What are the important technical parameters for the selection of cooperative robots?
Label: Important technical parameters of cooperative robots, payload, weight, repeatability, safety, easy to use, arm span
Introduction: The light cooperative robot is an industrial robot with a flat touch screen user interface. Users can control the mechanical arm by indicating the actions on the screen.
The light cooperative robot is an industrial robot, which has a touch screen user interface of plane size. The user can control the mechanical arm by indicating the actions on the screen. Or, display the desired motion path by easily holding the mechanical arm. The interface conforms to the standards of most industrial sensors and programmable logic controllers, and it is very simple to write new task programs. Compared with traditional robots, cooperative robots are lighter and highly flexible It is easy to move, and can be reprogrammed to solve new tasks, which can help enterprises adjust and realize more advanced small batch processing and production, so as to meet the challenges of short-term production.
1. Payload
The payload is the weight that the robot can carry. The load of cooperative robots is generally 3-20kg between them. All robots have a specified payload, excluding the weight of terminal actuators (such as clamps) or auxiliary tools. This means that the actual payload that the robot can carry must subtract the weight of the terminal actuator (such as the clamp) from its nominal payload. If the application of the robot is deeply analyzed, and the actual application requirements (such as acceleration) and physical parameters (such as friction coefficient) are considered, it is necessary to appropriately reduce the maximum payload of the robot. Like the general motion control system, in order to improve the dynamic characteristics (acceleration) of the system and reduce the load quality.
2. Weight
The weight of the robot body means whether it can easily move and change the working position, or whether it needs a forklift or a forklift AGV to complete this work. In some workshops, robots need to constantly change jobs to complete various production tasks. If the robot is too heavy, more manpower and working time are required to complete the displacement and fixation of the robot.
3. Repeatability
Many times, people will ask about the accuracy or accuracy of robot actions. But in the world of cooperative robots, this indicator is actually meaningless. In fact, what we need to know is repeatability. Since cooperative robots are usually programmed and planned through manual experimental teaching/manual guidance, the robot can copy and execute exactly the same motion, and its ability to locate x.y.Z coordinate points with millimeter accuracy is more valuable. At present, the maximum repetition value of most cooperative robots is listed in the specification table. Therefore, when we test and use robots, we usually get less repeatability than their nominal values.
4. Safety
Because of the need to integrate with human machine, safety is particularly important for cooperative robots. Although safety is a very complex problem, many robot manufacturers will still calibrate their robot products according to the corresponding safety level, and most of them will obtain the safety certification issued by a third party. At present, the most strict machine safety approval procedure is t? V。 The organization has approved the safety certification of many robots. At the same time, there will be many different variables for robot "safety" certification. The only thing to be explained is that the authentication of robots is safe, which does not mean that the application of robots is safe.
5. Ease of use
Often need to cooperate with others Cooperative robots often switch different operation tasks. The ease of programming configuration directly determines the production and operation efficiency of equipment applications. But this indicator is actually difficult to quantify. Because it is very dependent on people's operation and usage habits. The same interface or usage is easy for some people, but difficult for others. Therefore, this indicator is always subjective.
6. Arm span
The arm span of a robot refers to the maximum (far) distance that the robot wrist can reach. This distance is usually measured from the bottom of the robot. At the same time, there are many methods to measure the span of the robot arm. In most cases, we choose the maximum distance that the robot wrist can reach as a reference. In general, the arm length of a cooperative robot is equal to the length of a human arm.
It is not difficult to see some major differences between cooperative robots and traditional industrial robots from the technical specifications. At the same time, these main technical parameters also determine the different application fields of cooperative robots and industrial robots.
At present, there are at least a dozen famous cooperative robot brands on the market. When selecting the cooperative arm, the parameters of each manufacturer look very similar. Some parameters can be understood literally, while some parameters may deviate from those who have just contacted the cooperative arm. A correct understanding of the parameters of the cooperative arm is an important prerequisite for selecting the cooperative arm that suits your needs.
