Настольный ЧПУ станок Моделист3040-4х | Инструменты ...
This instructable describes an A4/A3 plotter made from a section of plastic pipe, two BYJ-48 stepper motors and an SG-90 servo. Essentially it is a flat-bed plotter rolled up into a drum.One motor rotates the drum while the other moves the print-head.