That's really cool. I wish my library had a 3d printer, or they were economical enought that I could justify purchasing one. The biggest obstacle to me experimenting with embedded hardware is the fact that I'd have no case for what I design / build. 3d printing seems to be more niche than 3d printing enthusiasts make it out to be though.
maybe they are economical, but you just seem like a person that has asked for too many handouts and they felt obliged to deny you. try going to the library person next time in a firm, but non-needy attitude