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I had a bad week with the shay project, I broke the cab. I actually knew it was going to break, but I was hoping it would not. There were three areas that I felt were too thin and that they would become a problem, and I was right. I reprinted a new cab and thickened two trouble areas in a way that they would not show. The third area that was a problem I think I solved with some brass "rebar". The fireman's front window comes really close to the boiler, which causes a really thin area one the front wall, and every time I made a cab I broke this area when in installed the cab. Since I was reprinting the cab again I created a groove in the bottom of the wall to accept a 0.012" brass wire. After the cab was printed I rolled a brass wire in set it in the groove then I brushed uncured 3D printer resin in the groove over the wire and placed the cab upside down in the cure oven for a few minutes to seal it in the cab. I believe this should cure the cracking issue.
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That turned out nice. Looks great.
You do know that there will be another toilet paper shortage?
BerndLeave a comment:
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this turned out better than I thought. wrapped the steam delivery pipe with single ply toilet paper to represent the insulation wrap of the prototype.
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Now that was very interesting, and a great way to make weights. Thanks for a great tutorial Jeff.
My question is, not being a printer owner, can molds be made from plastic pieces to make a mold, and use it in the same way to pour in the low melting alloys?Leave a comment:
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Thanks everyone. this week I did some work on making weights for the locomotive using a low temp melting metal
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Your Shay is looking fabulous. I hope the printed drive staffs hold up. I have printed (resin) pilot truck on my engines. They have been doing fine. One for about six months the other about one month.
Bob
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If your hand wasn't in the photo I'd be hard pressed to tell your model from the real thing!Leave a comment:
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