The Spice Must Flow: a coreXY Sand Table
Build in 'Other Style DrawBot' published by Mark Rehorst, Nov 4, 2018.
A 1.9 x 1 m table that uses a magnet to move a steel ball and draw geometric patterns in sand. The magnet is moved using a corexy mechanism driven by 3D printer controller board reading the patterns in the form of gcode files.