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I have no experience with TIG - would like one for artistic/fine work (future business opportunity),assisting with building woodwork jigs and general repairs/work around the house etc.Initially I was thinking of a chinese welder but nowI've steered towards some used or even new TIGs(Fronius/Kemppi/Lorch/EWM) in the range from 170A - 220A with air cooling.Could someone give me a rough idea what limitationsthe smaller machines (170A-180A) would have in relationto the slightly bigger machines (never used any TIG/havelimited experience with arc welding/ so have little feeling for this) ?
Reply:Small tigs in AC are weak in alum. You really need lots of amps to do alum. A machine in the 170 class will max out at about 1/8" alum. A 200 amp machine will max out at 3/16"-1/4". I have no clue what that converts to in metric.In steel, the DC current will give you more with more amps, but I never tig heavy steel so I couldn't guess at max thicknesses with that. If you use the machine to stick weld, the upper DC will give you some advantages. 180 amps will run 1/8" 7018, and some of the range with 5/16" 7018 IIRC. Some specialty rods, hardfacing, alum and larger sizes of other rods will want more than 180 amps in DC. If you use heavy stick that extra DC may be of use to stick weld..No government ever voluntarily reduces itself in size. Government programs, once launched, never disappear. Actually, a government bureau is the nearest thing to eternal life we'll ever see on this earth! Ronald Reagan
Reply:I have found 180 amps is enough for general tig work. If you are going air cooled its plenty. I can run one length of filler before the torch gets too hot to hang on to. With water cooled its different.If you can run 1/8" stick most of your needs will be covered for the bigger stuff.DavidReal world weldin. When I grow up I want to be a tig weldor. |
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发表于 2021-8-31 23:39:21