> Other than by hand, what can you do to trim the margins after printing?

Other than by hand, what can you do to trim the margins after printing?

Posted at: 2014-12-18 
Professional printers support borderless printing.

At work we have an Epson Stylus Pro 3880 and a 7800, both support this.

I'm looking for a way to trim the unwanted areas from posters and the like without doing it by hand with a hand-trimmer. Is there any such way? I'd be doing about 400 a month and it might be worth it to me to not have to cut them all by hand.