SOC Robotics provides a great quality product and the machines found on whatisacnc.com use the boards provided by the company. Check out pictures of the breakout board
So how does a breakout board work anyway?
The breakout board is used to interface between your PC and the various motor controls, relays, and other devices you want to control on a CNC machine. Four boards that interface your computer and your GUI with motors and switches outside of your computer are the Parallel breakout boards, USB breakout boards, Keyboard Emulators, and Motion Control Boards.
Next: How to make one!
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