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Tambour front box (aka roller door)

connor_macmurrayconnor_macmurray Member Posts: 9 EDU
edited May 14 in Community Support
I am attempting to make a tambour front box, like a bread box, only smaller and with a bottom drawer that the roller door section connects to. When you pull out the drawer, the roller door opens, when you close the drawer, the roller door closes.
The tambour/roller door is made up in real life from timber slats 6mm thick, 10mm wide and 220mm long. They run in a groove that is 6.5mm wide and are connected together by laying them out flat and gluing canvas to the underside which provides the articulation. In order to replicate this in Onshape I made a revolute mate between the lower edges that touched therefore allowing the tambour to in theory bend around the groove in the sides.
In real life the tambour is inserted into the grrove at the bottom and fed up and around. Then the tail end is screwed into the bottom of the drawer which means when the drawer is opened it then gets pulled along the groove underneath and therefore retracts the tambour on top.
Here is the view from the other side 
Also, the reason why it looks so funny is that I tried to move them upward in one go but the middle two decided not to move and so the others flexed accordingly showing the revolute mate obviously works.
I have only been using Onshape for a day, but have used other CAD packages before, but this is killing me. I've tried pin and slot, which I now know is the wrong thing, and tangent but it doesn't seem to want to work either.
Any help with this would be greatly appreciated.

Connor

Best Answer

  • john_mcclaryjohn_mcclary Posts: 1,914 PRO
    Accepted Answer
    When making paths with tangent mates and slots, it is sometimes best to thicken one wall of the slot and use it as a mate surface.
    otherwise the tangent path will attempt to wrap around the radius at the end of the slot and travel up the back side of the slot.

    from there add a tangent mate to the leading corner of each part to the highlighted face i show here.



    then you can hid your path part and all should be well


Answers

  • homebrewdesignhomebrewdesign Member Posts: 7
    Is your document public? Can you share the link?
  • connor_macmurrayconnor_macmurray Member Posts: 9 EDU
    It is public but not sure how to share the link yet, give me a second
  • john_mcclaryjohn_mcclary Member, Developers Posts: 1,914 PRO
    Accepted Answer
    When making paths with tangent mates and slots, it is sometimes best to thicken one wall of the slot and use it as a mate surface.
    otherwise the tangent path will attempt to wrap around the radius at the end of the slot and travel up the back side of the slot.

    from there add a tangent mate to the leading corner of each part to the highlighted face i show here.



    then you can hid your path part and all should be well


  • john_mcclaryjohn_mcclary Member, Developers Posts: 1,914 PRO
    Note: you may find it difficult to move the drawer manually, there is a lot of calculation happening with all the tangent mates, I had to use the animate feature in order to force it to move.
  • connor_macmurrayconnor_macmurray Member Posts: 9 EDU
    Thank you so much for this, I'm fixing it right now.
  • john_mcclaryjohn_mcclary Member, Developers Posts: 1,914 PRO
    https://cad.onshape.com/documents/ab9102f85e1dfa24f3362393/w/64d68715dbef366c064f2562/e/68a1fea643304070d5328edf

    No problem, welcome to Onshape and the forum by the way :)
    above is a link to my version for reference.
    Let us know if you have any more questions
  • connor_macmurrayconnor_macmurray Member Posts: 9 EDU
    Thanks John, I've had a look at your version and I'm just wondering what the planar mate does between the shelf and the leading edge of the tambour section?
    When I finally got it working, animating it was the only option too, when I tried doing it manually, the sections of the tambour did odd things!
    But thanks again it was really helpful.
  • john_mcclaryjohn_mcclary Member, Developers Posts: 1,914 PRO
    The planar mate is connecting the tambour to the back of the drawer.

    The parts are offset so I used planar so I didn't over constrain
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