###auto feed system for laser cut, the controller of laser cut is MPC6515
This controller is arduino nano 328p
input is 3 keys:
key1 --- estop
key2 --- config
key3 --- start
output is 4 relays:
relay1 --- power on/off sensor
relay2 --- power on/off feed motor
relay3 --- connect to start cut user interface of laser cut control panel
relay4 --- connect to stop cut user interface of laser cut control panel