Pfaff 16 Owner's Manual - Page 14

3. The thread curls owing to its being unsuitably spun and glossed for your purpose change the thread. 4. The needle used is not of the system marked on the bedplate stide of your machine - obtain the correct needle from the suppliers of your machine. The Needle breaks 1 The needle is wrongly inserted, or it is bent - change it (see page 5: "Setting the Needle"). 2. The needle is too fine for the thread or fabric - use a thicker needle (see page 4: "Relative Needle Sizes and Thread Numbers"). 3. The upper thread tension is too strong - loosen the ten sion (see page 10: "Regulating the Thread Tensions"). Faulty Feeding 1. Dirt and fluff are interfering with the free movement of the feed dog, causing intermittent feeding of the material - unscrew needle plate, and thoroughly clean the feed. 2. The stitch length is too small - correct the setting on stitch reguloting lever, The Material puckers 1. Both tensions are too tight -.- loosen them (see page 10: "Regulating the Thread Tensions"). 2. The pressure exerted by the presser bar is too severe - reduce the pressure by turning the pressure adust ment screw anticlockwise. 22 3. The presser foot has been attached wrongly -.- reset it to its correct position; (see page 6: "Attaching the Presser Foot"). Tighten the retaining screw with the aid of a screwdriver. Uneven Stitching 1. The thread is not uniformly spun, or it is too thick - use a different thread. 2. The tension is wrong - regulate the thread tension (see page 10: "Regulating the Threod Tensions"). 3. Upper and under thread let-off ore unequal owing to a dirty tension disc or clogged shuttle - clean the parts affected. 4. The needle is either blunt or bent - insert a new needle. 5. The shuttle has been threaded incorrectly - remove the bobbin from the shuttle and then replace the former, making sure that the thread is correctly positioned (see page 8: "Under Threading"), 23