Duerkopp Adler 511 Service Instructions Manual page 28

4
24
3
Adjustment of the spring tension
–
Loosen screw 1.
–
Pull out the complete tension unit 2.
–
Loosen clamping screw 3.
–
Adjust thread tension regulator 4.
In direction of rotation
In the opposite direction of rotation = lower tension.
–
Tighten clamping screw 3.
–
Insert tension unit and tighten screw 1.
Adjustment of the spring travel
1
–
Loosen clamping screw 1.
–
Adjust thread tension regulator 3.
–
Tighten clamping screw 1.
2
= higher tension.