cassidym
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| posted on 14/11/04 at 11:26 AM |
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Weld amperage confusion
I'm confused - My Miller Migmatic 171 150 Amp weldor's amp control knob has 6 settings, I assume 25 Amp per setting.
When tacking 1.6mm square tubing, I'm following Mark's suggestion - turning machine to full blast. That works fine.
When fully welding I found that at setting 5 (125 Amp?) I need to move very fast and am more comfortable at setting 4 (100 Amp?). At setting 3 (75
Amp?) I've got doubts whether I get the penetration/fusion that I want.
With my TIG, I set it to 50 Amps and do a solid weld, sometime I even go down to 40.
What can explain this difference. Oh yeah, I'm using CO2 with the MIG so that's even hotter.
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Mark Allanson
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| posted on 14/11/04 at 11:31 AM |
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Its all to do with the amount of material you are melting per second. A 1" pass with a mig takes about 2 seconds, but with the tig you could be
there for 10 secs, so less amps required
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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cassidym
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| posted on 14/11/04 at 03:58 PM |
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That sounds perfectly reasonable.
Thanx Mark
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