Differential Feed - Bernina Funlock 004D Instruction Manual

Adjustments and settings

Differential feed

There are two feed dogs one front (A) and one rear
(B).
The two feed dogs move independently and the
distance each feed dog travels during one complete
movement can be adjusted.
The differential feed prevents fluting or waving in
knitted or stretch fabrics and movements between the
layers of fabric.
It also ensures pucker-free seams in smooth fabrics
such as nylon or closely woven fabric (C).
Perfectly flat seams in knits or stretch fabrics.
The distance traveled by the front feed dog should be
greater than that of the rear feed dog. The front feed
dog, therefore, feeds an amount of fabric, which the
rear feed dog, can take up behind the needle without
stretching the fabric.
Pucker-free seams in nylon or closely woven
fabrics.
The distance traveled by the rear feed dog should be
greater than that of the front feed dog. The front feed
dog, therefore, holds the fabric back so that the rear
feed dog can take it up behind the needle without any
puckering (D).
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