Tension Release - Duerkopp Adler 558 Service Instructions Manual

31. Tension Release

44
1
2
3
4
5
6
7
8
9
The upper thread tension is executed as a dual tension.
It consists of the main tension 8 and the remaining tension 3.
The remaining tension 3 serves for tautening of the upper thread for
the cutting procedure under the needle plate.
It is not opened after the seam end.
Its set tension value determines the length of the upper thread end
remaining at the seam beginning.
The opening of the main tension 8 should occur after the seam end
but before the cutting of the upper thread.
Caution Risk of Injury !
Pull the mains plug before setting.
–
With the hand crank run the machine out of the end position up to
the seam beginning.
–
Loosen screw 2.
–
Set a clearance of 1 mm between the two clamping jaws of the
thread gripper 1.
For this slide the thread gripper 1 in or out appropriately.
–
Tighten screw 2 again.
–
Loosen screw 4.
–
Align the tensioning discs of the remaining tension 3 to the thread
gripper 1.
A straight thread entry must be achieved.
–
Tighten screw 4.
–
Loosen screw 6.
–
Set a clearance of 4.5 mm between block 7 and disc 9. For this
slide bearing sleeve 5 accordingly.
–
Tighten screw 6 again.
Continued on the next page !