Robot investment usually ranges from tens of thousands to millions of dollars. It is very important to make the right choice in the first time and avoid common mistakes, because mistakes will lead to unnecessary expenses or task delay. In order to help engineers and designers avoid the most serious mistakes, this paper lists ten mistakes in robot application.
Mistake 1: underestimate the payload and inertia
The most common misconception of robot users is that they underestimate the payload and inertia requirements. It is usually because the weight of the tool installed at the end of the manipulator is not included in the load calculation. Secondly, the reason for this error is that the inertia force caused by eccentric load is underestimated or ignored.
Inertia force may cause overload of robot axis. In robot, overload of rotation axis is very common. If this problem is not corrected, it will also cause damage to the robot. Reducing the load or reducing the speed parameter can stop the compensation for this situation. However, reducing the speed will increase the unnecessary cycle time -- in return for the investment, reducing part of the cycle time is the first in the purchase of robots. This is why load related factors are very important from the beginning.
The effective load is very important. Some information given by the technical parameters of ordinary robots are explained in detail. The rated load is effective only when it is at the rated speed. One of the important conditions for reaching the maximum load is to reduce the running speed of the robot. In addition, excessive load may damage the accuracy of the robot.
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Mistake 2: trying to make robots do too much
Sometimes, the ability and flexibility of the robot make the designer ask it to undertake too much work, which makes the robot unit too complex. Once this result is generated, it is difficult to confirm the correct cycle time, or bring additional difficulties to the disposal scheme, resulting in a lot of difficulties due to the speed limit of the processor. And once the consumption is defective, this kind of error is often amplified. In consumption, unplanned shutdown will lead to huge losses.
Another situation is that the use of robots and work units is beyond the original design ability. When the added work is added after the simulation, it is easy to present a disappointing situation. Especially if there is no new simulation before the plan is advanced, the regular cycle may not be achieved. Therefore, in order to ensure that a cycle of robot is within the regular time, we should pay attention to things beyond the scope of robot talents.
Before using the robot, we must go through the simulation. According to the design requirements, we must confirm the travel load and cycle time of the robot application. Assuming that new applications of the robot are added, we must stop some research before entering.
Mistake 3: underestimate the cable management problem
As simple as it seems, cable management is often overloaded because it seems too simple. However, it is very important to optimize the path to the cable or peripheral equipment of the tool installed at the end of the manipulator for the movement of the robot equipment. Lack of estimation of potential problems will lead to unnecessary actions of robots to avoid cable entanglement and pressure. Moreover, it is assumed that not using dynamic cables or reducing the pressure on cables may lead to damage and shutdown of wires.
At present, the end effector of robot is usually driven by gas or electric appliance, which inevitably has corresponding gas pipe or cable connection. Most of the gas and electrical circuits of industrial robots are outside, so we should pay attention to the control of robot motion; There is also an industrial robot with built-in gas circuit and electrical circuit, which is very convenient. Just think about the cable management when the arm and end effector move relative to each other.
Mistake 4: problems to be considered before choosing robot system
After thinking about each application, when the system is installed, you can be sure that all aspects of the application is what you need, and avoid serious overspending due to possible errors.
In addition to these, there is the robot's working schedule is also one of the problems to be considered. When the stroke is confirmed, we should not only confirm whether the robot can reach the application requirements according to the stroke of the robot's technical parameters. We should theoretically consider whether the robot's trajectory can reach the required stroke after the end effector is installed. This is also one of the key reasons to stop the simulation.
As for the environment, there will be customized industrial robots in different environments. For example, the spraying industry needs industrial robots with explosion-proof ability, which is different from standard robots, and the use of clean rooms. In addition, the reliability of the robot, its defect rate, the power consumption and so on are all in the selection, which must be considered.
Mistake 5: misunderstanding of accuracy and repeatability
An accurate machine is repeatable, but a repeatable machine is not necessarily accurate. Repeatability refers to the robot according to the rules of the way of work, in a given position between accurate reciprocating performance.
Accuracy is expressed by moving to a calculated point precisely according to the working path. In the movement of carrying, the robot moves to some fixed positions through calculation, using the precise performance of the robot. The accuracy is directly related to the mechanical tolerance and the accuracy of the robot arm.
Accuracy has a great relationship with the mechanical accuracy of the robot arm. The higher the accuracy, the higher the speed. The robot reducer is an important key structure to ensure the accuracy of the robot. Ordinary industrial robots all choose RV type standard reducer. Assuming that the demand is applied to some precision manufacturing applications, we can think about choosing the industrial robot of robot ancestor staubliumation.
Mistake 6: the choice of robot system only depends on the advantages and disadvantages of control system
Most robot manufacturers think that the controller of the robot is more likely than the mechanical performance. However, it is assumed that once the robot is configured, the normal operation time mainly depends on the durability of the machine. The loss of consumption ability of products is probably not due to poor controller and electronic equipment, but due to poor mechanical performance.
Generally, the choice of a robot system is based on the user's knowledge of the controller and software. Assuming that robots have excellent mechanical properties in this area, it will be a very competitive advantage. On the contrary, assuming that the robot needs to stop maintenance from time to time after installation, the time-saving advantage brought by knowing control will be quickly consumed.
The mechanical part is the key to ensure the performance of industrial robot. The precision, speed and durability are closely related to the mechanical part. The structure of the robot is relatively simple, which is generally motor and reducer. Assuming that the selected robot often needs to repair the reducer or other mechanical structure, it is very easy.
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Mistake seven: there is no correct robot knowledge
Robot manufacturers and system integrators usually design a robot unit only for an application, but if users do not have the correct knowledge of robot, they may face failure. The use time of any consumer equipment is closely related to how users use and maintain the equipment. It's not uncommon for some first-time users to refuse training. The most important condition for a robot to work normally is to fully understand its ability and make the best use of it in its working range.
Industrial robot is a very special equipment, its operation complexity is no less than a CNC machine tool. Similarly, the use of robots must be familiar with the basic knowledge of the safe operation of industrial robots, otherwise the equipment is very unsafe for people. For the operator using the robot, the system manufacturer must stop the safety operation training of the system before allowing the theoretical operation.
Mistake eight: ignoring the related equipment of robot application
Teaching aids, communication cables and some special software are usually required, but they are easily forgotten in the initial order. These will lead to delays in the whole plan and cost overruns. In order to choose robot products correctly, we must first consider our own comprehensive needs and meet all aspects of equipment selection. There is a very common situation that customers sometimes do not integrate some key equipment and robots together in order to save money.
At the beginning of the project, you must understand the related equipment and software that the project needs to configure. In the purchasing process, we should consider the ordered products according to the application of the project.
Mistake nine: overestimate or underestimate the ability of robot control system
Overestimating the ability of robot control system will lead to repeated investment and unnecessary waste. It is very common to use double backup in safety circuit. It is a common mistake to try to control too many I / O ports and increase the servo system.
Safety control is a very important issue. While thinking about safety, we should optimize the safety logic signal of the application as much as possible, and the repetition in the program is unnecessary.
Mistake 10: not thinking about using robot technology at all
Limited by the scope of investment, people who lack knowledge of robotics and failed attempts to adopt robotics in the past are the reasons why many people stay away from robotics. However, in order to improve the consumption rate and win the final competition in the market, it is very important to get rid of this mistake. Although robot technology can not improve the consumption rate alone, it can help improve the overall consumption efficiency in many cases. Market response time, increased consumption efficiency, simple operation, flexibility, reusability, reliability, precision, flexibility and so on Control ability and long-term application are the powerful reasons for the adoption of robot technology.
Application robot is a long-term investment, easy to manage, but also can ensure the yield of products, improve the consumption rate, and perfect automation application factory, naturally also give customers a stable pillar.
Therefore, with the emergence of the seventh axis of the robot, the application of successful cooperation with the robot will make the robot more flexible and use more space, so it will be sooner or later for the robot to replace the human. This article is from gale


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