I've been lurking for awhile and decide to join. First I would like hi to everybody.
Here is my problem with my first Tig machine, a Maxstar 150 STL.
Please look at these pictures first.


This was done on a ss pipe, the weld in the bottom picture had 308ss filler, clean 3/32 tungsten, very clean work piece, no spatter at all, nice arc at 60amps ad 15+ cfm.
The problem is the weld do not come out shiny like the should. They were all covered with these black stuffs no matter what kinda of adjustments I did. I even went and put Teflon on all of the gas connection. I was told it could be contaminated or wrong gas, i went and got a new cylinder and the problem reamain! Does anybody else have any idea?
Here is my problem with my first Tig machine, a Maxstar 150 STL.
Please look at these pictures first.


This was done on a ss pipe, the weld in the bottom picture had 308ss filler, clean 3/32 tungsten, very clean work piece, no spatter at all, nice arc at 60amps ad 15+ cfm.
The problem is the weld do not come out shiny like the should. They were all covered with these black stuffs no matter what kinda of adjustments I did. I even went and put Teflon on all of the gas connection. I was told it could be contaminated or wrong gas, i went and got a new cylinder and the problem reamain! Does anybody else have any idea?
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