Duerkopp Adler 558 Service Instructions Manual page 74

1
2
3
4
5
6
74
Caution Risk of Injury !
Pull the mains plug before adjusting.
–
Bring the machine into its end position.
–
Tilt the machine head up.
–
Loosen lock nut 2.
–
Set the clearance.
The clearance between housing 1 and the lower edge the latch 3
should be 42 mm.
Through this clearance a flawless running of the latch 3 onto the
thread pulling angle 5 is achieved.
–
Tighten lock nut 2 again.
–
Loosen screws 4 and 6.
–
First set the thread pulling angle 5 at the middle of the slot.
–
Tighten screws 4 and 6 again.
–
By turning the handwheel check the thread quantity at the first
needle stitch of the buttonhole seam.
If necessary correct the position of the thread pulling angle 5:
in arrow direction + = more underthread
in arrow direction - = less underthread