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The easiest way to check
tensions
is to sew a medium
zig zag stitch on the
fabric
you will
be using,
Use the appropriate
type of thread
and needle
Use different
colors of thread on the bobbin
and upper
spool
Sew a line of zig zag stitches
The bobbin
thread
should
not show
on the
top of the fabric
Adjust
the top tension
if necessary
to achieve
the stitch
balance
mentioned
above
UNBALANCED
BALANCED