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.
rPi Kitchen 