Brother International Innov-is XJ1 Operation Manual - Page 181
Tangled Thread on Wrong Side of Fabric, Incorrect Thread Tension
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■ Cause Incorrect bobbin threading If the bobbin thread is incorrectly threaded, instead of the appropriate tension being applied to the bobbin thread, it is pulled through the fabric when the upper thread is pulled up. For this reason, the thread is visible from the right side of the fabric. ■ Remedy Correctly install the bobbin thread. (page 40) Tangled Thread on Wrong Side of Fabric ■ Symptom * The thread becomes tangled on the wrong side of the fabric. TROUBLESHOOTING Incorrect Thread Tension ■ Symptoms • Symptom 1: The bobbin thread is visible from the right side of the fabric. • Symptom 2: The upper thread appears as a straight line on the right side of the fabric. • Symptom 3: The upper thread is visible from the wrong side of the fabric. • Symptom 4: The bobbin thread appears as a straight line on the wrong side of the fabric. • Symptom 5: The stitching on the wrong side of the fabric is loose or has slack. Symptom 1 Symptom 3 c a b d a f c d * After starting sewing, a rattling noise is made and sewing cannot continue. * Looking under the fabric, there is tangled thread in the bobbin case. ■ Cause Incorrect upper threading If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise. ■ Remedy Remove the tangled thread, and then correct the upper threading. a Remove the tangled thread. If cut the thread with scissors. it cannot be removed, * Refer to "Cleaning the Race" on page 176. b Remove the upper thread from the machine. c Correct the instructions upper threading by following the in "Upper Threading" on page 42. * If the bobbin was removed from the bobbin case, refer to "Setting the Bobbin" on page 40 to correctly install the bobbin. e e 1 Wrong side of fabric 2 Bobbin thread visible on right side of fabric 3 Upper thread 4 Right side of fabric 5 Bobbin thread 6 Upper thread visible from wrong side of fabric ■ Cause/Remedy Cause 1 The machine is not correctly threaded. The bobbin threading is incorrect. Adjust the upper thread tension and then refer to "Upper Thread is Too Tight" on page 178. The upper threading is incorrect. Adjust the upper thread tension and then refer to "Tangled Thread on Wrong Side of Fabric" on page 179 to correct the upper threading. Cause 2 A needle and thread appropriate for the fabric are not being used. The machine needle that should be used depends on the type of fabric sewn and the thread thickness. If a needle and thread appropriate for the fabric are not being used, the thread tension will not be adjusted correctly, causing wrinkles in the fabric or skipped stitches. * Refer to "FABRIC/THREAD/NEEDLE COMBINATIONS" on page 49 to check that a needle and thread appropriate for the fabric are being used. Cause 3 An appropriate upper tension is not selected. Select an appropriate thread tension. Refer to "Setting the Thread Tension" on page 62. The appropriate thread tension differs according to the type of fabric and thread being used. Appendix 7 179