Pfaff coverlock 4.0

Stitch adjustments40
Chainstitch
When the chainstitch needle thread tension is too loose ,QFUHDVHWKHQHHGOHWKUHDGWHQVLRQEOXHRUGHFUHDVHWKH
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Coverstitch
When the coverstitch looper thread is too loose ,QFUHDVHWKHFRYHUVWLWFKORRSHUWKUHDGWHQVLRQSXUSOH
When the coverstitch left needle thread tension is too
loose
Increase the coverstitch left needle thread tension
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When the coverstitch middle needle thread tension is too
loose
Increase the coverstitch middle needle thread tension
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When the coverstitch right needle thread tension is too
loose
Increase the coverstitch right needle thread tension
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When the top surface of fabric bulges between needle
threads and the seams on the underside of the fabric
becomes tight;
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