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Well, if you have decided to build yourself a polargraph, this is your instructable! A polargraph is a computer controlled drawing machine. Motors are fastened on the two upper corners of the drawing surface. They are equipped with gear pulleys. These pulleys run two lengths of cogged belts. These belts are attached in the center to a gondola. The gondola carries the drawing instrument, a pen or a marker. Also on the gondola is a little servo that lifts and drops the pen on demand. The software converts images to files written in G code. Then the Drawbot uses this code to plot start and stop lines on a canvas of your size.”

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