How to Identify and Fix Common Vacuum Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced Vacuum Technicians :
Serger needle is hitting the lower looper
This problem is caused by the serger needles and/or the lower looper being out of alignment, which then causes them to hit each other. The easiest fix for this problem is to check that your needles are properly positioned in the needle bar.
The most common reason why sergers won`t chain is because they are improperly threaded. You should also check that the needles are not twisted or inserted too low.
The lower looper thread could be breaking due to the threading of the machine. 1. Make sure the unit is threaded correctly. – 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, click here(Opens in a new tab) for instructions.
Loopers (4): A looper is a small lever inside the serger that has a thread hole (similar to a needle) at the end. Rather than penetrating the fabric, the loopers create thread “loops” around the fabric raw edge. Most sergers have an upper and lower looper that move in tandem with the needles to form the seam.
The Upper Looper produces the stitch that lays on the right side, or top of the fabric, and the lower looper provides the stability for the stitch. Together the upper looper and lower looper secure the stitch at the edge of the fabric after it has been trimmed by the blade(s).
– Check to see if your upper tension is too tight. Standard tension setting is 4. – Your thread could be caught on something between the needle and your spool of thread if so, your thread will be too tight for the needle to pick up the bobbin thread. – Make sure that the upper thread is threaded properly.
Looped stitches are usually caused by improper tension. If the loop is on the upper side, it may be corrected by loosening the top tension or by tightening the lower tension. If the loop is on the under side, it is usually best corrected by adjusting the upper tension.
When you pull the needle out of the fabric, hold the needle at the `bottom`, opposite of the pointed end (of course), where the thread is going through the eye. If you hold it there whenever you are pulling the thread taut, the thread will not pull out.
The best sergers can last a long time while offering convenient features, such as color-coded threading guides to prevent thread mix-ups, easy-to-use controls, clear instructions and rolled hemming to produce clean, professional-looking hems.
Lack of tension on the upper thread
However certain you are that the problem with the machine is most likely due to a huge tangled mess of thread in the bobbin underneath the fabric, the most common reason for the jamming is usually the lack of sufficient tension in the upper thread.
A disengaged clutch, broken drive belt or internal drive gear failure can prevent the needle from moving. Engage the hand wheel clutch if you have it disengaged for bobbin winding. If the needle won`t move with the clutch engaged, unplug the sewing machine and check the drive belt.
There are three main types of serger, categorized by the number of threads used for each operation. A 2–4 thread serger makes a two-thread overlocked edge, a 3–4 stitcher uses three or four threads, and a five-thread serger uses three threads for the overlocked edge and two for the seam line.
Top thread tension is controlled by a dial on the machine`s thread path. So make sure the thread sits correctly between the tension discs when you`re threading your machine. If it doesn`t, then the machine won`t be able to sew properly.
If the bobbin thread was incorrectly threaded, the upper thread may be too tight. 3. Reduce the tension by turning the upper tension control dial to a lower number. If the upper thread was incorrectly threaded, the upper thread may be too loose.
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.
Pass the needle through the stitch line where the elastic loop was originally secured, then back through the base of the elastic loop, at least 6-7 times. Don`t pull the thread tight; leave a loop to tie off the thread. Insert your needle through the loops, then pull the thread tight.
Use a double thread or even embroidery floss of 2 or more strands. Using a needle, secure the ends to the fabric and come up through to the right side. Make a starter loop and finger crochet along the thread until the chain is long enough for your corresponding hook. Pull the thread ends through the loop to knot.
Push the tip of the thread through the eye of the needle, and pull it through until there`s a generous tail. To tie a knot, loop the end of the thread around your finger, then roll the loop between your fingers 2 to 3 times. Pinch the rolled thread between your fingers, and pull the thread tightly to finish the knot.
Side cutter foot
A side cutter foot will make your regular sewing machine work as a serger without having to spend hundreds of dollars, so it`s the perfect alternative if you are on a budget or have limited space in your home.
Polyarn is a premium “woollie-like” texturized polyester thread. Polyarn has excellent elasticity, recovery, and flexibility, which makes Polyarn the top choice for garment construction when sewing on a serger. Because Polyarn is 100% polyester, it has a higher heat resistance than woollie nylon threads.
Here is what happens: The cutting knife is a visual guide as to where the fabric needs to run into the serger. Without the knife in place once fabric is moving through the serger, it can easily drift too far into the moving upper and lower loopers.
As dramatic as it may be, jamming is a very common problem for a sewing machine. Your first step toward a remedy is to remove any fabric you were trying to sew. This may require gently tugging at the fabric and lifting it enough that you can snip at the threads and pull the fabric free of the machine.
So what causes a serger needle to break? Some common reasons serger needles break include: using the wrong needles, threading the machine without raising the presser foot, having a loose needle plate, and pulling the fabric through too forcefully.