Changing From Raised-From To Flat-Form Buttonhole; Setting The Upper Needle Thread Tension; Way Of The Thread Tension Release - Dürkopp Adler 577-1111 Bedienungsanleitung

2.8 Changing from raised-from to flat-form buttonhole

2.9 Setting the upper needle thread tension

2.9.1 Way of the thread tension release

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Rule:
When the needle thread tension is open, the distance between the
releasing lever hould amount to 1,0 - 1,5 mm.
Setting:
–
Turn the crank until the needle thread tension 5 is closed.
–
Loosen the threaded pin 3 and turn the eccentric bolt 4 as far as
possible until the needle thread tension 5 opens to the max.
–
Tighten the threaded pin 3.
Rule:
When the needle thread tension is open, the distance between the
releasing lever should amount to 1,0 - 1,5 mm.
Setting:
–
Turn the crank until the needle thread tension is open.
–
Loosen the threaded pin 3 and turn the eccentric bolt 4 according
to the Rule.
–
Tighten the threaded pin 3.
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1
7
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