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Rope and Pulley setup in Onshape?

david_hall586david_hall586 Member Posts: 4
edited March 2017 in Community Support
Hello. I am wanting to construct and simulate a home exercise cable machine in onshape. Obviously this uses pulleys and ropes/cables. Is there any way to achieve this in Onshape? Thanks.


  • 3dcad3dcad Member, OS Professional, Mentor Posts: 2,440 PRO
    You can construct ropes&pulleys but we don't have flexible materials so simulating movement would be tricky.
  • david_hall586david_hall586 Member Posts: 4
    Thank you. It seems insane to me. It seems even Inventor and Solidworks also pretty much lack this. So apparently with all the cad work done, people can't even simulate simple pulley/rope systems.
  • TimRiceTimRice Member, Moderator, Onshape Employees Posts: 255
    Though you cannot simulate the movement of the rope, you could use both named positions and incontext editing to create approximations of the system. For example, for a pulley system with a spring tensioner you could create 3 named positions in the assembly, min, max, and neutral. This would then allow you to use the belt FS in context to calculate the length of the belt at the extremes of the system as well as at rest. Either way, feel free to make the doc public and share a link here and several members of the community are likely to offer their guidance!

    Belt FS: https://cad.onshape.com/documents/57886eace4b0e425c1ef548a/w/54f180f432defb41a8fddb17/e/c65e445e89ee373617edc394
    Tim Rice | User Experience | Support 
    Onshape, Inc.
  • viva_shawnpotterviva_shawnpotter Member Posts: 1
    Can you make a rope-like object out of the spline?
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