[Brett] from [Theoretically Practical] has done with his old MIG welder, adding premium control features with the help of an Arduino. The main features [Brett] were after is pre-flow, post-flow ...

It runs on an Arduino MEGA 2560 PRO (or similar microcontroller) and supports a wide array of additional hardware including pressure transducer, water level sensor, flow meter, OLED display ...

grbl is stepper motor controller firmware for three-axis cnc machines ... that are too powerful for the normal drivers included on grbl Arduino shields (or integrated Arduino+drivers equivalents), and ...