,5 mm
4
57-05