Discussion in 'My Shapeways Order Arrived' started by Magic, Nov 15, 2010.

  1. Magic
    Magic Well-Known Member
    Hi all,

    The Ring'n'Roll arrived in Alumide.
    This model is made of two nested rings that have the shape of portions of spheres and that can roll freely one inside the other in any direction.
    It is probably way too big to make it an actual finger ring (too big even for a thumb ring) but it rolls very well and, as expected, it is really addictive :D
    Here are the pictures:

    In order to be sure it worked properly, I printed it in Alumide for cost reasons, but it is actually designed for Stainless Steel (2mm thickness and 0.75mm for clearance between the two rings).

    I will try to add a video as soon as possible.

    A version with holes (less expensive) is also available, but I did no tested it yet.
    Last edited: Nov 20, 2010
  2. Magic
    Magic Well-Known Member
    I added a video about the Ring'n'Roll.
    I hope you will appreciate how well it rolls and even the noise it make...
    Personally, I like the way Alumide catch the light...
  3. Magic
    Magic Well-Known Member
    Unfortunately, I learnt today that this design is not printable in Metal (because it has movable parts). So Alumide is still the best option available, until the technology makes some progress of course... :D
  4. dizingof
    dizingof New Member
    It must make progress!! we can't work like this ! :laughing:

    I think Alumide is really amazing for printing long lasting models!
  5. Magic
    Magic Well-Known Member
    I must say that these times - for metal - I have seen some kind of regression, with models usually accepted being now rejected.
    But I am confident that this is only a transition phase and that in the future there will be more tolerance for metal printing. In the meantime, I will try to be patient...

    And yes, Alumide is a good alternative to metal. I have not enough experience with it to estimate its durability but compared to WSF it seems less porous, heavier, and it is much easier to take pictures of it. Of course it is also less flexible and the wall thickness is 1.5mm instead of 0.7 but it is still less than Stainless Steel with the new restrictions (by default, 3mm is requested).
  6. stop4stuff
    stop4stuff Well-Known Member
    With the current stainless steel Shapeways offers it seems to be that whoever checks the model when the print is ordered has the final say as to whether the model is printable or not... with models I've expected to be rejected, some go through and others pass.

    There is also the software check on upload that will reject any model with a less than 2.5mm bounding box dimension.

    As for the future... Direct Metal Laser Sintering (google hint ;) ) looks good, but from the information I've found, its much more expensive than the Shapeways option.

    A suggestion to make your Ring'n'Roll printable in steel, if you don't mind some post production work... have sprues that join the two parts together (making the model a single part)... not what you intended I know, but a viable workaround.

    Last edited: Dec 30, 2010
  7. Magic
    Magic Well-Known Member
    Adding sprues? 3mm of diameter, I suppose? No thanks.
    I am just a designer: I respect too much Shapeways to do their job.
    I will wait. There are so many other models to design...
    Thanks for the Direct Metal Laser Sintering stuff, and have some nice New Year celebrations!
  8. stop4stuff
    stop4stuff Well-Known Member
    Can't say too much in public, PM sent ;)
  9. Magic
    Magic Well-Known Member
    This is an old model, but I did not have ordered it yet.
    The Ring'n'Roll with holes finally arrived in Polished White Strong and Flexible:


    To be honest, it does not roll as well as the Alumide version: I guess the polishing process adds to much clearance.
    But by playing with the models, I discovered a funny thing: both models are flexible enough to extract the inner ring from the outer one and thus exchange the inner rings between the two models. Here is the result:
    This means that you can mix colors... Interesting...

    Last edited: Aug 31, 2011