I am thinking about building a micro-tig welder psu, and wonder what sort of controls and features to put on it. I'll be using a microcontroller, so it won't cost much to add another control. Maximum current will be about 30A (this is for small stuff).
I have done some normal-type TIG welding, but not a lot, and no micro-tig.
So, Gas: preflow time postflow time main flow rate - would different flow rates be any use?
HF: on when starting only on when starting and when current should be on but isn't on when starting and when current is or should be on
Current; AC/DC ramp up rate normal value AC duty cycle AC rate
DC Pulse: rate duty cycle background current
AC pulse: rate duty cycle background current pulse share
Displays: main current
Anything I have missed? Anything which would be a useful extra? Is that too little/enough/too much?
-- Peter Fairbrother