This is because the old embroidery machines used

the tension on your embroidery punching machine is one of the most important adjustments you will have to keep in check. once you master these techniques, however, you will notice the machine tensions need adjustments almost immediately and will make necessary changes quickly
digitizing your own custom designs can be great fun and a rewarding hobby or a very lucrative business. however, unless you are an artist as well as a digitizer, finding not only good quality clip art but also clipart that is royalty free or copyright free for embroidery dst is one of the first and most important step in the process.
with machine embroidery digitizing, people have access to the delightful, "home-made" decorations that enchant the senses without requiring the owner to spend weeks, or even months, placing each and every stitch.