Amazon.com: Doesbot A4 Working Area XY Plotter Printer, Handwriting Writer Drawing Robot Kit, Based on 3D Printer Corexy Structure, Assemble Needed, DIY CNC, Support Laser Head : Industrial & Scientific
LY Drawbot, a $70 pen plotter
DIY Homemade Laser Cutter - YouTube
Pen plotter? Laser engraver? This DIY machine gives you both! | Arduino Blog