“I have made a different type of design than the normal robotic arms, based on linear actuators.
Robotic arms are used in many applications, ranging from heavy-duty assembly lines and warehouse logistics to precise equipment for fine operations. There are many types of such machinery, based on the application, they can be operated with hydraulics, pneumatics, electrical or mechanical power sources.
About this project
This project is rather a concept in which I combined a side of mechanics (linear actuators) with a simple robot - a robotic arm. This model is far from perfect, but it is a robot that is flexible and can lift weights to 100 grams. Therefore, any improvement of this project is welcome. :)
In this project, I’ve made a unique design of this type of robot, which is based on a form of movement using linear actuators. An actuator transforms circular motion into linear motion. So, the motor is connected to a threaded rod that screws or unscrews a nut. As a result, the nut moves on a linear trajectory alongside the thread.
The advantage of using a threaded rod and nut is that it locks in position when applied force stops. It significantly reduces the stress on the motor, resulting in less energy consumption.
The downside is the need for mobility. During operation, the angle between rod, arm and support varies, meaning that both nut support and motor must be put on joints. Also, the movement is very slow.”