Symptom
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The upper thread appears as a single continuous line.
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The bobbin thread is visible from the upper side of the fabric. (Refer to the illustration below.)
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The upper thread has tightened up, and comes out when pulled.
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The upper thread has tightened up, and wrinkles appear in the fabric.
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The upper thread tension is tight, and the results do not change even after the thread tension is adjusted.
![img01 img01](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411670/faqh030_fig1301.gif) |
(1) Wrong side of fabric
(2) Bobbin thread visible from right side of fabric
(3) Upper thread
(4) Right side of fabric
(5) Bobbin thread |
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/check details
Correctly install the bobbin thread. Follow the steps below to correct the bobbin threading.
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Turn off the sewing machine.
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Raise the presser foot lever.
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Open the bobbin cover. Remove the bobbin from the bobbin case.
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Turn on the machine.
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Raise the needle to its highest position by pressing
(Needle position button) once or twice.
![img03 img03](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411672/faqh030_fig1303.gif)
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Turn off the sewing machine.
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Place the bobbin in the bobbin case so that the thread unwinds to the left.
![img04 img04](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411673/faqh030_fig1304.gif) |
(1) Bobbin case |
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Hold the end of the thread, push the bobbin down with your finger, and then pass the thread through the slit, as shown.
![img05 img05](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411674/faqh030_fig1305.gif)
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While lightly holding down the bobbin with your right hand, continue guiding the thread through the slit with your left hand. Then, cut the thread with the cutter.
![img06 img06](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411676/faqh030_fig1306.gif) |
(1) Slit for the quick set bobbin
(2) Cutter |
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Reattach the bobbin cover.
![img07 img07](/g/b/img/faqend/faqh00100030_013/eu_ot/en/2411677/faqh030_fig1307.gif)