Suppose your 3D printer malfunctions in the middle of a project. After you get it fixed how do you know where to restart the print job? A couple of M.I.T. students claim, as reported in Tech Page One, that they have the problem solved at a cost of less than $100.You simply scan what has been printed and compare it with the model to know where you should restart.
It has a bit of a science fair project feel to it, but I think they do have a good idea. What do you think?