I have done some tig welding before and recently got the dynasty 200dx, I was wondering if anyod could take a picture of there tig setup how much tungsten stickout and the positioning of their hands. I just want to make sure that I am practicing that right thing. Also does anyone have any tips for fillet welds becasue I am constantly burning holes in thin guage steel fillet welds. Secondly I am have some difficulty welding aluminum because the puddle size gets out of control on me. THe reason he puddle gets so big is because I can't dip the filler metal in the puddle when the puddle is small because I usually end up hitting the tungsten. So to allow me to dip the filler metal into the puddle easier i make the puddle bigger which ends up making a huge mess and the weld doesn't look right.I'm also an amateur TIG welder. I had taken High School welding and some college welding courses many years ago but all my TIG experience is self-taught during my die repair and sheet metal fabricating careers. I purchased a Lincoln TIG 175 for home use because I like working with TIG so much better then the other forms of welding, much cleaner and precise. Maybe these tips will help.
- Always ware gloves and cover all exposed skin. Sounds basic but it's very easy to get in a habit of not using gloves while TIG welding because there are no sparks and very little heat is given off by the arc. But the UV light will burn and it leaches the natural oils from your skin leaving your hands dry, brittle and smelling very strange. I have been told that prolong exposure to intense UV light can damage muscle tissue and tendons.
- Liquid cooled TIG torches can handle more amperage per given electrode size then non-cooled torches but a welding manual will be the best source for correct electrode selection.
- When grinding tungsten electrodes always use the same wheel and try to use a GREEN wheel if possible. Regular carborundom wheels do not hold up to tungsten and leave a rough finish on the electrode.
- Welding aluminum is an art form, at least it is for me. Must use a different gas mix (?% of Helium / Argon). Must keep electrodes for welding alum separate from the ones you use for steel because alum welding is very sensitive to contamination from any source like wire brushes and grinding wheels.
- I found the best way to make a electrode tip for welding aluminum is as follows: lay the electrode flat on a steel table, hit it with a hammer to make a clean flat break, install the electrode in the torch and sticking out of the collet about 1", hold electrode vertical over a piece of metal and start the arc at full amperage until a small ball of molten tungsten form on the end of the electrode and then stop the arc. The small ball end of the electrode seems to work very well when welding aluminum.
- Always use High Frequency Start (HFS) when welding ferrous materials or when machine is set on DC+ or DC-. I forget but I believe 90% of the work performed on steel will have the machine set to DC- so that the arc travels from the electrode to the work piece.
- If you weld on a metal work bench with the ground clamped to one corner you will most likely feel a small electrical shock / tingle from the HFS when starting a arc. Nothing to worry about.
- The last tip to TIG welding is "Keep the electrode out of the puddle"! I'm still learning this one to the day.
mobile welding dallas ga