Lift Movement Of The Feed Dogs - Duerkopp Adler 550-12-12 Service Instructions Manual

3.6 Lift Movement of the Feed Dogs

The lift movement of the feed dogs is determined by the position of the
cam 2 on the lower shaft.
The needle bar must have started a hole (fixed) in the material during
the needle bar downward movement when the feed dogs are flush with
the upper edge of the needle during their lift out of the needle plate.
If the feed dogs lower below the needle plate before the needle starts
a hole in the material, the bunched crimping will slide out again and be
lost.
Caution Risk of Injury !
Turn off main switch before adjusting.
–
Arrest the machine head in position C (3 notches visible).
–
Loosen both screws 1 on the lift cam 2.
–
Set the lift cam.
When the differential feed dog is flush with the needle plate, the
distance from the needle eye lower edge to the needle plate is 1
mm.
–
Align the lift cam axially.
The sprocket of the lift cam runs centered to the sprocket of the
take-up lever disc.
–
Check the position of the take-up lever disc and correct if
necessary.
1
2
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