Brother 888-E31 Operation Manual page 69

■ After sewing
Symptom
The upper thread The bobbin thread is incorrectly
installed.
has tightened up.
You have not threaded the upper
thread properly.
You have not wound the bobbin
thread properly.
The bobbin thread is incorrectly
installed.
You have not threaded the right com-
The thread
bination of thread and needle for the
tension is
fabric you are using.
incorrect.
You have not attached the presser-foot
holder properly.
The thread tension is incorrect.
You have not used a bobbin that has
been designed for this machine.
Bobbin is set incorrectly.
The thread is
tangled on the You have not threaded the upper
thread properly.
wrong side of the
fabric.
The presser foot you are using is not
appropriate for the type of stitch that
you want to sew.
The thread tension is incorrect.
The stitch is not
sewn correctly.
The thread is tangled, for example, in
the race.
The stitch adjustment level is
incorrect.
Possible cause How to put it right
Correctly install the bobbin thread.
Correct the upper threading.
Wind the bobbin thread properly.
Correctly install the bobbin thread.
Choose a thread and needle that are
appropriate for the type of fabric.
Attach the presser-foot holder
properly.
Adjust the tension of the upper thread.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Reset the bobbin thread correctly.
Correct the upper threading.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
Adjust the tension of the upper thread.
Remove the tangle thread. If the
thread is tangled in the race, clean the
race.
Adjust the stitch.
Reference
page 13, 59
page 15
page 10
page 13
page 19
page 23
page 26, 59
page 10
4
page 13, 14
page 15, 59
page 50
page 26, 59
page 57, 59
page 49
67