Sewing Machine Operation Manual

5
ENGLISH
Stitch length
To change the stitch length,
(1)Locate the stitch length adjustment dial on the left side
of the machine.
(2)Turn the stitch length adjustment dial forward to
lengthen the stitch to a maximum of 4 mm (5/32 inch).
Turn the stitch length adjustment dial backwards to
shorten the stitch length to a minimum of 2 mm (5/64
inch).
(3)The normal stitch length setting is 3 mm to 4 mm
(1/8 to 5/32 inch)
Instructions for the differential feed mechanism
This machine is equipped with two sets of feed dogs
under the presser foot to move the fabric through the
machine. The differential feed controls the movement of
both the front and the rear feed dogs. When set at 1, the
feed dogs are moving at the same speed (ratio of 1).
When the differential feed ratio is set at less than 1, the
front feed dogs move slower than the rear feed dogs,
stretching the fabric as it is sewn. This is effective on
lightweight fabric that may pucker. When the differential
feed ratio is set at greater than 1, the front feed dogs
move faster than the back feed dogs, gathering the fabric
as it is sewn. This function assists in removing the rippling
when serging stretch fabrics.
• To adjust the differential feed.
(1)Locate the differential feed adjustment lever on the left
side of the machine.
(2)The normal setting is 1.0 on the differential feed
adjustment lever.
(3)To set less than 1.0, move the lever back.
(4)To set greater than 1.0, move the lever forward.
Feed ratio Main feed (rear) Differential feed (front) Effect Application
0.7 – 1.0
1.0
1.0 – 2.0
Material is pulled
tight.
Without differential
feed.
Material is gath-
ered or pushed
together.
Prevents thin mate-
rials from puckering
Normal sewing
Prevents stretch ma-
terials from stretch-
ing or puckering
(3)
(4)