MIG vs. Flux Core Welding

   / MIG vs. Flux Core Welding #51  
Yes, that is what gives the small 110v Migs a bad name that crosses over to larger units. The HF units are the worst. I have been involved in upgrading some HF units with good results, a world of difference.

So as not to hijak this thread, could you PM me the info on how this is done?
 
   / MIG vs. Flux Core Welding #52  
Me too. Or possibly start a new thread on your HF upgrades? Or maybe post here a link to the information you used.

Thanks!
 
   / MIG vs. Flux Core Welding #53  
My two cents on what wire to use: For repair work I really like self shielding for the reliability on a breezy day but like the quicker interpass cleanup of a dualshield type wire; things seem to build-up more quickly with the dualshield as well.

Solid wires are nice for quick/no cleanup and it cuts a lot of work out of making something but there's the relative cleanliness required for it, an issue for repair work, and I don't think I've ever heard of a controlled hydrogen solid wire.

OT for gauthier: We just did root and face bend tests on a 5G weld in 6" SCH 80 as for crap that engineers impose on tradesmen....
 
   / MIG vs. Flux Core Welding #54  
So as not to hijak this thread, could you PM me the info on how this is done?

How-to is a very difficult question to answer without knowing what your working with from the start.

Typically, adding or larger Caps, replacing the cooling fan, larger heat sinks, isolating the wire feed motor from the welding power supply, installing diodes / bridge rectifier if there is none.

This is the link.
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   / MIG vs. Flux Core Welding #56  
Typically, adding or larger Caps, replacing the cooling fan, larger heat sinks, isolating the wire feed motor from the welding power supply, installing diodes / bridge rectifier if there is none.

This is the link.
WeldingWeb - Welding forum for pros and enthusiasts - Powered by vBulletin
I look into the HF forum over there from time to time. I've noticed your posts over there. But out of those hundreds of posts, can you point out a few threads that describe the successful testing and implementation of these upgrades?

So far I'm not convinced that the HF 90 amp flux units are worth putting any money into, but maybe I missed finding the relevant thread. I returned one that was simply unusable, then a couple of years later bought the same model which works acceptably. I think the only difference is the early one came with junk wire.

Thanks!
 
   / MIG vs. Flux Core Welding #57  
Yes, true. It all depends on what is under the covers to start with and what your expatiations are. There is no one answer, its all case by case.

I have replaced the gun and ground cables with larger gauges.

Added 200, 000 uF caps totaling 300,000 uF.

A second cooling fan.

Larger heat sinks with heat sink grease.

More drive to the Solid State relay.

I also prefer Hobart Fabshield Flux Core wire, the slag is a power that brushes off.
0.030, 0.035, 0.045 wire and the same for gas.
With the extra caps the arc is extremely stable, little or no weld spatter with FCW wire almost like spray arc.
Easily puts out 225 amps @ 40% duty cycle. Maxes at 300 Amps.
 

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