Thread Controller Spring - Duerkopp Adler 506 Service Instructions Manual

8. Thread Controller Spring

2 3 4
26
1
5
Spring path
When the needle enters into the material the thread controller spring 1
must lay onto the thread tension carrier 6.
When the eye of the needle enters into the material the spring is just
then relaxed.
To correct:
–
Loosen clamping screw 5.
The clamping screw 5 is behind the thread return roller 2 under the
machine arm.
–
Turn the thread tension carrier 6.
–
Tighten clamping screw 5.
Spring tension
The spring must hold the drawn-forward thread taut until the eye of the
needle enters into the material.
The necessary spring tension is dependent on the material to be sewn.
To correct:
–
Remove the securing collar 3 and washer.
–
Pull off the thread return roller 2.
–
Loosen screw 4 slightly.
–
Secure screw 4 against turning with a screwsdriver.
–
Set the spring tension by turning the knurled nut 7.
Turning clockwise
Turning counterclockwise
–
Hold the knurled nut 7 and tighten screw 4.
–
Attach the thread return roller 2 again.
–
Attach the washer and securing collar 3.
6
7
= Increase spring tension
= Decrease spring tension