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APPENDIX
139
5
Cleaning the bobbin case
Thread wax and dust easily collect around the hole in the
tension-adjusting spring on the bobbin case, resulting in an
incorrect thread tension. Therefore, it should be cleaned each
time when the bobbin is changed.
Use a piece of paper with the thickness of a business card.
a
Open the hook cover, remove the bobbin case, and
then remove the bobbin. (page 35)
b
Slide the paper under the tension-adjusting spring to
remove any dust.
Use a corner of the paper to remove any dust from
around the hole.
1 Tension-adjusting spring
2 Hole
3 Paper
c
Use the included cleaning brush to remove any lint and
dust from inside the bobbin case.
d
After cleaning is finished, insert the bobbin into the
bobbin case and the bobbin case into the hook, and
then close the hook cover. (page 36)
Cleaning the thread paths of the upper
threads
If dust or lint has accumulated in the thread guides or tension
unit in the paths of the upper threads, the thread may break
while embroidery is being performed. Periodically clean the
thread paths.
■ Cleaning the thread guides
a
Use the included cleaning brush to remove any lint and
dust from below the thread guide plates.
Clean the thread guide plates for both the upper thread
guides and the middle thread guides.
1 Upper thread guide
2 Middle thread guide
1 Thread guide plate
Note
• Do not bend the tension-adjusting spring. In
addition, do not use anything other than thick
paper or paper of the specified thickness to clean
the bobbin case.
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