"Don Foreman" wrote in message
...
On Sun, 3 Apr 2005 11:52:27 -0700, "SteveB"
wrote:


Most courses start off with OA (gas) welding. Seems like tinkertoys, but
it
is ALMOST EXACTLY the same as TIG welding in principles, you just use a
different heat source, one being flame and the other being electric arc.
The principles, motions and movememts are identical. Don't be miffed if
they want you to do that first, because you will be able to take it
straight
home and apply it to TIG.

Almost, but one key difference is the footpedal. With gas you can
back the flame away to reduce heat input. If you get in that habit
with gas, you must break it with TIG. With TIG you use the footpedal
and/or move the torch faster but never further from the work.

Well, yes, but when attempting to compare apples with oranges, the writer is
entitled to a little leniency. You must admit that the main point I was
trying to make is a valid one ......... heat it up, get a puddle, add some
filler rod, move on, repeat, repeat, repeat.............

Steve