Threading the Machine
Threading a machine is a very simple job. The
procedure may vary slightly with different models;
but after working with the various machines in
the loft, the task becomes automatic.
The component parts used in threading the
31-15 sewing machine are shown in figure 9-11.
Use this figure in studying the procedures that
follow. Pass the thread from the thread stand to
the thread post on top of the machine, right to left
throught the bottom hole, and then right to left
239.268
Figure 9-11.—Threading the 31-15 sewing machine.
through the top hole. Pass the thread from right to
left through the top hole in the thread retainer
(1). Pass the thread from left to right through the
middle hole in the thread retainer (2). Pass the
thread from right to left through the bottom hole
in the thread retainer (3). The thread is then passed
down and under from right to left between the
tension disks (4). Draw the thread up into the
thread take-up spring (5), drawing the thread up
and beyond the spring end so that it comes out in
the center of the spring. The thread is then placed
under the tension thread guard (6). Pass the thread
up and from right to left through the hole in the
thread take-up lever (7). The thread is now drawn
down through three thread guides (8), (9), and
(10). Pass the thread from left to right through the
eye of the needle (1 1). Draw about 2 inches of
thread through the eye of the needle to begin
sewing.
Removing the Bobbin Case
Before attempting to remove the bobbin case,
turn the balance wheel toward you until the needle
moves upward to its highest position.
Remove the slide in the bed of the machine
so you can see what you are doing. Reach under
the table with your left hand, and, using your
thumb and forefinger, open the bobbin case latch
(fig. 9-12) and lift out the bobbin case.
While the latch is held open, the bobbin is
retained in the bobbin case. Release the latch, turn
the open end of the bobbin case down, and the
bobbin will drop out.
Winding the Bobbin
The bobbin winder is fastened to the table with
its driving pulley in front of the sewing machine
239.269
Figure 9-12.—Removing bobbin case.
9-10
