Hi! I’m am thinking about doing a low hang that’s just going over the bar and then having a small arm come out so the robot can balance, and I’m trying to figure out wear to place the arm. The front of my robot and the back of my robot have a very obvious weight difference, and so the placement of the arm would really matter, and so I want to know how to calculate where the central weight of my robot is. I’m pretty sure there is a method where you lift the robot up from the front and weigh the back, and then lift it from the back and weigh the front. But with these two numbers, what do you do after that, what would you do with those two numbers in order to find the central weight of the robot?
I’m not an engineer, but I would assume that the brain and battery would be the bulk of your weight would be.
Also, I would recommend putting your arm where the bulk of the weight is, and making it as strong as you can. Your lighter end is less likely to tilt forward, and, in theory, a stronger arm would prevent your heavier end from tilting forward, too.
No, most of the weight comes from the air tank if you have pneumatics or simple mechanism distribution.
A simple way to calculate the center of gravity is to take two fingers (optimally your index fingers) and lift each side of your robot. Push your fingers towards the side of your robot which stays on the ground. Do that until you find where it balances.
Also, if it’s heavier in the front, you can put a piece of c-channel that lays against the vertical elevation bar to prevent it from falling forward.
If you intend to balance on the middle bar and hook on to the vertical climb bar for balance you should be thinking about the gap between each of your wheels as this is where the robot will come to a rest when the motors are cut.
You should place the robot with the bar in each of the gaps to see when the robot leans forward but with the least force.
This is the setup you will most likely need to achieve a stable centre bar climb using a side hook.
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