Controls – SINGER W1640 User Manual
Page 17
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CONTROLS
upper Thread Tension too strong
Upper Thread Tension too weak
Pig. 22
Section
4
TENSION OF UPPER THREAD
An important point when sewing is
to make sure that the thread tension
is correct. The Thread Tension Dial
is marked with 0 to 9. Normal thread
tension is obtained by setting the Dial
at
5
against
the
top hook. Your
machine has been tested using the
thread supplied, and with the Dial
set at 5. It might prove necessary to
adjust the tension slightly when using
threads or fabrics of different thick
ness.
By
Turning
Thread
Tension
Dial
counterclockwise close to
0
, upper
thread will be pulled down below and
lower thread lies straight. By turning
dial
clockwise
close
to
9,
upper
thread will be straight and lower
thread forms loops on the top side.
(Fig. 22)
Thread tension is correct when stitch
knots occur in the mid-layer of ma
terial. Before sewing garment, try to
make a sample on a double folded
scrap of material with which to test
various tensions by sewing to make
certain tension is correct.
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