DURKOPP ADLER M-type 867 Instruction Manual page 40

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38
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Fig. A:
Fig. B:
Fig. C:
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Keystone Sewing Machine Company, Inc.
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Correct thread interlacing in the center of the
material
Needle-thread tension too weak
or
hook-thread tension too strong
Needle-thread tension too strong
or
hook-thread tension too weak
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