There is asking for assistance and there is being used. It is obvious to me that the latter is what is happening here.

Frankly, I would ask this person to kick in a few bucks towards ink and paper. It is okay to point out you just simply can't afford to let them continue to use your copier for free.

In my own case, I had several people that came to rely upon me to give them rides. Well one day, when they all piled in, I said I had to stop at the gas station first. On arrival I turned around and asked them to contribute. Some did so begrudgingly. But two things happened. One person started giving me money now and then and the other two no longer expected a ride.

I suggest you might have to confront your acquaintance to do the same (right) thing.

Whatever your choice is remember that if you are to give them help you ought to do so only on your own terms and at your own discretion.