Help with miller trailblazer 251-NT

[therrera]

Hi all,

can someone tell me if the Trailblazer 251-NT has a built in contactor? I recently purchased one that came with a Miller high frequency box (hf251-d) but I don't hear the contactor kicking in and the tig torch I have connected to the box is hot regardless of how the remote switch on the torch is set to.

I have never welded with this machine and would like to know if someone can tell me what the procedure is. It stick welds just fine. When I put it in TIG mode the torch wants to start but it seems to lack the HF to sustain the arc so it just sparks. I am used to an on and off switch mounted on a tig torch that initiates the arc when the contactor kicks in.

My old unit had a miller hf box like this one but has a contactor built into it. The one that came with the trailblazer does not have a contactor.

Anyone?


Thanks,

Tony

PS: I am going to download the manual for my unit and see what the docs tell me.