I have not brought a sewing machine onboard but I have two friends who have sewn their way from the U.S. to Japan, and another time to Australia. Once on Celebrity, once on Azamara.
It's not actually that uncommon - at least it's not when you talk to people who sew. Pressing is an issue, of course, but that can generally be solved with a spray bottle of water. These friends have sewn quilts and clothes.