Currently I am trying to build a robotic arm which consists of a base, two links and a gripper with low power servo motors
When I told my guide that I am planning to use PID control and encoder for this he said that the link connected to base will have load of second link , gripper and the object which I am picking(200gm approx.). This would make that lower link unstable and it may even go down because of the load.
I was thinking of using high torque motors but that would increase my power requirements and cost.
My question is that, can this problem occur and if it does, wht can I do to avoid this. I am planning to use 12 V servo.
Maybe you can still using less powerful servos and make some mechanical solutions to your project. Something like mechanical levers are a good solution to potentiate the power of a small servo motor. The picture below is from my biped project (https://www.robotshop.com/letsmakerobots/node/32034), but I think it can hepls you to think about a “lever solution”.
Of course it will have a different look of the robotic arms that we usually see, but will helps to keep low cost.
Sure. Actually the accuracy will depend of your mechanical arrangement. For example, the levers will works like a “reduction”, so you will need to calculate the “reduction ratio”. Have you have already some design of what you planning? If yes, please show us… so I (and other people) can help with some ideas.
