If a needle thread forms loose loops on the underside of the fabric or if the seam pulls open, the needle thread is too loose. If threads lock on the upper side of the fabric, either the upper looper threads are too tight, pulling the upper side, or the lower looper threads are too loose, spilling over the edge.
Why is my overlocker Unthreading?
One of the most common issues leading to a needle that keeps unthreading is a sewing machine with the wrong thread tension in place. Thread tension at the top that’s either too high or too low can result in this issue.
Why is my serger bunching up?
If the upper looper thread loops are visible on the wrong side, they’re either too loose or the lower looper thread is pulling them too tight. So you can either turn the lower looper tension dial down or turn the upper looper tension dial up.
Why is my overlocker not Overlocking?
Tension should be adjusted properly when sewing with an overlocker. If the stitch is not correct, check for proper threading before turning the tension dial. Even if only one thread has been snagged or has slipped out of a thread guide, it can appear that the tension needs adjusting.
How do you adjust the overlock stitch width?
If the overlock uses two needles, the stitch width can be adjusted by removing one of the needles. This can be done only when a three–thread stitch is used. The stitch length of an overlock machine may vary from 0 to 5 mm (0–0.2 inch). The stitch can be adjusted by turning a dial, moving a lever, or loosening a screw.
What needles for serger?
A serger may take a special needle such as an industrial needle with a flat or round shank. Other sergers may use the standard machine needle sizes 11/75 or 12/80 as well as special needles such as ballpoint, metallic or embroidery.
Why are my Serged seams wavy?
In my experience, the dreaded wavy seam is most often a result of serging more than two layers of fabric together like when attaching cuffs, waistbands, and neckbands. In this tutorial, I’m serging four layers of a thick double knit fabric together.
Why does my lower looper thread keep breaking?
The lower looper thread could be breaking due to the threading of the machine. … – When threading the lower threading lever, make sure the thread is just laid to the side of the lever and not threaded through the lever. 2. Make sure that the thread is not tangled.
Why does my upper looper thread keep breaking?
If the upper looper thread breaks during sewing: This may be caused by the lower looper thread getting caught on the upper looper. If this happens, lower the upperlooper by turning the hand wheel, remove the lower looper thread from the upper looper, and re-thread the upper looper from at least the tension disc.
What causes bird nesting in sewing?
Bird nests occur when thread bunches up underneath the needle plate, causing broken threads, skipped stitches, and uneven tension. This is typically caused by the tension balance being out of whack or the top thread is not threaded correctly.
Should my serger needles be even?
The threads should flow from the needle eyes directly out the back of the serger. The knife is the key to perfectly even seams because it trims extra fabric down to the exact size of the seam. … Solution: If the fabric edge is not to be cut, simply guide the fabric edge next to the cutting knife.