| Forum: Post Production Techniques |
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| Topic: Grit blasting |
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| Re: Grit blasting [message #70075 is a reply to message #70006 ] Wed, 19 June 2013 00:38 UTC |
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Perfect! Got a new/old Paasche air eraser on ebay, $40, and a pound of baking soda from the kitchen, it worked great... parts are all clean now (finally).
No love on the small chain, Shapeways refuses to print the small size (wire < 0.6mm).
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| Re: Grit blasting [message #70079 is a reply to message #58513 ] Wed, 19 June 2013 03:02 UTC |
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Welcome to grit blasting!! There are vids on you tube about this process. Interesting stuff.
I don't understand why Shapeways won't go smaller then .6mm. The radars I have have smaller that .6 for sure. Those are the ones's that
the air eraser can blow off the simulated radar array.
I wonder if they changed their file qc processes. I suspect that it could be the file format, .STL vs cad vs whatever. I do know that the IJN parts are done
in a stl file format as Shingo did a screen capture of one of his designs. And it said stl.
I believe the smallest nozzle size .3mm. Maybe the printer is different from your chain and my IJN stuff...
I just checked on one of my screwed up radars and it is definately smaller then .6mm
Bob
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| Re: Grit blasting [message #70081 is a reply to message #58513 ] Wed, 19 June 2013 05:33 UTC |
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Shapeways is getting very tight on the minimum size rule. I had some models that printed fine previously they will not print anymore- back to the CAD program.
I pointed out my "wire" was square and that the area of the cross section was the same as a round wire, but no good. It was a small scale chair leg. So I redesigned my chair with round legs. Now I'll see if some other part of the design fails.
Getting a bit off topic- sorry.
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