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Troubleshooting
Checking the lower thread tension
Attention:
The lower thread tension must
only be changed if adjusting the upper thread
tension does not lead to a satisfactory result.
If a full bobbin has been inserted correctly and
if you lift the bobbin and the bobbin case by
the lower thread, the bobbin case must just
stick to the thread. Only then is the
compressive force of the tension spring set
correctly.
The lower thread tension is set by turning the
screw with a small screwdriver.
Содержание N 1235-61
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