Pfaff ClassicStyle 2027 Owner's Manual - Page 46

Maintenance Sewing problems and their solutions Problem/Cause The machine skips stitches The needle is not properly inserted. Wrong needle is in use. Needle is bent or blunt. The machine is not properly threaded. Needle is too small for thread. Remedy Push needle fully upwards. Flat side facing the back. Use needle system 130/705 H. Insert a new needle. Check how the machine is threaded. Use a larger needle. Needle thread breaks See reasons above. Thread tension is too tight. Thread is poor or has slubs in it, or has become dry after overlong storage Thread is too thick. See above. Adjust thread tension. Only use good quality threads. Use needle with large eye (system 130 N). Needle breaks off Needle is not pushed fully in. Needle is bent Needle is too thick or too thin. Needle is bent, and has hit the needle plate because you are pulling or pushing the fabric. The bobbin case is not properly inserted. Insert new needle and push fully in. Insert different type of needle. Insert different type of needle. Only guide the fabric lightly. When you insert the bobbin case, push it fully into the stop. Pull lightly on the end of the thread to make sure bobbin case is secure. The seam is sewn unevenly The tension needs adjusting. Thread is too thick, stubbed or hard. The bobbin thread is unevenly wound. Thread loops at top or underside of fabric. Check needle thread tension. Only use good quality threads. Do not wind thread by hand. Make sure thread is pulled solidly into bobbin tension spring. Check bobbin threading path. Re-thread machine, making sure presser foot is raised to its highest position. This ensures that needle thread is securely in thread tension system. 4:3