From all spot welders that is seen had small screen and no repeatability ... While I wanted repeatability :so load cell is used with arduino and nema 17 motor.
Electronic is based on buck converter and supply for weld is kondenzator (capacitor in english).
Screen is 18cm thow it work on 12.5cm but it is to cluttered.
Details
LCD screen finished . Bugs will be corrected with conjunction with arduino.
Did you intend for the UI to look like something from Star Trek: The Next Generation? Because it does, and it's pretty cool!