Threads on a Sewing Machine There's also the thread from the bobbin. It's located at the bottom of the sewing machine. This thread comes up through the needle plate. Thread from the spool goes through the needle's eye.
Push the threader – the small metal tongue will push the thread through the eye of the needle as it passes. You will see some loop behind the needle eye.
Unless you have a chain stitch machine, then you will certainly need your bobbin, even for specialty stitches like embroidery settings or securing a zipper into place. Always consult your manual for the right type, materials, and sometimes brand of the bobbin.
You could be holding the needle thread too tight. Hold the thread lightly to keep the end from going down into the shuttle. The needle could be thread incorrectly. Thread the needle eye from the front to the back.
Check your bobbin area. - Make sure the bobbin is wound evenly and has been inserted into your machine properly. - Check for scratches on the bobbin case. - Make sure that the bobbin thread is pulled completely under the pretension, to assure that the bobbin is wound evenly.
If you imagine the needle thread and bobbin thread as having a tug of war, the stronger one will pull the other one to its side. If the bobbin thread is on top, that means the top thread is pulling more, or, has more tension. That means either the top thread is too tight or the bobbin thread is too loose.
Root: This is the bottom point at which the sides of a thread meet. Crest: The inverse of the root, this is the top point at which a thread's sides meet. Thread Depth: The depth of thread is the distance between the root and the crest as measured perpendicularly to the fastener's axis.
The tension could be too tight or too loose. Set the tension to the basic thread tension setting or adjust the tension manually. The combination of the needle size, thread size and fabric is incorrect. Be sure to use the correct size needle and thread for the type of fabric that you are sewing.
To test if the tension is correct, insert a bobbin in the bobbin case. Then hold it up by just the thread, the bobbin case shouldn't move. Give a little jerk on the thread and if the bobbin case slides down slightly, then the tension if perfect. If it drops freely, then it's too loose.
In conclusion, a loose bottom stitch in sewing projects can be caused by a variety of factors, including incorrect upper thread tension, mis-threaded machines, problems with tension discs, the use of a needle that is too small for the fabric, a damaged or dull needle, and incorrect use of the presser foot.
Machine embroidery bobbin thread is different from regular thread. First of all, It is a lot thinner. Typically, it is either 60 or 90 weight, whereas standard embroidery thread is typically 40 weight. And, a higher weight number means a thinner thread.
If the top thread is not reaching the bobbin, the threads will not lock properly, resulting in a skipped stitch. Re-thread your machine, both top and bobbin threads, and test. If your machine is still skipping stitches, there may be an issue with the timing, which will require expert repairs.