Troubleshooting, Frequent troubleshooting topics, Upper thread tightened up – Brother Innov-is 85e User Manual

Page 130

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APPENDIX

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128

Troubleshooting

If the machine stops operating correctly, check the following possible problems before requesting service.
You can solve most problems by yourself. If you need additional help, the Brother Solutions Center offers
the latest FAQs and troubleshooting tips. Visit us at “ http://solutions.brother.com ” .
If the problem persists, contact your dealer or the nearest authorized service center.

Frequent troubleshooting topics

Detailed causes and remedies for common troubleshooting topics are described below. Be sure to refer to
this before contacting us.

Upper thread tightened up

Symptom

• The upper thread appears as a single

continuous line.

• The lower thread is visible from the upper

side of the fabric. (Refer to the illustration
below.)

• The upper thread has tightened up, and

comes out when pulled.

• The upper thread has tightened up, and

wrinkles appear in the fabric.

• The upper thread tension is tight, and the

results do not change even after the thread
tension is adjusted.

a Lower side of fabric
b Lower thread visible from upper side of fabric
c Upper thread
d Upper side of fabric
e Lower thread

Cause

Incorrect lower threading
If the lower thread is incorrectly threaded, instead
of the appropriate tension being applied to the
lower thread, it is pulled through the fabric when
the upper thread is pulled up. For this reason, the
thread is visible from the upper side of the fabric.

Remedy/check details

Correctly install the lower thread.

a

Turn off the sewing machine.

b

Remove the bobbin from the bobbin case.

c

Place the bobbin in the bobbin case so that the
thread unwinds in the correct direction.

• Hold the bobbin with your right hand with

the thread unwinding to the left, and hold the
end of the thread with your left hand.
Then, with your right hand, place the bobbin
in the bobbin case.

If the bobbin is inserted with the thread unwinding
in the wrong direction, sewing will be done with
an incorrect thread tension.

Upper thread tightened up

page 128

Tangled thread on wrong side of fabric

page 129

Incorrect thread tension

page 131

Fabric is caught in the machine and cannot be removed

page 132

When the thread became tangled under the bobbin winder seat

page 135

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