Moving Pulley and Rope Simulation in Assembly

RWLee

Hi,

I am trying to create a moving pulley system like this: https://fermliving.com/products/lod-pendant-cashmere

People can adjust the height of the pendant lamp, and the ball will silde freely along the string. There are small friction forces between the string, the tube and the ball. By these forces they create a balance that the lamp stays in new height.

I am not trying to simulate the frictions forces and the weight balance (A little to compilcated for me now), just wanted to learn how to animate the movement like this.
Searched in the community, but found few related info. I wonder if there is new method or new feature script for this.

I am new to learn CAD and simulation. Any hint would be inspiring. Thanks.

I made this (only shapes), if it helps.
https://cad.onshape.com/documents/5c84bb5804cb345719a5d101/w/d10b0268902126089b8b3fdc/e/4a59200647d3f6c090ee92da

MichaelPascoe

You could simply add a Linear relation to the Slider mate that would be attached to each end of the pully system. One would be attached to the object being pulled and the other would be attached to some free "rope" at the other end of the system. Right click on the slider mate then select the animate option. This will not animate chain segments, but would animate the ends. It would be possible to have the "rope" overlap at the ends so that it appears to be pulling or releasing the rope.

Alternatively, if you do want to see individual "chain" segments, you can use the push technique that @NeilCooke came up with:
https://forum.onshape.com/discussion/comment/116463#Comment_116463…

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