Quote Originally Posted by modela View Post
By the way, I fired up my Maxstar 200 STR yesterday. It is the first time in years that I have used a DC stick welder. It was really smooth and nice. I also used the lift-arc on the unit and welded a little bit with the TIG. Too bad it doesn't have AC. Nice little welder, though.

For those who are more experienced, how do you rate the lift-arc versus the high frequency start? I have been taking a TIG class at a local community college and using a big Miller water cooled tig and so the Maxstar and the older Syncrowave are my only reference. Somehow I keep thinking that I am going to ruin the Tungsten when using the lift arc. Also, the manual doesn't tell much about what amps you use when starting the lift arc.

Jim
"Lift-Arc™ allows the tungsten to be placed in direct contact
with the metal to be welded. As the tungsten is lifted off the
part, the arc is established. This is sometimes referred to as
touch start. Little if any chance of contamination is possible
due to special power source circuitry. When the Lift-Arc switch
is activated, lower power level is supplied to the tungsten
electrode. This low power allows some preheating of the
tungsten when it is in initial contact with the part. Remember
hot tungsten is a good emitter of electrons. This power level
is low enough not to overheat the tungsten or melt the work
thus eliminating the possibility of contamination. Once the
arc is established the power source circuitry switches from
the Lift-Arc mode to the weld power mode and welding can
commence. Figure 2.34 illustrates the proper techniques to
use with the Lift-Arc starting method.
Figure"

http://www.millerwelds.com/education/TIGhandbook/

Chapter II