Needle Size - Kenmore 1203 Instructions Manual

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ADJUSTINGYOUR SEWING MACHINE FOR GOODSTITCHES
When your sewing machine does not sew a properly locked stitch, check the following:
1. Insert a new needle of the correct size for the thread and fabric you are using.
Consult chart on page 5 for needle size.
2. The upper and bobbin thread should be the same thread.
3. Check threading carefully. See page 8-9.
4. Check the thread tension balance. Use mercerized thread and a correct size needle for the fabric you are using.
Do not try test with synthetic thread as it will not break. Begin with a full bobbin, properly threaded into the
case. Set the stitch length at about 12 stitches per inch. Fold a 6 inch square of your fabric in half diagonally,
forming a triangle. Make a line of stitching %" from fold.
a. If seam is puckered-both tensions are too tight.
b. If bottom thread is looped-tighten upper thread tension, and repeat test.
c. If top thread lays in top of fabric-loosen upper thread tension, and repeat test.
Grasp the stitching and pull evenly and firmly until one or both threads break.
a. If both threads break-tentions are balanced.
b. If neither thread breaks-both tensions are too loose.
c. If upper thread breaks-loosen upper tension.
d. If lower thread breaks-tighten upper tension.
Both threads do not have to break at the same place, but they should break on the same snap.
Bobbin tensions may also be reset by this procedure. Start with a loose bobbin thread tension.
Tighten the spring screw gradually until bobbin case and full bobbin can be gently lifted from your hand by the
end of the bobbin thread.
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