How to make loop de loop marble machine track?

[bizilux]

Hello all, i've tried a few different ways, i've tried googling, i've tried many things, but I just cant seem to figure out how to create a loop for my marbles to roll down...no matter which idea i try, every time i get stuck at the loop because fusion just does these weird rotations where my loop is...

does anyone have a solution? like literally anything that will help me make a loop with a sweep of a sketch... 🙂

[LeonardoBN · Accepted solution]

Hi @bizilux.

Have you tried the Sweep's Twist Angle?

 

[bizilux]

Thank you leonardo 🙂

that twist angle almost never works for me, but yeah it did work in this case because just the loop was its own body.

now i need to tidy it up, add some guard rails, etc... and do a test 3d print 🙂   probably 0% chances that it will work with marbles in the first try lol

[TheCADWhisperer]

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@bizilux wrote:

...probably 0% chances that it will work with marbles in the first try

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If you are a student - you can simulate in Autodesk Inventor - Dynamic Simulation to make sure that it will work...

[bizilux]

sadly not a student anymore... I have a business (startup)  https://outofmarbles.com/

simulations look neat yes, I can't see them working reliably every time though... marbles are chaotic in nature 😛

This is what I'm test 3d printing over the night. The top of the loop is split in the middle and will be printed upside down so that the contact area where the marbles roll will be smooth.

[chrisplyler]

What is this devil sorcery in which marbles can defy gravity?

[bizilux]

I know what you mean... but my "ring of fire" module, for example, works 95% of the times, but there are some instances where marbles fall short or out of the funnel... I don't know if you can replicate that in simulations? also the fact that these are 3d printed parts, which don't have a perfectly smooth surface as they would have in inventor, etc..

https://outofmarbles.com/products/ring-of-fire

For me its easier to just 3d print it and try it out... I'm kind of getting better at designing marble machines as the time goes on, this loop de loop worked in the first try, now im 3d printing another version with a bit higher guard rails and then I will test it on marble machine

[chrisplyler]

You are obviously a witch.