Singer 15-91 - TO OPERATE THE MACHINE

20
TO REGULATE THE LENGTH OF STITCH
The machine is adjustable to make from 6 to 30
stitches per inch, as indicated by the numerals on
the stitch indicator plate W.
Ww
£19039
Fig. 17. SHowrne Lever ror Reverstne Direction
or Freep anp Reeuuatine Leneru or Strrcw
The number of stitches to the inch that the ma-
chine is set to make is indicated by the number
which is in line with the upper side of the stitch
regulating lever X.
To change the length of stitch, loosen the thumb
screw Y and move it to the bottom of the slot. Then
move the stitch regulating lever X until its upper
side is in line with the number of the desired length
of stitch. Now move the thumb screw Y until the
stitch regulating plate (inside) touches the lever X,
then tighten the thumb screw Y.
The machine will now make the indicated number
of stitches to the inch in either a forward or reverse
direction, depending on whether the lever X is at
its lowest or highest position.
21
TO REGULATE THE DIRECTION OF FEED
To feed the material from you, push down the
stitch regulating lever X, Fig. 17 as far as it will go.
To feed the material toward you, raise the stitch
regulating lever X as high as it will go.
The direction of feeding can be reversed at any
point of a seam without removing the work from
the machine,
: The reverse feed makes it easy to do ‘“‘back tack-
ing” and to fasten the ends of seams.
TO REGULATE PRESSURE ON
PRESSER FOOT
For ordinary sewing, the pressure of the presser
foot on the material seldom requires changing. Heavy
materials require more pressure than light weight
materials, The pressure should be only heavy enough
to prevent the material from rising with the needle
and to enable the feed to move the work along
evenly. To increase the pressure, turn the thumb
screw V, Fig. 16 clockwise or downward. To lighten
the pressure, turn the thumb screw so that it screws
upward.
SINGER Needles should be used
in SINGER Machines.
These Needles and their Containers
are marked with the
Company’s Trade Mark ‘“‘SIMANCO.*’’ |
Needles in Containers marked
“FOR SINGER MACHINES”
are NOT SINGER made Needles. 2
22
THREAD TENSIONS
For
ordinary
stitching,
the
needle
and
bobbin
threads
should
be
locked
in
the
center
of
the
thick-
ness
of
the
material,
thus:
758
Fie. 18. Perrecr StrrcHine
Tf
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:
Fie. 19. Tiagur Nerpie Tureap 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
underside
of
the
material, thus:
Ena
Fra. 20. Loose Negepie Tareay Pension
TO REGULATE THE
NEEDLE THREAD TENSION
The tension on the
needle thread can be
regulated only when
the presser foot is
down.
The numerals ‘‘0 to
9”’ on the dial C, Fig.
21 indicate the dif-
ferent degrees of ten-
sion that can be
obtained. The num-
bers do not denote the
size of thread or ounces
of tension.
Fria, 21, Neepie THREAD TENSION