Lorch tig torch A-LTG 1700UD

[pjk]

Howdy!
I am looking for some help with this new to me tig torch-

I cannot figure out how to use the secondary current button.
Tig welder- T220 AC/DC Control pro.
I have the welder set as per factory settings where the button is set to select a secondary current.
In the welder control settings, I can set a secondary current (I2), but while welding I cannot figure out how to access this current. If I select the secondary current befor engaging the arc, the secondary current shows on the parameter display, but welding happens only with the Main current (I1)
The manual also does not really explain the use of this feature.
I would like to have a secondary current to use for aluminum welding so that I can switch to secondary current, when the main current gets the part too hot. Does any one else use the torch in this manner?

Any assistance would be greatly appreciated.

Thanks!
Peter

 

[pjk]

...or is the secondary current only used for setting the background pulse current when in pulse mode?

P.

 

[Robotstar5]

Calling @matt1978

 

[Dutch Welder]

Are youmusing 2t or 4t??
I believe the lower current is only accesible in 4t mode.
Usefull for ali, you set the main current as your starting current, and when the metal heats up you just push the 2nd button to go to the lower preset current.

 

[pjk]

Thanks, Dutch. Matt advised me of the same. Still not ideal for aluminum, but better than just the one switch. I am currently looking for a reasonably priced foot pedal. I hope that will help with heat control on Al.

 

[Munkul]

It's in secondary parameters menu.

Function assignment of the second current torch button 76.
On = normal function (second current)
OFF = no function
fd2 = starts feed for as long as the button is pressed (2-stroke)
fd4 = starts feed with the first activation of the button, stops feed
by activating the button a second time (4-stroke)

I bet its set to either Off or FD4

On my handytig, the secondary current button works in fd2 on either 2 stroke or 4 stroke. And I'm positive the T300 at work is the same.

It's not a super useful button for me... it's definitely nice to have it, but to make proper use of it takes a lot of practice with your fingers. In the end I got a SCC pedal instead, makes small fiddly bits of aluminium a bit easier.