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How to run a car on a Figure-of-8 track?

yip_cmyip_cm Member Posts: 12

Here is my sketch:

https://cad.onshape.com/documents/3fd14ef30a845668d58cd449/w/76f214f58f9b71f97c7e4279/e/e3fb14813f9942dc4709cc68

Comments

  • jelte_steur814jelte_steur814 Member Posts: 485 PRO

    In this copy, i got the cart to go and stay flat on the whole figure-of-8. it is also related to the carts going around the circle track, but they turn around when the second loop of the 8 is started and therefore the animate of the revolute isn't working yet.

    my time is up so good luck figuring that out. it's getting close though!

    I thought of a gear relation, to a planar mate on the vertical cart guider, but that doesn't work somehow.

    I added a composite curve that approximates your helix/bridge curves to improve on the tangency to get it all to work. the bridge curves where just tangent, but the swept edge on the other side of the top face was insufficiently tangent to allow tangent mate 5 to go all around…

    https://cad.onshape.com/documents/1223ff208772fc036fab1e68/w/e3191746f4dc9f2f2ab49eb1/e/6fce9a1c35ab8088686496bd?renderMode=0&uiState=684a86155854d0479d6aeca1

  • yip_cmyip_cm Member Posts: 12

    Problem solved, thanks for your comments and idea.

    https://cad.onshape.com/documents/3fd14ef30a845668d58cd449/w/76f214f58f9b71f97c7e4279/e/e3fb14813f9942dc4709cc68

    Have a nice day! \{^_^}/

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