Strange ac balance control

[fizzy]

Well it's strange to me anyway. Esab aristo tig. Putting in some much needed practice. Where should I start with balance on this?

 

[minimutly]

Looks like it gives you the choice of EP or EN, then the cleaning is reversed for either or. Try where @bR39Da suggests, turn it up until you get a whitish haze. Too much cleaning melts your tungsten...

 

[Agroshield]

Just in case you had not already sussed it, the blobs under the dial are meant to represent depth of penetration: shallow and wide on the left and deep and narrow on the right.

I would be interested to hear some explanation of what the numbers (40/20 and 80/80) mean as their relationship with 100 is unclear.

 

[Hood]

i think that knob also doubles as the pulse duration

I agree, if you look at the diagram the ones in grey are for the balance and the ones in white are for pulse, see below, black line is balance, yellow is pulse.

 

[Agroshield]

Thankyou both. That makes sense. The dial is used for both AC and DC.

Maybe we could say (DC) pulse width rather than pulse duration as it ranges from 20% of one cycle to 80% of one cycle. I guess the DC pulse duration proper is set by the Hz dial above it.

 

[Memmeddu]

I have a similar problem with the saf fro 350A Tig at work.
I mostly use 2.4mm tungsten, but whenever some other touches the welder, parameters goes off.
I usually go for 55 to 60% balance, I don't know if positive or negative.
Anyway sometimes I have to reset parameters but it stays locked on 70% even moving the potentiometer and it doesn't weld anything.
It doesn't melt material.
Now I know it's a machine's fault and I'm not pretending someone to tell me how to fix it because I can't as it's not my job, I'd just like to know what numbers mean to understand it better.
The knob has tungsten diameters as reference and the number increases going up with diameters.

 

[minimutly]

I have a similar problem with the saf fro 350A Tig at work.
I mostly use 2.4mm tungsten, but whenever some other touches the welder, parameters goes off.
I usually go for 55 to 60% balance, I don't know if positive or negative.
Anyway sometimes I have to reset parameters but it stays locked on 70% even moving the potentiometer and it doesn't weld anything.
It doesn't melt material.
Now I know it's a machine's fault and I'm not pretending someone to tell me how to fix it because I can't as it's not my job, I'd just like to know what numbers mean to understand it better.
The knob has tungsten diameters as reference and the number increases going up with diameters.

Pictures, pictures...

 

[Memmeddu]

Pictures, pictures...

It's not mine , on Monday I'll try to show you something