This type of plotter was quite the "thing" after one appeared at the Maker Faire (I believe in 2010), I already had an EggBot[1] from EMSL and the Eggbot board[2] is set up to control two steppers. Its really easy to use, I wrote a simple Perl library for it and put it on github [3]. The "build" was really just strapping two steppers to the corners of a stand up easel board[4], hang a pen in a disk to hold it perpendicular to the page (I believe we used a 2" hole saw to cut out the "puck" and then drilled a hole in the middle for the pen (friction fit with tape for added friction). Two screw eyes at the 10-o-clock and 2-o-clock positions on the puck, a string to a spindle stuck on the left stepper, and a string to a spindle on the right stepper. Then an all night hacking session and boom, drawing pictures :-). Its really straight forward.
This type of plotter was quite the "thing" after one appeared at the Maker Faire (I believe in 2010), I already had an EggBot[1] from EMSL and the Eggbot board[2] is set up to control two steppers. Its really easy to use, I wrote a simple Perl library for it and put it on github [3]. The "build" was really just strapping two steppers to the corners of a stand up easel board[4], hang a pen in a disk to hold it perpendicular to the page (I believe we used a 2" hole saw to cut out the "puck" and then drilled a hole in the middle for the pen (friction fit with tape for added friction). Two screw eyes at the 10-o-clock and 2-o-clock positions on the puck, a string to a spindle stuck on the left stepper, and a string to a spindle on the right stepper. Then an all night hacking session and boom, drawing pictures :-). Its really straight forward.
[1] http://shop.evilmadscientist.com/productsmenu/766
[2] http://shop.evilmadscientist.com/productsmenu/188
[3] https://github.com/ChuckM/EggBot-Perl
[4]https://www.amazon.com/Post-Self-Stick-Easel-Inches-30-Sheet...