To regulate tension of the upper thread :-
Turn the tension disc screw (Fig. 18) indicated by the arrow, and the thread will become
tight; turn it in the opposite direction, and it will become loose.
To regulate tension of the bobbin thread :-
Take out the bobbin case and turn the shuttle tension regulating screw (Fig. 19) in the
direction indicated by the arrow, and the tension of the bobbin thread will become tight;
turn it in the opposite direction, and it will become loose.
Fig.18-1
Fig. 18-2
Fig. 19
10. REGULATING STITCH LENGTH
For thick material, longer stitches are required. While for thin material, shorter ones, the
numbers shown on the stitch indicator represent the different lengths of stitches. The
larger the number, the longer the stitches; the smaller the number, the shorter the stitches.
Fig. 20
The stitch regulator of Model: KW-505 has also the function of reverse feeding that
enables you to seal stitches without the trouble of reversing the material. When you want
to seal stitches during sewing, just move the stitch shifter (Fig. 20-1) over the median line,
then the direction of the drop feed can be changed. Regulating stitch length is a very
simple process. Loosen the stitch regulating plate screw (Fig. 20-2) and lower it to the
bottom. Then move the stitch shifter to the required stitch length, and raise the stitch
regulating plate screw so that it carries the stitch regulating plate (Fig. 23-3) to meet the
stitch shifter. Now retighten the stitch regulating plate screw, and the stitches will be just
as ling as desired. Just by moving the stitch shifter up and to the top and down to the
bottom, the same stitch length can be obtained in sewing in both directions.
