When the tension is set too high, the thread is stretched greatly from the spool to the needle, causing great tension in the thread and thus the upper thread breaks during sewing. You can reduce the thread tension to see if it improves. A lower number indicates a lower level of tension.
What causes thread to break while sewing?
Your Thread Tension Is Too Tight
If you don’t, the tension can be uneven and cause your thread to break. Sewing machine manufacturers suggest that you don’t mess with your bobbin thread tension too much, but you should adjust your upper thread tension if your thread keeps breaking while you sew.
What tension should my sewing machine be on?
The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing. This should be suitable for most fabrics. If you are doing a zig-zag stitch, or another stitch that has width, then you may find that the bobbin thread is pulled through to the top.
What is the remedy when the upper thread breaks?
Remedies: Check the threading order and thread correctly. Adjust the tension disc. Replace blunt or bent needles.
A dirty shuttle race, improper thread routing or incorrect thread tension can break the bobbin thread in a sewing machine. Unplug the sewing machine and check thread routing according to guidelines in your owner’s manual. Reroute the thread correctly if necessary.
What is the cause of lower or under thread breaks?
The tension of lower thread is too tight
Like upper thread, lower thread breaks with accumulated strain when working with an excessively high tension. Lower the thread tension to see if the sewing improves. Working with a suitable tension can prevent lower thread from breaking.
What tension should I use for cotton?
Cotton requires a moderate tension setting, usually between three and four.
Why does cotton keep breaking on sewing machine?
The upper thread tension could be set too tight. Set the tension to the best thread tension setting or less. Make sure the spool of thread is installed correctly using the correct size spool cap for the size of spool. … Check that the bobbin is wound so that it about 80% full and that the thread is evenly wound.
How do I know if my bobbin tension is correct?
The thread should unwind just slightly and the bobbin case should drop an inch or two. If the thread unwinds without resistance and the case slips to the floor, your bobbin tension is too loose. If the bobbin case doesn’t budge, your bobbin tension is too tight.
Why does my thread keep shredding?
The most common reason why thread shreds, frays, or breaks at the needle is because the eye is too small to accommodate the thread, causing stress and friction, which results in shredding or breaking the top thread.