One of the common problems that I see with new sewist’s stitching is thread tension. But adjusting the tension dials is usually not the answer! Often the problem is that the tension disk has been bypassed during the threading process. Oh, the thread was sort of “placed” into the tension area, but it did not truly engage into the tension disk.
My answer? Pretend like you are flossing, and hold the thread between both of your hands when threading the machine. Be sure that you have some resistance on the thread, and that you “snap” it between the tension disks. Push back a little and you will feel the tension disks “grab” the thread. And don’t be a wimp! It is really pretty hard to break your sewing machine. On the other hand, don’t benchpress 250 against your machine 🙂
This tip applies to the tension disks in your sewing machine, your serger, and the tension spring used for winding a bobbin. Snug that thread in there, sistahs!