[BornaE]

What size aluminum is the arm made of?

the arm is bouncy just because of the thickness of that piece mainly.

Also, I am worried that some other robot will run into your arm, and when that happens, my bet is that you will need to remake your arm.

suggestions: It is late in the build season and im not sure how much manufacturing ability you have.

Replace the ARM piece with a piece of 1.5" by 1.5" aluminum square. with 1/8" wall thickness.

balance the arm so without the motor it can stay in the middle position on it's own.

use a more powerful motor such as a cim or 775 motors. gear ratio need to be around 800 to 1 for 775 and about 200 to 1 for the cim.

bring the bearing holding your main arm shaft as close to each other as possible.