White SUPERLOCK 634D User Manual

4-6. Thread
Tension
Adjustment
Set
the
balance
of the tension
as
weak
as
possible.
To
tighten the
tension, turn
tension
dial
to a
higher
number.
To
loosen
the tension,
turn tension
dial
to a lower
number.
®
Left needle
thread tension
©
Right
needle
thread
tension
©
Upper looper
thread teqsion
Lower looper
thread tension
(2)
Unbalanced
upper looper
thread
wraps
round
and over
the
back:
Tighten
the
thread tension
of
the upper
looper
(Dial
©)or
loosen
the thread
tension
of
the lower
looper
(Dial
©).
(1)
Correct
tension.
• Lower
looper thread
and upper
thread
should be
well
balanced with
same tension.
(Both looper
threads should
make crosses
at the
edge of the
fabric.)
• Needle thread
should not
be slacken, or
pulled.
looper
thread
Right
needle
thread
Upper
looper
thread
—13—

White SUPERLOCK 634D Specifications

General

Brand	White
Model	SUPERLOCK 634D
Category	Sewing Machine
Language	English