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

(4)

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).

(3)

 

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

 

 

Material is pulled

 

Prevents thin mate-

 

 

tight.

 

rials from puckering

 

 

 

 

 

 

 

 

 

 

1.0

 

 

Without differential

 

Normal sewing

 

 

feed.

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0 – 2.0

 

 

Material is gath-

 

Prevents stretch ma-

 

 

ered or pushed

 

terials from stretch-

 

 

 

together.

 

ing or puckering

 

 

 

 

 

 

ENGLISH

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Image 7
Brother 2340CV operation manual Stitch length, Instructions for the differential feed mechanism