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?

 

[Brad93]

11 o clock

to be honest if you set it between 11 and 1 that will probably be about your working range

 

[minimutly]

Looks like it gives you the choice of EP or EN, then the cleaning is reversed for either or. Try where @Brad93 suggests, turn it up until you get a whitish haze. Too much cleaning melts your tungsten...

 

[Brad93]

Yep you'll soon know if you've got too much EP+ as the tungsten will ball up too much.

Usually 25-40% EP+ is about right

 

[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.

 

[Brad93]

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.

i think that knob also doubles as the pulse duration

 

[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.

 

[Brad93]

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.

It will have to be DC pulse. On an inverter that Old it is unlikely to have AC pulse.
also, you couldn't have AC pulse duration and AC balance on the same knob on an analog machine

I would think that the hz knob is for AC frequency if the inverter is European or Chinese then they typically measure pulse frequency in time for pulse on and then background time in percentage. Typically on older machines, it was only the Americans that measure pulse frequency in hertz

 

[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