FR4 Machine Shield The CNC kit from an entire sheet of
The FR4 Machine Shield is one machine with many possibilities. Like a 3D printer, the head can move side to side, front to back, and up and down. The kit can be assembled to act as a shield, cape or hat to be used with an Arduino, BeagleBone, or Raspberry Pi. So far, we have tested the FR4 as a milling machine, a microscope, and a laser engraver.