Introduction
Sewing machines can be subject to many issues, from jammed bobbins, to unnecessary noise and overall general issues. But one of the most frequent problems that can occur is a loose bottom stitch. When occurring, the stitch produced by the sewing machine ends up loose on fabric, with the loops being too big and the thread being wider than expected. One of the reasons why this happens is because the bobbin tension is not properly set. But there are also many other factors that can contribute to a loose bottom stitch, such as the wrong needle size, the wrong thread, or an even a damaged needle plate.
Boosting Bobbin Tension
Bobbin tension must be set in order to sew properly. To do so, the process is rather simple. First, you need to place the bobbin on the bobbin case and slide it until it goes in place. Then, if you have a special bobbin case, one that includes a place to put adjustment screws, you can make sure it is placed correctly with the adjustment screws facing up. On the other hand, if your bobbin case does not have this feature, then your sewing machine most likely comes with a bobbin tension gauge. Put it in place and make sure the bobbin case is in the correct spot. Once this is done, turn the bobbin tension clockwise to increase the tension, or counterclockwise to decrease the tension. You will want to pull on the thread to see how much tension is placed on it. If the tension feels too loose, then you might need to tighten it a bit more.
Picking the Right Needle Size
Another factor that can have an adverse effect on the bottom stitches of your sewing machine is the size of the needle you are using. Needle sizes are normally indicated by a number, which generally ranges from 60 to 110. As a rule of thumb, it is recommended to use the smallest needle for your particular fabric. Failing to do so can result in stitches that are too loose or can even cause the seams to come apart. Before purchasing or changing needles, it is also important to make sure that the needle and the thread you are using are compatible.
Checking for Damaged Areas
Sometimes, the problem does not lie in the bobbin tension or needle size, but instead it is an issue with the sewing machine itself. One of the things to look out for is a damaged needle plate. The needle plate is the flat surface underneath the needle. It can easily become damaged and can cause a lot of grief if not taken care of. If the needle plate is damaged, it can cause poor thread tension and may even result in a loose bottom stitch.
Choosing the Right Thread
When dealing with a loose bottom stitch, it is always a good idea to think about the type of thread you are using. Not all threads are created equal, and some may be too thick or too thin for the type of fabric you are working with. Often, a thicker thread will cause a looser stitch, and this will inevitably lead to a weaker fabric. Conversely, using a thread that is too thin can lead to the same issues. It is therefore important to get the perfect thread for the type of project you are working on.
Understanding Different Types of Machine Threads
When picking the right thread for your fabric, it is important to consider the type of thread you want to use. Different types of threads, such as polyester, cotton, silk and rayon all have their own unique properties and should be chosen accordingly. Polyester is the most common type and is an extremely versatile thread that is both strong and durable. Cotton is also popular due to its breathability, while silk is known for its strength and has a very smooth finish. Rayon is considered to be the strongest thread of all, but it comes with the added cost of being difficult to sew with.
Caring for the Machine
Apart from making sure all the necessary parts are in good condition, caring for your sewing machine is also important and can help to prolong its life. This includes regular cleaning and maintenance, such as checking for loose parts or making sure the bobbin is properly wound. Additionally, it is a good idea to oil the machine as per the manufacturer’s instructions. Doing so will help to keep the moving parts lubricated and will keep the machine functioning properly for a longer period of time.
Conclusion
A loose bottom stitch on a sewing machine can be extremely frustrating, and can often lead to damaged fabric. However, there are several measures which you can take to help solve the problem. From tightening the bobbin tension, to picking the right needle size and thread, all of these are important steps that can help contribute to a successful sewing project. Taking care of your sewing machine and keeping it in good condition can also help to make sure all parts work correctly. With the right amount of care and attention, you can say goodbye to those pesky loose bottom stitches, and get back to sewing the projects you love.
