Okay, one last project to share. If you are more a start from zero sort of person, see this wonderful set of videos on designing a 3d printable manual knitting machine. Realistically, more of a wonderful educational process you should see, than an economically viable one. (Meaning you can buy used mass produced hardware for cheaper.)
https://www.youtube.com/watch?v=kUKiXIdw2pI&list=PLWDnfcUpk7...