Singer class 251 - Sewing Preparation Steps; Thread Tension Adjustment; Perfect Stitch Appearance; Tight Needle Thread Tension

From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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TO PREPARE FOR SEWING
Hold slack end of needle thread loosely and turn machine pulley
over toward you until needle moves down and up again to its highest
point, catching bobbin thread. Draw up needle thread; bobbin
thread will come up with it through hole in throat plate, as shown in
Fig. 18. Lay both threads back under presser foot.
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Fig. 18. Drawing Up the Bobbin Thread
TO COMMENCE SEWING
Place material beneath the presser foot, lower the presser foot and
commence lo sew, turning the machine pulley over toward you.
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TO REMOVE THE WORK
1. Let the thread take-up lever rest at its highest point.
2. Raise the presser foot.
3. Draw the work toward the rear until it is clear of the needle.
4. Cut the threads close to the goods.
TENSIONS
For ordinary stitching, the needle and bobbin threads should be
locked in the center of the thickness of the material, thus:
Fig. 19. Perfect Stitch
If the tension on the needle thread is too tight, or if that on the
bobbin thread is too loose, the needle thread will lie straight along
the upper surface of the material, thus:
Fig. 20. Tight Needle Thread Tension
If the tension on the bobbin thread is too tight, or if that on the
needle thread is too loose, the bobbin thread will lie straight along
the under surface of the material, thus:
Fig. 21. Loose Needle Thread Tension