why does my bobbin thread keep bunching

Thread bunchingP(also known as birdnesting or thread looping)Pis one of the most annoying sewing machine problems because it is tedious to unpick and tends to happen at the most inconvenient times. If you re trying to figure out why your sewing machine thread is bunching up under your fabric, consider the following problems. Your Feed Dogs Are Down : If your fabric is not feeding through your machine, you will get bunched up thread under your fabric. There is a lever on your sewing machine to disengage the feed dogs for quilting and free sewing, so make sure that your feed dogs are up if you have lowered them recently for other purposes. Your Bobbin Is Put in Backwards : Every sewing machine s bobbin case is a little different some need to have the bobbin inserted clockwise and others need the bobbin inserted counterclockwise. If you are getting thread bunching, check to make sure your bobbin is inserted correctly in your sewing machine. There s usually a diagram right on your machine, but if not you can look in your sewing machine manual. Your Thread Tails Are too Short : If the thread tails coming out of your bobbin and needle are less than two inches long, they may get pulled into your sewing machine when you begin to sew, causing thread bunching. To avoid this problem, you can either hold the thread ends until you have sewn a couple of stitches or always make sure that your thread tails are at least three inches long before you beginPsewing.

Your Upper Thread Is Not Threaded Correctly : When there is thread bunching on the under side of your fabric, it couldPmean your upper thread is not threaded correctly. Rethread your sewing machine to see if it solves your problem. Make sure that your thread goes through the loop that goes up and down as you sew. Your Sewing Machine Tension Is Off : Your upper thread tension may be too loose if you are getting thread bunching under your fabric. Try tightening the upper tension to solve the problem. Only move your tension a little at a time. Your Presser Foot Is Not Down : If you forget to put your presser foot down, your fabric will not feed through your machine as quickly as it is supposed to and cause thread looping or bunching under your fabric. Make sure to always put your presser foot down to avoid this problem. You re Not Using a Spool Cap : Spool caps keep your spool of thread from getting out of control. If you don t use one, you make be letting the spool spin too quickly. So, always use a spool cap, especially if you have a horizontal spool pin to avoid bunching or looping thread.

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Symptom / Cause The thread becomes tangled on the lower side of the fabric. After starting sewing, a rattling noise is made and sewing cannot continue. Looking under the fabric, there is tangled thread in the bobbin case. If the upper thread is incorrectly threaded, the upper thread passed through the fabric cannot be firmly pulled up and the upper thread becomes tangled in the bobbin case, causing a rattling noise. Remedy / Check details Remove the tangled thread, and correct the upper threading according to the following procedure. Turn off the sewing machine. Remove the tangled thread. If it cannot be removed, cut the thread with scissors. If the threads remain in the bobbin case, remove the needle plate cover, and then remove the threads. Remove the upper thread from the machine. Turn on the sewing machine. Raise the presser foot using the presser foot lever. (needle position button) once or twice to raise the needle. Turn off the sewing machine. While holding the spool with your right hand, pull the thread with your left hand, and then pass the thread under the thread guide. Pass the thread under the thread guide cover from the back to the front. Hold the thread with your right hand so that there is no slack in the thread that is pulled out, and then pass the thread under the thread guide cover with your left hand.

Thread the machine by guiding the thread along the path indicated by the number on the machine. Make sure that the thread is passed into the thread take-up lever from the right to the left. Pass the thread behind the needle bar thread guide. The thread can easily be passed behind the needle bar thread guide by holding the thread in your left hand, and pulling the thread into the guide from right to left. Pull the end of the thread, which has been passed through the needle bar thread guide, to the left (A), and then firmly pull it from the front (B) through the slit in the thread guide disk. Make sure that the thread passes the notch of the thread guide. Cut the thread with the thread cutter on the left side of the machine. Lower the presser foot lever. Lower the needle threader lever on the left side of the machine, and then slowly return the lever to its original position. Pull the end of the thread which passed through the eye of the needle. Raise the presser foot lever. Pass the end of the thread through the presser foot, and then pull out about 5 cm (2 inches) of thread toward the rear of the machine.

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