Hanging wall plotter

I’m posting another project in my “dreaming” category – Bookmarked things that I’d like to have a go at in future. The hanging wall plotter looks amazing and was featured on the Raspberry Pi blog a while back.

The simplicity of this project is obvious – just two stepper motors and a pen-lift servo. It eliminates the hassle of x-y axis mechanisms and sliders, instead using two thin strings or something like fishing line.

Here, the complexity is hidden within the software. Plenty of trigonometry and Pythagoras at work.

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