Thread Take-Up Spring - DURKOPP ADLER 867 Service Instructions Manual

2.12.2

Thread take-up spring

2
1
Caution: Danger of injury !
Turn the main switch off !
Check and set the thread take-up spring only with the sewing
machine switched off.
Standard checking
The standard setting for the spring travel and spring tension only apply
to usual thread sizes.
Very thick or very thin threads or sewing material may necessitate
different settings.
Spring travel
The thread take-up spring 1 has to keep the needle thread from the
moment of the thread lever lifting until the needle eye's penetrating of
the material under a light tension. In order to achieve a regular seam
with a low thread tension, the travel of the thread take-up spring may
be increased. The thread take-up spring must only meet the stop when
the needle eye has penetrated the material.
Spring tension
The spring tension should be lower than the thread tension.
Correction
Spring travel
–
Loosen screw 2.
–
Turn the stopping collar 4.
Turning counter-clockwise = larger travel
Turning clockwise = smaller travel.
–
Tighten screw 2.
Spring tension
–
Loosen screw 2.
–
Adjust the tensioner disc 3 without changing the stopping collar's 4
position.
Turning the disc clockwise = less spring tension
Turning the disc counter-clockwise = higher spring tension
–
Tighten screw 2 without changing the positions of the stopping
collar 4 and the tensioner disc 3.
3
4
37
GB