DURKOPP ADLER 540-100-1, Manual Complete

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8.2 Thread take-up spring and thread regulator
Standard:
While the thread lever is moving down from its upper dead center, the
thread take-up spring should hold the thread tight until the needle
penetrates the fabric.
Setting of the thread controller spring:
–
Loosen screw 1.
–
Turn ring 2 for altering the tension.
–
Turn case 3 for altering the spring travel.
(Spring travel 2-3 mm)
–
Tighten screw 1 again.
Setting of the thread regulator:
–
Loosen screw 4.
–
The distance 5 (inner flanks of the thread regulator) should be set
to 5 mm.
–
Tighten screw 4.
Note:
To obtain an optimal thread take-up with thick material, the regulator
should be shifted to the rear. The optimal position can be determined
through sewing tests.
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