We're embarking on a new project which requires some aluminum welding. We tried the Dynasty 200 DX on a couple test assemblies with okay results.
On the final assembly we're planning to employ a collapsible wall on the two mating parts - with some filler. The collapsible wall can be up to 1mm wide and 2mm tall to thermally de- couple the weld area from the main parts and assembly, thus reduce amperage requirements and total heat input into the part.
As for the torch we're thinking of using a WeldTec micro torch (Link: http://www.tectorch.com/micro%20tig%20torch.htm)
The question that we're not sure of is what type of TIG welder to purchase. It seems that the 200 DX has plenty of amperage but we're curious if the 350 DX might produce better results on this weld application?
In the Miller marketing documentation the 350 DX adds Precision welding which the 200 DX doesnt have is not rated for. What features in particular does the 350 DX add that might help us? Can the 350 DX produce a smaller arc diameter to better focus the heat on small features (ie our collapsible wall)?What type of unit would you recommend for this application?
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04-17-2013, 04:23 PM #1Junior Member
- Join Date
- Apr 2013
Miller Dynasty 200 DX or 350 DX for Precision Aluminum Welding
04-17-2013, 07:03 PM #2
I see that this torch maximum amperage is 125 for the water cooled version. However, are you welding in such a confined area that you need a "micro" torch? If not then I would suggest a 250 amp water cooled torch, they're more comfortable to use in a production environment, plus you'll get much better gas coverage for aluminum welding
04-17-2013, 11:18 PM #3
I have all three models, and for the smaller welds I prefer my 200. The 350 and the 700 do have adjustable EP, and EN, but honestly I find it only useful for thicker materials. Also 18 program stations which the 200 does not have.
For soda can welding I use the Tri Wave profile, which all 3 have.
If you had to pick one, I would pick the 350DX, but the 200 can do the thin stuff as well as the 350.Nothing welded, Nothing gained
3 ea. Miller Dynasty350DX
ThermalArc 400 GTSW
MillerMatic200 with spoolgun
Linde UCC305 (sold 2011)
PlasmaCam CNC cutter
Fadal Toolroom CNC Mill
SiberHegner CNC Mill
2 ea. Bridgeport
LeBlond 15" Lathe
Haberle 18" Cold Saw
Doringer 14" Cold Saw
6 foot x 12 foot Mojave granite
04-17-2013, 11:19 PM #4Member
- Join Date
- Oct 2012
- yuba city, CA