Singer C440Q LEGACY Instruction Manual and Troubleshooting Guide - Page 45
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Helpful Hints PROBLEM Upper thread breaks Lower thread breaks Machine skips stitches Fabric puckers Machine makes loose stitches or loops Stitch pattern is distorted Threader does not thread through needle eye Machine does not feed properly Needle breaks Machine runs with difficulty Machine will not run CAUSE CORRECTION Page Machine not properly threaded. Thread entwined around bobbin. Needle inserted incorrectly. Thread tension too tight. Thread of incorrect size or poor quality. Re-thread machine. 19 Remove entwined thread and re-thread bobbin. 18 Re-insert needle. 9 Readjust thread tension. 15 Choose correct thread. 9 Bobbin threaded incorrectly. Re-thread the bobbin. 18 Bobbin wound unevenly or too full. Rewind the bobbin. 17 Dirt or lint in the bobbin holder. Clean the holder. 45 Needle inserted incorrectly. Bent or blunt needle. Incorrect size of needle. (on stretch fabric) Re-insert needle. 9 Insert new needle. 9 Choose correct size needle for fabric. 9 (use stretch needle) Machine not properly threaded. Re-thread machine. 19 Bobbin threaded incorrectly. Re-thread the bobbin. 18 Blunt needle. Insert new needle. 9 Thread tension too tight. Readjust thread tension. 15 Bobbin threaded incorrectly. Re-thread the bobbin. 18 Machine not properly threaded. Re-thread machine. 19 Tension not adjusted properly. Readjust thread tension. 15 Presser foot is not suited for the pattern. Attach correct foot. 8 Thread tension is not balanced. Adjust the thread tension. 15 Needle is not raised to highest position. Raise the needle. 20 Needle inserted incorrectly. Re-insert needle. 9 Bent needle. Insert new needle. 9 Feed teeth are lowered. Raise the feed teeth. 12 Stitch length not suitable for fabric. Adjust stitch length. 14 Lint and dust accumulated around feed dog. Clean the feed dog area. 45 Fabric pulled while sewing. Do not pull fabric. 21 Needle is hitting the presser foot. Select correct foot and pattern. 24- Needle inserted incorrectly. Re-insert needle. 9 Incorrect size needle or thread for fabric Choose correct size needle and thread. 9 being sewn. Dirt or lint accumulated in the hook race and Remove the needle plate and bobbin holder 45 feed dog. and clean the hook race. Cord not plugged into electrical outlet. Insert plug fully into outlet. 10 Power switch is not turned on. Turn on the switch. 10 Presser foot is not lowered. Lower the foot. 12 MAINTENANCE