18
Bobbin and Thread
Tension Adjustments
NOTE: See pages 37-39 for winding the bob-
bin.
Insert Bobbin into Bobbin Case
CAUTION:
To prevent personal injury always
turn off the power switch while inserting and/or
removing bobbin case or anytime your hands are
near the needle area.
1.
Place the bobbin in the bobbin case so that
the thread pulls off clockwise when viewing the
open side.
2.
Slide the thread through the slot and under
the tension spring, leaving 5-6 inches of thread
hanging loose.
Bobbin Tension
The bobbin tension is the foundation tension
for the entire machine. Always set the bobbin
tension
first
.
To test that bobbin tension is correct, hold the
bobbin case in the palm of your hand with the
open end facing up – wrap the thread around the
index finger of the opposite hand and while pulling
up on the thread move the finger side to side
(not up and down which is not consistent), the
bobbin case should lift up on its side, but
not
lift
out of your hand. If it will not lift up onto its side,
it is too loose and if it lifts out of your hand it is too
tight.
The small screw in the center of the tension spring
is where the adjustment is made (
Figure 13
).
Turn clockwise to tighten and counterclockwise to
loosen the bobbin case tension.
NOTE
: Check the bobbin tension each time a new
bobbin is inserted.
Note:
It is not suggested
that the lever on the
bobbin case be used
for this installation.
The latch lever should be
used only for removal of
the bobbin case.
Figure 14
Figure 13
