A maker who wanted a machine to draw on his wall built a large plotter called Mural that uses a moving carriage with stepper motors and a servo to lift a pen for drawing.
It can recreate vector graphics accurately, using washable Crayola markers to allow repeated decorations.
Such a machine could be used for a CNC router, plasma cutter or oxyacetylene torch, but it would need to be protected from molten metal splashes or sparks.
This style of drawing robot was originally developed in 2002 and has previously been posted about on Hackaday in 2005.
Other decorative wall-drawing machines have also been featured on Hackaday.
