Tension pucker is caused while sewing with too much tension, thereby causing a stretch in the thread. After sewing, the thread relaxes. As it attempts to recover its original length, it gathers up the seam, causing the pucker, which cannot be immediately seen; and may be noticeable at a later stage.
Why does my sewing machine keep gathering?
As “thread bunching” occurs on the underside of the fabric, some people think it is due to the lower thread. They check whether the bobbin is sitting correctly in the bobbin case or even replace the bobbin. This does not usually change the situation.
How do you fix a puckering seam?
REMEDIES for Puckered Seams
- Stitch with ‘taut sewing technique’. I always teach my students that your left hand belongs BEHIND the needle, and the right hand in front of the (as in the video), simply snip every 3-4 threads, stretch and press, then stitch again with TAUT sewing.
- MELD the seam.
Why does my thread bunch up underneath?
A: Looping on the underside, or back of the fabric, means the top tension is too loose compared to the bobbin tension, so the bobbin thread is pulling too much top thread underneath. By tightening the top tension, the loops will stop, but the added tension may cause breakage, especially with sensitive threads.
How do you fix bobbin tension?
To tighten your bobbin tension, turn the tiny screw on the bobbin case a smidgen clockwise. To loosen bobbin tension, turn the screw counterclockwise. A quarter turn or less is a good place to start.
Why is my zigzag puckering?
Polyester thread stretches more than cotton. When wound onto a bobbin, the thread accrues additional tension. The sewing machine applies even more tension to the thread during stitching. After a seam is sewn, the thread relaxes, drawing up the fabric and creating puckers.
What is the common cause of puckering of seams breaking of needles and threads?
Causes of Puckered Seams
Puckered threads across seams are due to a blunt needle or too large a needle. Stitches are too short for synthetic and easy care fabrics. Using a plate with a wide needle hole may cause straight seams to pucker.