Lowering Movement - Duerkopp Adler 558 Operating Instructions Manual

5.5.3 Lowering Movement

Opener setting
After the closing of the thread gripper 1 the opener lever 3 must move past behind the
opener 2 unhindered.
Thread gripper 1 must thereby remain closed.
–
Check the unhindered movement of the opener lever 1.
–
If necessary, set opener 2 accordingly with screw 9.
Insertion position
When sewing the right buttonhole seam and simultaneous manual operation of the
magnet the inserted upper thread end should be overcast.
–
Set the insertion position accordingly with setting screw 8.
Thread catcher height
The clearance between lowered thread gripper and material should be 3 - 4 mm.
This setting applies for medium-weight material. With thicker or thinner materials a
correction may be necessary.
–
Loosen screws 6 and 7.
–
Set the thread catcher height.
–
Tighten screws 6 and 7 again.
–
Check the insertion position again and correct, if necessary.
Opener
The clearance between the back of the opener 2 and the opener lever 3 must be about
0.5 mm.
–
Set the distance accordingly by turning the setting screw 8.
Slewing movement
Shortly before reaching its lowest position wird thread gripper 1, through the curve plate
5, is swung close in front of the needle.
In this position the distance between thread gripper 1 and needle must be about 3 mm.
–
Loosen screws 4.
–
Set the curve plate 5 higher or lower.
–
Tighten screws 4 again.
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