preview shapeways different from the drawing in autocad

Discussion in 'Design and Modeling' started by wetronicnl, Jul 29, 2013.

  1. wetronicnl
    wetronicnl New Member

    i noticed that the design i made of an crane tyre for my scale modelcrane. Is different at shapeways then it is in autocad.

    At shapeways it looks the innerside where the rim would go is closed up:


    is there something wrong with mine design? or is this just some kinda preview bug in shapeways?

    i;m asking because i dont want to throw away the model of 70 euro.

    Attached Files:

  2. stonysmith
    stonysmith Well-Known Member Moderator
    If you open the STL in Netfabb Basic and click Repair, you will see this image:

    If you can make out the two yellow circles.. those are holes.
    By default, if you click CloseHoles, then Netfabb will try to close the circle, causing the same problem you see when you upload your model.

    If instead you use the "Add Triangles" function, you can connect the front side edges to the backside edges and seal it up properly.
    My one fear is that doing so may well make the tire solid, therefore much more expensive.

    You should be able to go back into Autocad and do a proper Boolean join of the 3 shells that you have, getting it to upload properly.
    But, also attached is a repaired version.

    Attached Files:

  3. wetronicnl
    wetronicnl New Member
    thanks for the reply,

    it seems there was some kind of very small edge between there. In autocad not noticable.
    I've repaired it by adding a new solid piece in there and rejoin it. So it seems fixed now. Only have to thin it out to save a bit of money.

    well it seems that i can go on, when the drawing is finished and the product is here printed i'll upload an picture here to show what it looks like in real.

    thank you for your help.