Another HF 90 Amp Flux Core DCEN Conversion

[bob58o]

But bless your heart, you have a desire to learn, a yearning for knowledge. I have an apple for lunch.

https://www.youtube.com/watch?v=CDuCtU7VqRI

https://www.youtube.com/watch?v=dobDsdFzvfo

 

[ezcome-ezgo]

Don't need the utubes webbery to tell me what it means, y'all.

 

[bob58o]

Not everyone here speaks with a Southern Drawl. Wanted to make sure everyone is getting the full cultural experience.

 

[Randy H]

Say what one more time.

 

[Kentucky Boy]

So you've spent all this time and money upgrading your welder. Wrote up a whole welder mod thread and haven't even posted any pics of its performance after the mods????? How's the thing work now?

 

[bob58o]

Not 100% on the alt bracket yet, so I don't want to do that.

I'll do the exhaust in the morning.
I might just do a series of spots welds instead of trying to run a bead.

I'll look for some scrap to test on, but my welding was terrible before so guessing it is still going to be terrible. Hoping it is only bad now.

 

[bob58o]

I did notice while messing around the first time that I was discharging the capacitor through the gun/wire while positioning for the next weld. Sticking the wire to the work. I might have to ground the wire in-between welds and cut it off near the nozzle.

 

[pRoFiT]

I did notice while messing around the first time that I was discharging the capacitor through the gun/wire while positioning for the next weld. Sticking the wire to the work. I might have to ground the wire in-between welds and cut it off near the nozzle.

sounds like the capacitor is not draining fast enough. holding a charge.

didn't you add a fan or resistor to it?

 

[bob58o]

sounds like the capacitor is not draining fast enough. holding a charge.

didn't you add a fan or resistor to it?

I did. Just a fan. No resistor. I calculated it would take around 30 seconds to drain to 1 volt (IIRC). I guess I should have made it faster. I didn't really think about the functionality. I was just thinking about when tuning the welder off I suppose. I can add a resistor, but was trying to avoid wasting the energy.

The fan probably shuts off at 12V. Then what? It still drains the cap?

For 28V to 1V in 5 seconds would be 15 ohms, 52 watts, 1.86 amps.

 

[bob58o]

Max voltage.
Wire speed 3.
3/16" or 0,5cm thick steel.

 

[Kentucky Boy]

I thought there would be less splatter.

 

[bob58o]

I thought there would be less splatter.

Does the weld look better at the bottom, where it is darker? Is that the way the slag should look? Looks like less spatter there. I dunno.

---------- Post added at 12:50 AM ---------- Previous post was at 12:43 AM ----------

Check out this guy's weld at 6:50
https://www.youtube.com/watch?v=kOWuVj8edR4