You're probably aware of this, but Sigma Labs seems preparing a low
cost 3-D metal printer. http://www.ipmd.net/news/002547.html Have a
nice week. Best regards. Salut

Jose Gros-Aymerich Madrid, Spain

Great email


Thank you,

But I worry about arc welding, it too high temperature, easily blow up partial areas, and as parts getting more grow heat distortion get extreme, I think only mild steel can survive at this harsh conditions, and accuracy too low for heat distortion.

I think about new way, heat wire just below melting point and push by nozzle then make it firm, and when wire contact at pre molten surface. I can give pulse controlled spot welding at that point. If so it will have very low blast and can be used for wide area metal, even al 7075. Of course in side 3d printer must be very carefully control temperature.

PBear


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