I did try again. I put a 1inch mark at the top of the pattern page. I made sure the book was lying very flat when it was scanned. I first used regular comp paper. It copied fine. The inch marks matched up. Then I tried vellum ( 25% rag vellum from Office Max). The inch marks did not line up. The vellum copy was a little off. I think the printer doesn't like the vellum.
Thank you Alikat for your offer of help. I can use regular comp paper, but I am going to look into why my computer won't print on the vellum.