Talk:MetalicaRap
MetalicaRap Design question feed back / discussion. Add your ideas here!
Design Questions
A. Range of achievable spot sizes at target of a Pierce Electron gun running between 100W to 6KW 150KV ? ( given cathode is 1.6m from target max deflection 7 degrees )
B. Possible pit falls of running an SEM at 100W in four-source photometric stereo Ruderford back scatter mode ? ( typical SEM power is 0.1W )
Q:. Target metal surface temperature measurement would be a big advantage, Do you know of a electron bombardment based remote temperature measurement approach?
A1: ???
A2: The bombarded surface gets red-hot, right? Is it possible to put an infrared camera inside the chamber -- or an off-the-shelf webcam with its infrared filter removed -- and calibrate it using some test objects in the chamber heated to a known temperature?
Q: Some EBW machines put the workpiece outside the chamber, in open air. What materials are useful as a "window" -- to pass the electron beam, but hold the air out of the vacuum chamber?
Q: how will vacuum and powder work, won't that mean some gas will be trapped in the powder and each layer you make some of it will be released and will have to be compensated for?
--Robinmdh 14:03, 18 March 2011 (UTC)
Other ideas.
Q: Printing in air at 1 atmosphere would mess up the metallurgy, but a high vacuum is expensive. What about a low vacuum with a high shield gas percentage?
Robinmdh, all good questions, which I'm interested in knowing the answers to. Since you're a dev, and I'm a dev, and the MetalicaRap team is all devs, want to ask them in reprap-dev? --Sebastien Bailard 09:18, 22 March 2011 (UTC)
