Avoid switching thread types on your machine if you can possibly help it. An example would be to use polyester thread in black on one job and rayon thread in black for another job. The machine tensioners actually get used to one type of thread and like a child, it has fits when you make a change in its habits!

It is better to stick to one thread type. Your tension requirement for polyester is much tighter than for rayon and if you are constantly changing thread types; so is your tension and i...
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