Brother SE1800 Operation Manual page 202

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APPENDIX
Symptom
While winding the
bobbin, the
bobbin thread was You have not wound the bobbin
wound below the thread properly.
bobbin winder
seat.
The thread is not passed through
the bobbin-winding thread guide
correctly.
Bobbin thread
does not wind
Bobbin spins slowly.
neatly on the
bobbin.
The thread that was pulled out
was not wound onto the bobbin
correctly.
Fabric being sewn
with the machine Thread is tangled below the
cannot be needle plate.
removed.
The fabric feeds in
the opposite The feed mechanism is damaged.
direction.
The upper thread The bobbin thread is incorrectly
has tightened up. installed.
The thread is
tangled on the
You have not threaded the upper
wrong side of the thread properly.
fabric.
200
Probable Cause Remedy
After removing the thread wound
below the bobbin winder seat, wind
the bobbin correctly.
Correctly pass the thread through the
bobbin-winding thread guide.
Move the sewing speed controller to
the right (so that the speed will be
fast).
Wind the thread that was pulled off
round the bobbin five or six times
clockwise.
Lift up the fabric and cut the threads
below it, and clean the race.
Contact your dealer or the nearest
authorized service center.
Correctly install the bobbin thread.
Correct the upper threading.
Reference
page 193
page 27
page 28
page 28
page 190
–
page 29,
page 186
page 32,
page 187