Singer 457 - Page 20

STRAIGHT STITCHING (Continued)
Adjusting Needle-Thread Tension
The tension
dial regulates the degree
of tension on your needle
thread .
Set it according to the
type of thread and fabric you use .
The
numbers eliminate
guesswork in duplicating settings .
Correct tension is important
because too much
or too little will
weaken your seams or
cause your fabric to pucker .
Make a test
sample with the
fabric and thread you plan to
use, and examine it .
A perfect
stitch will have the needle and
bobbin threads locked
between
the two layers of fabric with
no loops on top or bottom
and with no puckers .
1 8
Tension Dial
If stitches look loose,
increase
needle-thread tension
. If the fabric
puckers,
decrease tension .
(For detailed instructions on ad-
justing zig-zag satin stitch tension,
see page24 .)
" To increase tension, turn
dial to
higher number .
" To decrease tension,
turn dial to
lower number .
Tension Too Loose
l
Tension Too Tight
Balanced Tension