Bobbin And Thread Tension Adjustments - Baby Lock Crown Jewel III BLCJ18-3 Instruction And Reference Manual

Bobbin and Thread
Tension Adjustments
NOTE: See Bobbin Winding Instructions
contained in the bobbin winder carton.
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 (see Figure 16).
2.
Slide the thread through the slot (Figure 17)
and under the tension spring, leaving 5 to 6
inches of thread hanging loose (Figure 18).
Bobbin Tension
The bobbin tension is the foundation tension
for the entire machine. Always set the bobbin
tension first.
To test that the 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.
Figure 16
24
Figure 17
TENSION
SPRING
Figure 19
The small screw in the center of the tension spring
is where the adjustment is made (Figure 19).
Turn clockwise to tighten and counterclockwise to
loosen the bobbin case tension.
NOTE: Check the bobbin tension each time a new
bobbin is inserted.
Inserting the Bobbin Case into the Machine
1.
Turn off the power switch while inserting the
bobbin case or anytime your hands are near
the needle area.
2.
Do not lift the lever on bobbin case. When
placing into the machine, fit the bobbin case
onto the hook spindle in the machine. Rotate
the casing until the open throat keys into the
alignment notch in the middle of the hook.
Push the casing in until it stops in place. Push
inward until it clicks (Figure 20, page 25).
Figure 18