The slightly zigzag in the stitches are due to how the stitches are formed. The bobbin thread gets looped around the top thread in the same direction each time and it just creates a slight slant. It shows up on some fabrics more and some machines do it a little more than others.
Why is my stitch not straight?
If your thread is pulled tight on the underside and not forming an even stitch then (counter-intuitively) it’s usually the top thread tension that’s wrong. Sometimes very lightweight fabrics such as sheers can get dragged down into the machine so it’s a good idea to use a straight stitch plate.
Why does my bobbin thread look wavy?
The issue is bobbin thread tension. A build up of lint can cause that.
Why does my top stitch look wrong?
Needles, threads, and fabrics: Different thread sizes and types on top and in the bobbin can throw off basic tension settings. A needle that’s too large or small for the thread can also unbalance your stitches, because the size of the hole adds to or reduces the total top tension.
What number should the tension be on a sewing machine?
As the bobbin thread tension is factory-set and wouldn’t usually be adjusted for normal sewing. So we’ll be talking only about the top thread tension since that’s where you’d usually make the adjustments. The dial settings run from 0 to 9, so 4.5 is generally the ‘default’ position for normal straight-stitch sewing.
Why is my straight stitch zig zag?
If the upper thread appears as a single line, the lower thread is incorrectly threaded. Instead of the appropriate tension being applied to the lower thread, it is pulled through the fabric when the upper thread is pulled up.
What are the normal settings for a sewing machine?
Most sewing is done in the 2.0 to 2.5 range. If you are foundation paper piecing, you may want to decrease your stitch length so that the paper tears away easier. Top stitching and quilting are usually done in the 3.0 to 3.5 range. Basting and gathering stitches are the longest, from 4.0 – 5.0.
How do you adjust the tension on a bobbin?
When making changes to bobbin tension, increasing or decreasing, turn the large screw on the bobbin case in small increments. If you think of the large screw as a face of the clock, adjust the screw in 15-minute increments, test, and adjust again if necessary.
What will you do if there is a problem with the stitch tension of the upper thread?
If the tension isn’t perfect, fix it by adjusting the bobbin spring; tighter if the bobbin thread shows on the upper layer, and looser if the needle thread shows on the underlayer. Make another test seam, and examine the stitches, repeating until the stitch is balanced.
What does a straight stitch look like?
A straight stitch is a strong stitch that’s straight with a thread on top (the upper thread) and a thread on the bottom (the bobbin thread), with the threads interlocking at regular intervals. … When a straight stitch is puckering your fabric, it can usually be resolved by lengthening the stitch length.
How do you tell if your bobbin tension is off?
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.
What width should my sewing machine be on?
A straight stitch has no width so it makes sense to set the dial at “0”. However, each machine varies so you will want to set the Stitch Width dial at the position where the needle is centered over the stitch plate. This will give you the most accurate seam allowance.
What causes thread to bunch up when sewing?
What should I do if I experience thread bunching? 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. … On many models, the upper thread tension is set automatically.
What thread tension should I use for denim?
Tension is ideal up to 6, but is too high after that and pulls the top stitch into a flat line. Regular thread, bobbin thread view. The bobbin stitches clear up around 6 but don’t improve much after that.