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Presser foot
pressure
Figure 18
Figure 19
14
Ultra High Speed Overedge and Safety Stitch Machine | Instruction Manual and Parts List
3.9
Loosen adjusting nut ‘1’ of Figure
18 and turn adjusting bar ‘2’ to
adjust the presser foot pressure.It
The differential feed ratio is the
ratio of movements between the
main feed dog and differential feed
dog. When the movement of main
feed dog is bigger than the differen-
tial feed dog, the fabric is stretched
Adjusting the
Differential
Feed Rate
3.10
at sewing. Otherwise the fabric will
be shrunk.
Loosen the adjusting nut 1 and turn
the adjusting nut 2 to adjust the
differential feed ratio. As shown on
Figure 19.
To stretch
To shrink
2
1
1
2
Heavy
Light
should be as light as possible to be
sufficient to obtain the proper stitch
formation.