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23
EN
DIFFERENTIAL FEED
The differential feed has two independent
feed dogs, one front (A) and one rear (B). Each
feed dog has an individual feed mechanism
which enables the feeding of material at a
different ratio.
POSITIVE DIFFERENTIAL FEED
WHEN SET FOR POSTITVE DIFFERENTIAL FEED,
the front feed dog (A) makes a longer stroke
than the rear feed dog (B). This has the effect
of accumulating material under the presser
foot to offset the wavering on the fabric.
NEGATITVE DIFFERENTIAL FEED
WHEN SET FOR NEGATIVEDIFFERENTIAL FEED,
the front feed dog (A) makes a shorter stroke
than the rear feed dog (B). This has the effect
of stretching material under the presser foot
to offset the puckering on the fabric.
Differential feed dogs
Positive differential feed
Negative differential feed