Singer SM024 User Manual - Page 31

TROUBLESHOOTING Trouble Causes 1. Improper top threading. 2. Excessively tight top tension. 3. Blunt or bend needle. 4. Improper fixing of needle. Top thread broken 5. At start of sewing, top thread and bottom thread are not correctly placed beneath the presser foot. 6. Thread is unsuitable or poor quality Solution 1. Threading the top thread again. (Refer to page 7.) 2. Adjust the top tension. (Refer to page 9.) 3. Replace the needle. (Refer to page 10.) 4. Reinstall the needle. (Refer to page 10.) 5. Proper operation. (Refer to page 7, 9.) 6. Replace the proper thread. (Refer to page 10.) Bobbin thread broken 1. Bobbin not correctly placed into bobbin case. 2. Lint collected on shuttle race. 3. Bobbin is damaged, cannot smoothly rotate. 4. Wrong bobbins being used. 1. Thread bobbin thread again. (Refer to page 9.) 2. Clean the shuttle race. (Refer to page 23.) 3. Replace the bobbin. (Refer to page 6.) 4. Use only recommended style of bobbins (Refer to page 3.) Needle broken 1. Improper installation of needle. 2. Blunt or bend needle. 3. Needle clamp screw is loosening. 4. Excessively tight top tension. 5. Needle not correct style/size for fabric. 1. Reinstall the needle. (Refer to page 10.) 2. Replace the needle. (Refer to page 10.) 3. Tight the needle clamp screw. 4. Adjust the top tension. (Refer to page 9.) 5. Replace the proper needle. (Refer to page 10.) Skipping stitches 1. Improper installation of needle. 2. Blunt or bend needle. 3. Needle and/or thread unsuitable for fabric being sewn. 4. Improper top threading. 5. Needle is unsuitable for fabric being sewn. 1. Reinstall the needle. (Refer to page 10.) 2. Replace the needle. (Refer to page 10.) 3. Replace the proper needle and thread. (Refer to page 10.) 4. Threading the top thread again. (Refer to page 7.) 5. Replace the proper needle. (Refer to page 10.) 1. Excessively tight top tension. Seam puckering 2. Improper top threading. 3. Excessively thick top thread for fabric. Machine not feeding fabric 1. Feed teeth are wound by thread. 2. Thread jams. 3. Stitch length is set at "0" 1. Adjust the top tension. (Refer to page 9.) 2. Threading the top thread again. (Refer to page 7.) 3. Replace the proper thread. (Refer to page 10.) 1. Clean the feed teeth. (Refer to page 24.) 2. Clean the clamping thread. 3. Select stitch length setting longer than "0". Machine not running 1. Not surely inserting power plug. 2. Clamping thread at shuttle race. 3. Failure to replace the bobbin winding spindle to original position after winding bobbin. 1. Check the power connector. (Refer to page 3.) 2. Clean the clamping thread. 3. Push the bobbin winding spindle to original position. (Refer to page 5.) Thread jamming 1. The presser foot lifter is not lowered down when sewing. 2. Improper top threading. 3. Improper bobbin threading. 1. Rethread the machine and then lower the presser foot lifter before sewing. (Refer to page 4.) 2. Threading the top thread again. (Refer to page 7.) 3. Thread bobbin thread again. (Refer to page 9.) 27