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  1. rogueMech

    Curvilinear gear rack and rail

    Yeah, I've contacted schaeffler, NSK, THK, etc, and they don't seem to do this concept as off-the-shelf. I've seen this concept elsewhere, such as in the image below: (http://neurowiki2014.wikidot.com/individual:repetitive-transcranial-magnetic-stimulation-rtms) I like the concept of a...
  2. rogueMech

    Curvilinear gear rack and rail

    Forgot to displace the image:
  3. rogueMech

    Curvilinear gear rack and rail

    I'm working on a prototype that would call for actuated curvilinear motion along an arc. One method I've seen before is to use a curved gear rack and an arc rail (see image). Anyone know any off-the-shelf suppliers of curved gear racks or have a better method in mind...
  4. rogueMech

    Compression in material due to a tapered variable pitch headless screw

    Thanks dhengr & tbuelna. We have already characterized the relative displacement of the two bone pieces, but trying to characterize the compression created between two bone fragments is where we'd like to go. Most papers on the subject simplify the bone structure to two "bone bricks" being...
  5. rogueMech

    Compression in material due to a tapered variable pitch headless screw

    I had a surgeon I work with ask me if I could give him the mechanical details behind how surgical compression screws for bone work (ie http://www.acumed.net/acutrak-2-mini). Now the main features of these types of screws are: - Variable pitch; screw tip has a coarse thread while the head has a...

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