7
Tension
of
Bobbin
Thread
and
Needle
Thread
(A)
Balanced
tension
(A)
When stitch tension is well balanced, the bobbin thread is engaged with the needle thread
at
the
center of given material thickness, as
shown
by Fig.
(A)
12^
(B)
Tight
needle
of
loose
bobbin
thread
tension
(B) Fig. (B)
shows
unbalanced
tension,
tight
needle
thread
or loose
bobbin
thread.
(C) Loose
needle
or
tight
bobbin
thread
tension
(C)
Fig.
(C)
shows unbalanced tension, loose needle thread or tight bobbin thread.
§ Adjusting Needle Thread Tension
n
To adjust tension of needle thread, turn Tension Regulating
Thumb.
By
turning
the
knurling
nut
clockwise,
needle
thread
tension
increases'-^.
By
turning
the
knurling
nut
counter-clockwise,
needle
thread
tension
decreases-*^.
§ Adjusting Bobbin Thread Tension
To
adjust
tension
of
the
bobbin
thread,
turn
Tension
Regulating
Screw.
By
loosen
set
screw
(1)
and
adjusting
tension
regulating
screw
(2).
The
set
screw
(1)
should
exactly
be
tightened
after
tension
of
the
bobbin
thread
was
adjusted.
By
turning
the
set
screw
clockwise—^,
bobbin
thread
tension
increases,
and
turning
the
set
screw
counter
clockwise'^,
bobbin
thread
tension
decreases.
- 4
To Next Page
Loading...
