Re-purposing old computer parts is great since it prevents working equipment from finding their way into the landfill. This XY Plotter is a great example of re-use of old equipment.

"This XY plotter was made by the group at Next Window and is the work of Paul Marson and Keith Colson, for the purposes of calibrating touch screens. It uses components that were salvaged from two old Kodak flatbed scanners. Belts, motors, driver boards and the stepper motors themselves are what is used for this machine and gives a resolution of 16 micrometers per step, far better accuracy that what is actually needed."