A lightweight cobot is an industrial robot with a flat, small touchscreen user interface that allows the user to control the robotic arm by instructing the movements on the screen. Perhaps, by holding the robotic arm easily, the desired path of movement is displayed. The interface fits the specifications of most industrial sensors and programmable logic manipulators, making it easy to program new tasks. Compared to traditional robots, cobots are lighter, highly flexible, easy to move, and can be programmed from scratch to handle new tasks, allowing companies to adapt to more advanced low-volume production and then meet short-term production challenges.
1. Payload
The payload is the weight that the robot is capable of carrying. The load of cobots is generally between 3-20kg. All robots have a defined payload that does not include the weight of the end effector (e.g., a fixture) or an auxiliary tool. This means that the practical payload that the robot is capable of carrying must subtract the weight of the end effector, such as the fixture, from its nominal payload. If the application of the robot is analyzed in depth, taking into account the practical application requirements (e.g. acceleration) and physical parameters (e.g. coefficient of friction), it is necessary to appropriately reduce the maximum payload of the robot. As with the general motion control system, the load mass is reduced in order to improve the dynamic characteristics (acceleration) of the system.
2. Portions
The weight of the robot's body means whether it can easily move and change the orientation of the job, or whether it needs a forklift or forklift AGV to do the job. In some workshops, robots need to constantly change jobs to complete various production tasks. If the robot is too heavy, more manpower and work time are required to complete the displacement and fixation of the robot.
3. Repetitiveness
Many times, people ask about the accuracy or accuracy of the robot's movements. But in the world of cobots, this goal makes little sense in practice. In fact, what we need to know is repeatability. Since cobots are generally programmed and planned through manual trial teaching/manual guidance, the robot's ability to replicate and execute the exact same movements, and locate the x.y.Z coordinate points with millimeter accuracy is more valuable. Currently, the maximum repetition values for most cobots are listed in the spec sheet. Therefore, when we test and use robots, we generally get less repeatability than their nominal values.
4. Security
Safety is particularly important for cobots due to the need to integrate with humans and machines. While safety is a very complex issue, many robot manufacturers still calibrate their robot products according to the appropriate safety level, and most of them will receive safety certifications issued by third parties. At present, the most stringent machine safety approval process is t? V。 The organization has agreed to safety certifications for many robots. Together, there are many different variables in the "safe" certification of robots. The only need to explain is that the certification of the robot is secure, which does not mean that the operation of the robot is secure.
5. Ease of use
There is often a need to collaborate with people. Collaborative robots often switch between different operating tasks, and the ease of use of programming equipment directly determines the output and operating power of the equipment. But this goal is difficult to quantify in practice. Because it is very dependent on people's habits of operation and application. The same interface or approach is easy for some, but difficult for others. Therefore, this goal is always one-sided.
6. Reach
The reach of a robot refers to the maximum (far) distance that the robot's wrist can reach. This interval is usually measured from the bottom of the robot. Together, there are many ways to measure the span of a robot arm. In most cases, we choose the maximum interval that the robot's wrist can reach as a reference. In general, the arm length of a cobot is equal to the length of a human arm.
From the technical specifications, it is not difficult to see some of the top differences between cobots and traditional industrial robots. Together, these primary technical parameters also determine the different fields of application of collaborative robots and industrial robots.
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