Singer 15-90 - Page 22

20
Tensions
For ordinary stitching, the needle and bobbin
threads should be locked in the center of the thick-
ness of the material, thus:
Oar 717
FIG. 15. PERFECT STITCH
If the tension on the needle thread is too tight, or
if that on the bobbin thread is too loose, the needle
thread will lie straight along the upper surface of
the material, thus:
ElINS
FIG. 16. TIGHT NEEDLE THREAD TENSION
If the tension on the bobbin thread is too tight,
or if that on the needle thread is too loose, the bobbin
thread will lie straight along the under side of the
material, thus:
$ 1
1329
, FIG.  L OOSE NEEDLE THREAD TENSION
To Regulate the Needle Thread Tension
The tension on the needle thread can be regulated
only when the presser foot is down.
The numbered
dial (C, Fig. 18) is
marked with num-
bers ranging from
0
to 9, which indicate
different degrees of
tension which can be
produced. The num-
bers do not denote
a particular size of
thread.
813356

l 
By noting the
o. 18. NEEDLE THREAD TENSION
- 
number which is op-
20
Tensions
For
ordinary stitching, the needle and bobbin
threads should be locked in the center of the
thick-
ness
of the material, thus:
FIG.
15. PERFECT STITCH
If
the tension on the needle thread is too tight, or
if
that on the bobbin thread is too
loose,
the needle
thread
will
lie straight along the upper surface of
the material, thus:
E1J3J9
FIG.
16. TIGHT NEEDLE THREAD TENSION
If
the tension on the bobbin thread is too tight,
or if
that on the needle thread is too
loose,
the bobbin
thread
will
lie straight along the under
side
of the
material,
thus:
FIG.
17. LOOSE NEEDLE THREAD TENSION
To
Regulate
the
Needle
Thread
Tension
The
tension on the needle thread can be regulated
only
when
the presser
foot
is down.
.
The numbered
A
Q . I
/I
dial
(C, Fig. 18) is
marked
with
num-
bers ranging from 0
to 9,
which
indicate
different
degrees
of
tension
which
can
be
produced.
The
num-
bers do not
denote
a
particular size of
thread.
By
noting the
number
which
is op-
E13356
I
Hi.
18.
NEKULK
lHKb:Au
TENSION -