Singer 72W19 - Page 14

12
THE TENSIONS
Both upper tensions are regulated by the thumb nuts in
front of the tension discs.
Both upper and bobbin case tensions should be as light as
possible
consistent with a perfect stitch.
To release the tension without disturbing the presser foot
or work, push lever (A, see Fig. 3) from you.
Caution. Do not try to adjust the tensions when the presser
foot is up. For convenience in removing the work, the tension
of the upper threads is released whenever the presser foot is
raised by the lifter, but is not released by the rising of the presser
foot as goods or seams pass under it.
LENGTH OF STITCH
The length of stitch should be governed by the kind of
material to be hemstitched; a stitch that is too short will not
leave a sufficient number of threads between the openings in
fine material to insure against their breaking.
Correctly formed stitches require careful adjustment of the
needle vibration in relation to the length of stitch and width of
bight; much however depends upon the texture of the fabric to
be
hemstitched, and necessary adjustments should be made at
each change of fabric.
TO TURN A SQUARE CORNER
After the piercer has entered the material for what is to be
the last opening in a straight line, and before the needles are
down, turn the material at right angles to the last line of openings
and proceed to stitch as before. There will be no extra hole
punctured at the corner by the auxiliary piercer.
TO REMOVE THE WORK
Have the take-up lever at its highest point; raise the presser
foot, draw the work back to the left and cut the threads close to
the goods.
From the library of: Superior Sewing Machine & Supply LLC