SINGER 331K4 - Manual (Page 8)

Fig. 17. Perfect Stitch
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. 16.
• Lay both threads back under presser foot.
• Close the bed slide.
• Always keep the bed slide closed when the
machine is in operation.
TO START SEWING
• Move take-up lever to top of its stroke as shown
in Fig. 8, page 6.
• Place material beneath the presser foot. Lower
the presser foot. Start to sew, turning the machine pulley
over toward you.
TO TURN A CORNER
• Stop the machine when needle is rising but before
it is out of the material.
• Raise the presser foot.
• Turn material for next line of stitching, using needle
as a pivot.
• Lower the presser foot.
• Resume sewing.
• Avoid aiding the machine by pulling the fabric,
lest you damage the needle. The machine feeds the
work without assistance.
TO REMOVE THE WORK
• Stop the machine with the take-up lever at top of
its stroke.
• Raise the presser foot.
• Draw the work toward the rear until it is clear of
the needle.
• Cut the threads close to the goods.
• Lay the threads back under the presser foot.
Fig. 18. Too Tight Needle Thread Tension THREAD TENSION
For ordinary stitching, tension on needle and bob­
bin threads should be balanced with needle and
bobbin threads locked in centre of thickness of
material as shown in Fig. 17.
When there is too much tension on needle thread and
not enough on bobbin thread, needle thread cannot be
pulled down into material, as required. Poor stitching
results. Needle thread will lie on top of material as
shown in Fig. 18.
When there is too much tension on bobbin thread and
not enough on needle thread, you get the reverse of
the condition shown in Fig. 18. The stitching is just as
poor. The bobbin thread will lie on bottom of mate­
rial as shown in Fig. 19.