Older machines have front mounted tension assemblies, while more modern machines have enclosed tensions. Keep it up until you have threaded the needle. File or smooth out these edges if necessary. Frequently, thread fails to slide between the tension discs and simply rides on the out edge. Prevent this problem by lifting the presser foot when you begin threading. The following step by step instructions will insure your threading on most modern sewing machines.
It may by on the back or at the top. The thread must properly slide between the tension discs in order to produce the right amount of tension. Spool pins are sometimes mounted on the back or behind the motor at the base of the machine. Make sure the thread flows freely off the spool and through the guides. Once you have threaded the top of the sewing machine, draw the thread through the tension assembly. This creates resistance. It is essential that you inspect each guide to make sure it is smooth and has not rough edges that might snag the thread. Draw the thread from the spool from right to left through each guide sequentially. At this point, it is not uncommon for even experienced users to mess up.
Some users employ a free standing accessory spool pin placed behind the machine. This reduces or eliminates proper pressure on the thread. Begin by threading the upper thread. The spool of thread is placed on a spool pin which may be horizontally or vertically mounted to the sewing machine. Place the spool over the spool pin on top of the swiss roll production line sewing machine. The spools are made in a variety of shapes and designs, yet they all work alike. Before threading further, look from right to left across the top of the sewing machine. A thread net may be helpful with some threads. Your thread is wrapped around a spool with a hole down its center.
If the pin is horizontal, you will need to use a spool cap to prevent snags. You should see at least one and possibly more thread guides. The raised presser foot keeps the tension discs open, making it easy for the thread to slide into position. Sometimes lint, rust, or rust spots can cause the thread to snag or apply undue resistance. Remove any lint, debris, rust, or rough spots. Also clean out the potato chips production line tension assembly. This is a quick and easy threading method. Tension assemblies consist of two or more spring loaded disc shaped parts that press against the thread as it moves through them. Make sure the thread flows freely