Engine speed controls explained in Section 6-1.

http://www.millerwelds.com/om/o217454f_mil.pdf

 

Ok I got that but the way im seeing it there is no real use to lock it in idle? Under what circumstances would you use the idle?

sent from my phone so my spelling and grammer most likely suffer more than usual

 

It's more for the RUN position function (notice there's no typical RUN position for the ignition switch) for TIG welding with HF arc starter that requires 115VAC from an auxiliary power outlet but one can do other light welding while locked at the IDLE position as well.

 

Ok so like 3/32 7018's could be run on idle and tiging sheet metal eith out HF

sent from my phone so my spelling and grammer most likely suffer more than usual

 

I actually don't know what your limitations will be so you'll have to give it a try. Arc starting will be a little different as well at the lower OCV the slower idle speed will result in.

 

I maybe mistaken but on all my tb 302's the machine has to run at high rpm to weld or produce power. None of mine are diesel powered so don't know if they are built differently on the power end. If i am using high freq box need to set on run position.

 

To produce proper AC power and TIG with HF yes, but LIGHT welding can be done at the lower idle speed.

 

Not doubting you but that must be very light welding or the diesel drives must be different then the gas drives. I was burning 309l 3/32 at 65 amps yesterday. Had the machine set on run/idle and it would go from idle to run when i was welding. Might be a good reason to run the diesel drive instead of gas. Just always found it hard to justify the extra cost of the diesel.