this idea is for a portible sign machine.
the idea was to use 6 to 8 rollers that would be chained together and
driven by the x axis stepping motor.(most of the parts could be salvaged from old printers) the board would be held down to the table by 2 rollers. one placed each side of the y axis cutting path. there would be 8 small ajustable wheels to keep it centered and to position the board on the table. i'm not an engineer just a tinker. so it seemed logical to me.it may be complitly unworkable but it is just a wild idea.
(the only dumb question is the one you didn't ask)