our robot is facing the obstacle of climbing the pyramid. but it is getting stuck on the bumpers. is it legal if we set up a motor to pivot the bumper up out of the way?
No. Bumpers can not be articulated and must be firmly attached to the frame.
You could put a removable cover over your bumpers that only comes into play while you are climbing. You’d have to be careful to make sure that it falls within the rules though.
How are you climbing… My team is climbing the corner of the pyramid, and we run into a similar problem… So what we did made opening in the front and put two 6" inch wheels to help guide the bot. It really depends on how you are climbing the pyramid.