Yes, that actually did the trick. I found that on YouTube a couple of months ago and it works excellent. I am guessing I am getting the tungsten contaminated somehow and need to scratch of some of it to get an arc again.
Sure looks very “similar” :laughing:
It is to say the least tricky. I find it very hard to get the arc started below 100A. And since I am trying to weld 2mm thick aluminum that is a bit high. I found that scratching the surface with the electrode makes it easier to get it started but that seems...
I got the brilliant idea to start welding aluminum on my old Telwin Supertig 180 AC/DC. It turns out it is not as easy as it looks (shocker).
It hasn’t got many bells and whistles, no ac balance or fancy frequency settings but it is what I got so I’ll have to go with it.
Does anyone know how to...
I really appreciate your answers :) I find this very interesting and it is fun learning about it.
Like many others I bury down into YouTube looking for good videos about it. Not very much in detail about how arc starters work though. Most videos are about showing the arcs but not so many about...
I should already have understood this by now but admittedly I don’t. Why do I need the coupling coil? The old hf generator didn’t have one but most of the diy projects I have seen have a coupling coil. I surely am missing something obvious here but I am relating to the original hf genny :)
You have a good memory :)
That does indeed sound like mine. It also looks a bit similar. This is how mine looked before I (literally) cooked it:
I just realized I also must have misinterpreted the schematic. I though the 60-70VAC applied when pressing the button only flipped a relay, but since...
You are 100% correct that I need to do more research
This is how the old hf generator looked like. I’ll admit it is not easy to see much but just for reference maybe. It was thoroughly potted and this being the first time for me “depottifying” I managed to botch it pretty good.
This picture...
The tig schematic looks like this and the 60-70VAC (which I will convert to DC to work for this board) activates when I press the button. The “HF GENERATOR” is the component that I am replacing.
But since I guess I should start with getting some kind of spark from it :laughing:
Yep, that sounds reassuring :)
However when I apply 240VAC to what seems to the P3x1 and 24VDC to P2x1 to switch on both relays unfortunately nothing happens. I might be missing something really obvious here but damn if I can see what :laughing:
Yes, the blue component is also a relay, it is switched on the same time as the black relay. They are both switched on by applying 24VDC to the P2x1 connector.
-migmug, I don’t quite understand why I would need hf 320V to drive this. This is supposed to be the hf generator itself ;)
I checked the data sheet on the black relay and realized that the DC should be applied to the P2x1. Did that and it woke up :laughing: Then I got about 6Ohm between the pins on P5x1, none on the P3x1 though.
I a really curious about the P5x1 connector and its attached components. Apart from...
I realized that the picture actually was not showing the lower pins (big mistake). But I went ahead and measured them up. The ones called P5x1 and P3x1 showed no resistance but the one called P2x1 had 400 Ohms.
I also tried hooking up P5x1 to 24V DC but no luck there.
Really appreciate some...
Thank you enormously much for that excellent explanation! I’m really greatful for this :thumbup:
It will probably take me some time to go through it but I’m looking forward to it and I’ll post the result. If I don’t, I was probably clumsy and zapped myself.
Joking aside, it’s “one hand in the...