Differential feed, Differential feed mechanism, Adjusting the differential feed – SINGER WSL1634 User Manual
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The differential feed prevents wavy seams in knitted fabrics and also movement between the layers
of fabric. It also ensures pucker-free seams on lightweight fabrics.
[ DIFFERENTIAL FEED MECHANISM ]
There are two sets of feed teeth, one front and one rear. The two sets of feed teeth move
independently. Differential feed allows the two sets of feed teeth to move at different rates.
[ ADJUSTING THE DIFFERENTIAL FEED ]
The differential feed can be adjusted by simply turning the differential feed adjustment knob in the
direction desired. Adjustment of the differential feed can be made while sewing.
When sewing without differential feed, the adjustment knob for the differential feed should be set on
the "N" position.