Height Of Feed Dog (With A Differential Feed Dog) - Brother 2340CV Service Manual

Cover stitch machine

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Operation manual (40 pages)

Manuel d'instructions (41 pages)

Table Of Contents

Table of Contents

HOW TO ADJUST......

Set screw

Vertical adjusting shaft

Adjustment for height of main feed dog

1. Open the cloth plate cover, and raise needle at its highest position by turning handwheel.

2. Set the sewing pitch at "3".

3. Loosen screw 4 × 4 of vertical adjusting shaft.

4. Use a gauge to adjust the height of the feed dog so that the tips of the teeth are 0.9 - 1.1 mm above the surface of

the needle plate while turning the vertical adjusting shaft with a screwdriver.

5. After adjustment, tighten screw 4 × 4 of vertical adjusting shaft securely.

NOTE • Stitches will tend to pucker in fine fabrics or feed dog will touch needle plate, in case feed dog reaches to

higher position.

• Fabrics will not be fed sufficiently or feed dog will touch other parts like double chain looper, in case feed dog

reaches to lower position.

• Set the cut mark on the vertical adjusting shaft to the front, and then adjust the vertical adjusting shaft.

How to the gauge

Adjustment for height of differential feed dog

Differential feed dog should be the same level as upper surface of needle plate when main feed dog goes

down and reaches the same level as upper surface of needle plate. Adjust by loosening set screw of

differential feed dog.

NOTE • Adjust at position of "1.0" of feed ratio.

• Differential feed dog should not be inclined when tightening set screw of differential feed dog.

• In case difference between height of main feed dog and differential feed dog is too much, fabrics will not be

fed correctly