gas valve on tig torch..
#11
Re: gas valve on tig torch..
Another thing to think about is your postflow. If postflow is too low, your tungsten will get contaminated between the time you stop welding and the tungsten cools. Then when you fire the arc back up, the oxidation on the tungsten creates problems. It can smoke and release contaminants, it can cause your arc to wander (due to a disfigured point), and can throw the contaminants down into your weld. For welidng stuff like this, I'd run postflow at about 8 seconds.
WHat happens is that your FLOW meter will regulate FLOW into your torch lead. When you turn off the valve on the torch, the flow into the lead continues, and builds up pressure. When you open the valve, you will get a gush of argon at first, then it will setle back into the flow that you are set to run.
Originally Posted by stillnoturbo
When I open the valve on my torch all the way it just sounds like it's just pouring full blast. Hell that's probably why I was burning holes in the ---- I was trying to lay a bead down with when I first tried and the tungsten would ball up at the end. Leeson learned. No question is a dumb question if you don't ask it.
#13
Re: gas valve on tig torch..
Originally Posted by sohcpwr
yea, when the valve is wide open gas is ------- screaming out of the tip. I dont think it welds too good like that
Ill try opening it up a little more.
Ill try opening it up a little more.
#14
Re: gas valve on tig torch..
why is the valve even adjustable? Shouldnt it just be open/close and the regulator control how much gas comes out?? Makes no sense to me.
One more question.. How are you supposed to stop the arc with a lift arc machine? Since theres no trigger on the handle, the arc keeps going untill i point it away. Is that what i should be doing to break it? (i point it back after that for the postflow)
One more question.. How are you supposed to stop the arc with a lift arc machine? Since theres no trigger on the handle, the arc keeps going untill i point it away. Is that what i should be doing to break it? (i point it back after that for the postflow)
#15
Re: gas valve on tig torch..
I weld on tigs with a remote control but in a pinch I've had to gansta weld it when my pedel croaks. I pretty much just lift the tungsten away from the basemetal until it breaks. I try to break it as slow as possible but yeah it's a pain in the ***. Look up the harbour fright tig pedel mod in teh HT forum. It might be in here too.
#19
Re: gas valve on tig torch..
The correct way to break the arc is to move forward on the weld, without adding filler. Move faster and move farther away as you go. What happens is that the puddle will get narrower. At a point that you will find comfortable, you can just yank it away.
If you go from a full puddle to no arc, you will get what is called a "fisheye"...which can actually create a hole in middle of the crater.
YOu want to trail it off a little slowly. It also makes it such that the black marks are much easier to brush off than just ripping the arc away all of a sudden.
And yes, putting the torch back to it doesn't do much good, but many welders do it. Maybe it's just a "feel good" thing.
If you go from a full puddle to no arc, you will get what is called a "fisheye"...which can actually create a hole in middle of the crater.
YOu want to trail it off a little slowly. It also makes it such that the black marks are much easier to brush off than just ripping the arc away all of a sudden.
And yes, putting the torch back to it doesn't do much good, but many welders do it. Maybe it's just a "feel good" thing.
#20
Re: gas valve on tig torch..
ill experiment with your technique. Sounds easy enough... wonder why i havent tried that yet? I think no matter how far away i hold the torch, it will still make a huge blue arc back to the base metal. Ive gotten like 3" or so away before. Thanks for your help
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12-19-2006 05:25 PM