Ball & Beam Kit - Part 3

[@careyian]

Getting there slowly but surely! Sneak peak, I should be taking delivery of some PCBs tomorrow! Next video will be all about PCBs!!

[@michaelwirtzfeld7847]

Thank you. This is a perfect entry point for me - I've never acted on building a balance beam despite ongoing thoughts about it.

[@careyian]

That’s great! Glad this helped you!

[@LQThangTD]

Hello, can you tell me the size and mass of the ball you are using in this project, I 3D printed your model and ran it and as a result it did not run correctly with the value I set, I think it's because I used a different ball in this project. Thanks.

[@careyian]

Hi there, the call is a standard sized ping pong or table tennis ball. It should be about 40mm in diameter. The weight is very light, somewhere in the region of about 3 grams.

[@LQThangTD]

​@@careyian Thank you for your help. I have another question: do you use matlab simulink to detect pid parameters or detect pid manually? I tried your code and your 3d model using aruino uno r3 but it doesn't work. Exactly my desired setpoint. Thank you very much

[@LQThangTD]

And why h = ball_postion - 13.5 , where do you get the parameter 13.5 from? I don't understand, please explain

[@careyian]

@@LQThangTDI don’t use Matlab to get the PID gains. I tuned them manually. You will more than likely have to do the same. Part of this project is tuning the weights. I tuned it for my setup with my motors etc. it is not going to be the same for you. Each time this is built it will have to be tuned.

[@careyian]

@@LQThangTDit’s the approximate midpoint of the beam. Since we are measuring from one end, if you subtract half the length of the beam that gives you the offset position as a plus or minus from the centre.

[@laurenvickers8615]

Nice hands 🙌🏻

[@careyian]

Thanks 😅