View Full Version : 300DX Aluminum settings
03-01-2006, 09:34 AM
I am taking a begining welding class at the local junior college. We are doing straight stringers on 1/8 aluminum plate (started this week). There are a plethora of tig welders in this large shop to choose from. I snagged the only 300dx but couldnt get it to start an arc. Both instructors tried and failed as well. Near as I can tell, this machine seems to be ignored because no one can get it to work. I have one at home I just bought but havnt hooked up the tig torch yet. Anyway, I was going to reset it to the factory defaults and reprogram it to see if I can get it to run (it would be fine by me if I was the only one who wanted to use It).
Could someone give me some suggestions to set the program for 1/8 Aluminum plate straight stringers and maybe for Tee joint fillets on the same type plate?
03-01-2006, 10:06 AM
i've got one, no prob here. hit the button the far left that says "AC", set the amps to 150, set the gas flow to about 20 psi, set the preflow to 3 and the post flow to 8. use staright argon, make sure you have a good ground, and go to town. one thing you should know- when the thing starts on AC mode it makes a crazy sound, don't freak out, just weld away. if you have any further problem feel free to post exactly what went wrong and i'll try and help.
Don't forget the balance and frequency adjustments. I would start with the balance set at 70-75 and the freq. from 80 to 150. I use around 15cfm setting on argon, and about 12-15seconds of postflow. That should get you in the ball park..
Need a little more information.
First though, what sheilding gas are you using? Dynasty 300's do not like pure helium, helium argon mixes are okay but pure argon especially for beginners is best. If you are running pure helium that is most likely your problem.
I assume you have checked your ground and welding circuit for any opens.
Next make sure the remote is in standard (the top setting) and not 2T mode.
Is the machine trying to start an arc or is it completely dead?
Has anyone tried stick welding with it just to see if you are getting power out?