Go Down

Topic: AC TIG ALUMINIUM WELDING (Read 12066 times) previous topic - next topic

MarkT

Quote
Yes, I  have read many of them but I want to make it digital with LCD display but I need to change PWM frequency


You probably need to read up about the ATmega328 counter/timers - you only need 3 frequencies, its not clear to me if you need them all at the same time.  There are 3 timer units though so should all be doable.  Very low frequencies may be easy to code directly rather than devote a timer to.

I've a partially written guide to the timers here: http://www.mythic-beasts.com/~markt/ATmega-timers.html which might help.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

JamesLux

http://www3.telus.net/public/a5a26316/TIG_Welder.html

There are a lot of good ideas here, particularly regarding duty cycle and polarity tuning requirements, frequencies, and HV arc starters and how to put together the high current circuits.  Definitely worth a read.
Yes.! Duty cycle is the most important factor of any the best tig welder..

daveygmail

How is the progress on this?

Go Up