Figure 9-13.—Winding the bobbin.
belt. The bobbin winder is so positioned to allow
the pulley to drop away from the belt when
sufficient thread has been wound on the bobbin.
Figure 9-13 illustrates the bobbin-winding
operation. The procedure is as follows: Place the
bobbin on the bobbin winder and push it on the
shaft as far as it will go. Pass the thread from the
spool down through the thread guide. Loop the
thread around back and through the tension disks.
The thread is then wound around the bobbin
a few times and the pulley pushed up against the
machine belt. The bobbin can be wound while the
machine is being used for sewing. If there is no
material under the presser foot, make certain that
the presser foot is raised and not riding on the
feed dog while winding the bobbin.
When sufficient thread has been wound on the
bobbin, the pulley on the bobbin winder drops
back from the machine belt automatically. If the
thread does not wind evenly on the bobbin, loosen
the setscrew in the tension bracket and move the
bracket to the right or left as required; then tighten
the bobbin winder stop latch screw. The amount
of thread wound on the bobbin is regulated by
the bobbin winder stop latch. To wind more
thread on the bobbin, turn the screw to the right;
to wind less thread on the bobbin, turn this screw
to the left.
239.270
Threading the Bobbin Case
Hold the fully wound bobbin between the
thumb and forefinger of the right hand with the
thread end running over the top toward the right,
as shown in figure 9-14, view A. With the left
239.271
Figure 9-14.—Threading the bobbin case.
9-11
