I am trying the make the tray folded but also I want to make the tray unfolded automatically when the game/ competition started. How do I build it? Do I need motors or make a program for this?
put rubber bands that are trying to fold open the tray. put just the right amount of bands so that you can trigger the deploy easily, but lifting or by intaking your preload.
This is the best option. You could also make it such that intaking cubes triggered the release.
I agree that using rubber bands is a great way of doing extending your tray, however it can be difficult if you have a large tray so be weary.
We have banded our tray, and when I reverse the intakes, the tray will be pushed out causing our tray to fold out and deploy