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  1. martin05

    ABS or 30% Glass Filled Nylon feature size

    OK, so I guess that the best option I may have is to do a test part that Protomold can handle and run it that way. The "how it feels" part of things is hard to calculate or simulate.
  2. martin05

    ABS or 30% Glass Filled Nylon feature size

    Thanks for the clarification on the design calculation methodology. It's far too easy to fire-up FEA. I've learn to be very careful about the results. I use it mainly for thermal management simulation where it can be useful. I'll go the spreadsheet route and see what kind of trouble I can...
  3. martin05

    ABS or 30% Glass Filled Nylon feature size

    This is interesting: http://upload.wikimedia.org/wikipedia/commons/thumb/6/67/ZipTieCrossSection.JPG/1280px-ZipTieCrossSection.JPG
  4. martin05

    ABS or 30% Glass Filled Nylon feature size

    Thanks for your feedback. I'll look into acetal. Again, the model I uploaded is one in a series of thinking tools, if you will, that I am quickly throwing together in Solidworks to eventually converge on geometry that will be integrated into an actual design starting from a fresh clean file...
  5. martin05

    ABS or 30% Glass Filled Nylon feature size

    Yes. I did see the fact that the tooth closes to the hinge will work harder. I just wanted to mock something up quickly in order to get a sense of proportions and where things can be fitted. I'm tempted to try for a topology that might make motion a little more parallel rather than heavily...
  6. martin05

    ABS or 30% Glass Filled Nylon feature size

    Pud, 0.05 x 0.05 is trivial, how much smaller can I get if I went with ABS? How about unfilled nylon? I would love to see the steps in this ratchet be smaller. I think I'd be happy if I could achieve 0.025in steps. I guess that part of the problem there is that you have to make absolutely...
  7. martin05

    ABS or 30% Glass Filled Nylon feature size

    Thanks for all the input so far. I've attached a few screen shots of a mock-up in order to clarify the question further. For reference, the green part is about 2.5 by 2.9 inches. You can see the proposed engagement of the teeth on the back of the green cover plate with those on the locking...
  8. martin05

    ABS or 30% Glass Filled Nylon feature size

    I'm working on a design that requires a ratcheting mechanism to be molded into the parts. Two parts slide with respect to each other. Each of the parts would have triangular teeth molded on facing surfaces. The parts would click one step at a time as they are slid with respect to each other...
  9. martin05

    Bohemite and Bayerite formation rate

    Looking into improving bond quality of AL to AL for a heatsink application. Fins would be bonded using AL filled epoxy. The problem, as I've been told, is that bohemite/bayerite formation causes a bond that is not reliable from both a mechanical and thermal perspective. One possible...

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