It seems fairly easy. Put the spool on the spool pin and thread the machine. This simple task, however, may be the source of thread issues if you have not first noticed how the thread is wrapped on the spool.
How Thread Is Wound On The Spool
You have probably noticed that thread is wound differently with some thread wrapped around the spool in parallel winds (stack wound) while on other spools or cones the thread is cross wound creating the “x” signature. How the thread comes off the spool or cone does make a difference in how it sews. In fact, some thread may actually kink up or twist as it unwinds.
Position the Spool/Cone Properly
Spools with thread that is stack wound or parallel wound should be positioned so that the thread will unwind straight from the side of the spool. On your home sewing machine the spool should be placed on a vertical spool pin so that the thread can unwind off the side of the spool as the spool rotates. For cones or spools where the thread is cross wound, the thread should come off the top of the cone/spool rather than the side. On a home sewing machine, these small cones or spools would be placed on a horizontal spool pin where the thread pulls off the top of the small cone/spool.
Longarm quilting machines typically use cross wound thread on large cones which unwind from the top of the cone when sewing. The cone holders are vertical pins near the back of the machine where the thread unwinds up off the top of the cone and up through a thread guide above the cone as the machine is threaded. Sometimes Longarm quilters want to use specialty, decorative threads that are usually used on a home sewing machine. Often these threads are stack wound (parallel wound). To use these threads successfully on a longarm, a horizontal spool pin must be used to prevent these threads from twisting and knotting. Additionally, because a Longarm machine stitches so much faster than a home sewing machine, the twisting and knotting can be very frustrating with many stops and starts to try and remedy this situation. Horizontal spool pin adapters are available and may be made of plastic or metal. Some of these adapters screw into the machine and others clamp onto the existing spool/cone pin.
The video below from Superior Threads below illustrates the two different types of thread wrap as well as how to use the Superior Threads thread stand for use with either type of wound thread. I have one of these stands and use it at my home sewing machine when using the large cones of thread I might use at my Longarm. These cones, of course, are too large to mount on my horizontal spool pin in the top of my Janome Horizon. Other times I might use a decorative stack (parallel) wrapped metallic thread. These threads are known to have kinking and twisting problems. The only way to successfully use these threads is with a side delivery method. The Superior Threads thread stand can be set up for this use, too.
Another spool pin adapter system is called “Specialty Thread Spool Pin Adapter,” www.thethreaddirector.com. This has a sturdy post adapter with a spool pin that is perpendicular to the post adapter. Depending on which way you attach it to a vertical or horizontal post it can be used for either stack (parallel) wrapped or cross wrapped thread.
Although you might “get by” positioning a spool incorrectly, using the correct thread delivery method for the cone or spool allows more successful stitching. While a stitching issue might look like a tension issue, it may really be caused by how the thread is coming off the cone or spool. Remember, when thread is manufactured, parallel wrapping goes on from the side and must come off of the side. Cross wrapped goes onto the cone from the top and must come off of the top.