If The Thread Becomes Tangled Under The Bobbin Winder Seat - Brother SB3150 Operation Manual

Troubleshooting
Note
• After completing this procedure, continue with
the following procedure in "Checking machine
operations" to check that the machine is
operating correctly.
Memo
• Since the needle may have been damaged when
the fabric was caught in the machine, we
recommend replacing it with a new one.
■ Checking machine operations
If the needle plate has been removed, check machine
operations to confirm that installation has been completed
correctly.
a Turn on the machine.
b Select stitch .
Note
• Do not yet install the presser foot and thread.
c Slowly turn the handwheel toward you
(counterclockwise), and look from all sides to check
that the needle falls at the center of the opening in the
needle plate.
If the needle contacts the needle plate, remove the
needle plate, and then install it again, starting with step
m
in "Removing the fabric from the machine" on
page A-8.
1 Opening in the needle plate
2 Handwheel
d Select stitch . At this time, increase the stitch length
and width to their maximum settings.
• For details on changing the settings, refer to "Setting
the stitch width" and "Setting the stitch length" in the
"Basic operations" section.
e Slowly turn the handwheel toward you
(counterclockwise) and check that the needle bar and
feed dogs operate correctly.
If the needle or feed dogs contact the needle plate, the
machine may be malfunctioning; therefore, contact
your nearest Brother authorized service center.
A-10
f Turn off the machine, and then install the bobbin and
presser foot.
• Refer to "Installing the bobbin" and "Replacing the
presser foot" in the "Basic operations" section.
g Correctly thread the machine.
• For details on threading the machine, refer to "Upper
Threading" in the "Basic operations" section.
Memo
• The thread may have become tangled as a result
of incorrect upper threading. Make sure that the
machine is correctly threaded.
h Perform trial sewing with cotton fabric.
Note
• Incorrect sewing may be the result of incorrect
upper threading or sewing thin fabrics. If there
are poor results from the trial sewing, check the
upper threading or the type of fabric being used.
If the thread becomes tangled under the
bobbin winder seat
If the bobbin winding starts when the thread is not passed
under the pretension disk of the bobbin-winding thread guide
correctly, the thread may become tangled under the bobbin
winder seat.
In such a case, wind off the thread according to the following
procedure.
1 Thread
2 Bobbin winder seat
2
1