Pfaff coverlock 4772

8. Setting the differential feed-dog height
Requirement:
The main feed dog 13 and the differential feed dog 14 must be positioned at the same height.
Check:
● Set the maximum stitch length and the maximum differential stroke.
●Turn the handwheel in the normal direction until the descending main feed
dog is flush with the surface of the needle plate (figure 15).
● Carry out a visual check.
Setting:
● Loosen the screw 15 on the differential feed dog.
● Move the differential feed dog until the feed dog is flush with the surface of the needle plate.
● Tighten the screw 15 on the differential feed.
Test:
● Carry out a visual check.
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