[Vwdiesel] Welder?

[Roger Brown]

raymond greeley wrote:
> I felt like you that oxy/acetlyene introduced too much heat and just maybe this was an older method, while still
> used, not as good as current tech.
> I have used mig with fllux core and it was messy and weak.
> I have seen many use mig with co2 gas with good results on metal fencing  and  wondered about the gas
> type as some used argon over co2 and preferred it
> they both produce a sheilded weld so is argon hotter

MIG on steel can use CO2 shielding gas (runs hotter and not quite as clean, but 
inexpensive), or Argon (runs coolest and is most expensive) or a mix of 75% CO2 and 25% 
Argon for a good compromise.  For sheet metal, the trick is not burning through, so you 
need the smallest gauge wire (like 0.020) and some sort of shielding gas, either the mix 
or pure Argon would work the best as they are cooler than pure CO2.  Flux core tends to be 
even hotter than solid wire MIG, I think that is why they use flux core on the lower amp 
units, helps them weld thicker material (plus is is a less complex setup = lower cost 
welder).

-- 

   Roger