Any experienced TIG alu-welders out there ?

[Peter Jack]

Me too. It should operate just like an accelerator pedal........ more pedal, more power.

Pete

[Gwillard]

Wow. That's a new one on me.
I don't think I've ever seen a pedal work that way.

[bak189]

The Tig unit pedal that is on the welder in the Netherlands worked like the one Octane has...........it got changed our real fast to a "Normal" one......down for more..........................................................

[Kato Engineering]

I understand that the "cycle rate" of a foreign electrical power in thru the wall socket connections is different. 50 cycles is common in most places other than america.   american power is 60. @ 220 or 208 volts.
 
  about the welder
the newer models produced have a secondary adjustment that you can change the high frequency rate and also the number of cycles that the pulsing of the power occilates.  this action enables the heat effected zone to be slightly narrower and more centered so that it is easier to continue a puddle. the alteration of the cycles of the pulsation also helps to clean the tungsten tip.

on my older hobart and linde units they have no mannor to change this cycle rate

my newer (2003) model miller dynasty inverter unit does.
when this feature is enabled/operational, it makes the machine HUMM with a high pitch sound.

[octane]

I see.
I do believe I have that:



The instructions says:
PULSE FREQUENCY CONTROL
at DC TIG , place DC/PULSE at PULSE,
this switch can adjust the pulse cycle frequency ( o.5-300Hz)

...and someone told me to crank it up like 100-120Hz ( + press PULSE switch )
to get a narrower 'beam'.
So I won't be able to use this welding alu , as it only works in CD mode right ..!? [EDIT: I mean DC ]

[Kato Engineering]

but on MY MACHINE,
 this ONLY operates in A.C. mode.

are you welding aluminum in D.C.


I do not know any details about YOUR machine.

[Kato Engineering]

maybe  your machine, (i.e power supply unit)
has this ability to only occur during "ramp up" or innitial starting of the weld, so that it can make the heat zone narrower and more directed and  thus will not overheat a larger area.
kinda tied into the ability of the power unit to start at a certain percentage of what your maximum power/voltage is...when you innitially depress the pedal.
at least MY UNIT has that option, so that I can in fact have max at example 200 ....and the innitial start power when I first depress the pedal can be as low as 20 percent of the maximum...so that would then be 40 number.
but when it is at the 20 percent number, the power /flame/heated zone will be NARROWER and thus will be also more directed.
this allows the centered /directed heat to not burn off when you are doing inside corners or directed chamfers within a angle.
I am also one of those that have very good results putting a point on the tip of tungsten when doing aluminum...but only pretty much when under about 250 amps.
preheating aluminum to 150/300 degrees helps a lot.

[octane]

Thanks.
Sorry about my late reply.


The thing is that you kind'a lost me there.
I simply need to learn much more about what the hell I'm doing,
 so I will start doing my homework by reading these two books that just arrived
from Amazon.



Hopefully I'll get wiser and able to understand the finers points of welding
to a point where I can actually understand what I'm told by folks trying to help me.