I want to constrain ball on the rail
But unlike Inventor, fusion has no tangent joint
So, I draw another sketch to calculate coordinate
and use it in the cylindrical joint.
This process is complex and time consuming.
Is there another way?
Using center distance instead of x y coordinates occur an error.
This project is ongoing now, but won't be available for a little while. Until then, some kind of workaround like yours is necessary.
Hi Mr Leszzag,
A rolling ball on rails is not the most challenging task in F360. The kinematics is quite simple, and it can be simulated using the standard tools on offer. I am sure there is a more sophisticated design challenge behind this example. Still, in this particular case, it should not be too difficult, particularly for … young&bright and even so for the old f##t 😊 to accomplish the task.
Yes, Fusion 360 Ultimate can be improved in joint space … not sure how the universe looks beyond the Ultimate, though. I believe many users are curious and waiting to discover it also.
Please find the template showing how to approach the rolling problem. Mind you, it applies to plain vanilla trivial cases only, so do not even try to adapt it to simulate a rolling of a hard-cooked egg on an undulating surface. You will fail!
Pay attention, how the motion link ML_RevSlide is defined. It is the linchpin of rolling kinematics in F360 in such mundane cases. More universal methods are possible, but they hide in the adjunct universe,…just step across Ultimate. Look also at definitions of user parameters.
Attachments:
BallOnRails_mono.mp4 4K_mono (13 MB) link: https://a360.co/3wqfAsi
BallOnRails_arcd.mp4 4K_stereo (50MB) link: https://a360.co/2Stdr08
BallOnRails.f3d model (1MB) link: https://a360.co/34hYuki
To be viewed on 4K media devices (monitors, UHD TVs, projectors...) of reasonable performance. For the best experience, use stand-alone media applications and the native resolution 3840x2160 – full screen. The stereo file requires an anaglyph red/cyan glasses. Download the files over a network, where the cost of doing so is not a concern. The files are to be used for private, non-commercial purposes only.
Regards
MichaelT
PS.
The behaviour of shading render (both in the model animation and videos) is perplexing and challenging to explain.
