Needle Thread Tension - Pfaff 3117 Instruction Manual

14

Needle thread tension

.14
Requirement
1. The tension 1 must remain open for approx. 3 stitches when starting sewing.
Before beginning the first bartack the tension 1 must also be open for 3 stitches.
2. The tension 2 must be open for a minimal movement of the lever 3.
4
Fig. 14 - 35
Engage the stop motion device.
Bring the machine into the left buttonhole seam position.
Loosen screw 4 and push plunger 5 in the clamp eye 6 up as far as possible.
Tighten screw 4.
Turn the control cam by turning the handwheel until the plunger 5 is fully in use.
Loosen nut 7 so that there is a clearance of 1 mm between screw 8 and the housing.
Continue turning the handwheel until the plunger 5 begins to drop and screw 8 is tou-
ching the housing.
Loosen screw 9 and move the disengaging rod assembly 10 so that the tension 1 is
opened by a minimal movement of the lever 11.
Tighten screw 9.
10
9
1.0 mm
7 8
6
5
Adjustment
2
1
11
14 - 37