Lift Cam And Feed-Dog Height - Duerkopp Adler 271 Service Manual

2.3 Hub cam and feed-dog height
1
2
3
4
5
Regulation and inspection
With the sewing machine locked in position B (class 271/273/275) or
position E (class 272/274) markings 3 and 6 of the lift cam 7 and the
connecting rod 8 must be in line.
In its highest position the feed dog should protrude by 0.9 or 1.1 mm in
the region of the needle hole:
0.9 mm with a fine-toothed feed dog
1.1 mm with a coarse-toothed feed dog.
Caution: danger of injury
Turn off the main switch.
The lift cam and feed-dog height may only be adjusted with the sewing
machine turned off.
Lift-cam adjustment
–
Undo both screws of the lift cam 7.
–
Lock the sewing machine:
class 271/273/275: in position B
class 272/274:
–
Rotate lift cam 7.
The markings 3 and 6 must be in line.
–
Retighten both screws of lift cam 7.
Feed-dog height adjustment
–
Lock the sewing machine:
class 271/273/275: in position B
class 272/274:
–
Undo screw 1.
–
Rotate eccentric bolt 2.
In its highest position the feed dog should protrude by 0.9 or
1.1 mm in the region of the needle hole:
0.9 mm with a fine-toothed feed dog
1.1 mm with a coarse-toothed feed dog.
The position of the eccentric bolt 2 depends on the adjustment of
eccentric bush 4 in the advance lever 5. See section 2.3.1.
–
Retighten screw 1.
in position E.
in position E.
6
7
8
9