Introduction to the misunderstanding of robot application - Epson robot

Myth 1: Underestimating useful load and inertia

The number one misconception of robot users in the application is that they underestimate the need for useful load and inertia. Usually this is due to the fact that the weight of the tool at the end of the robot arm is not included in the calculation of the load. Secondly, the reason for this error is to underestimate or perhaps completely ignore the inertial force of eccentric loads. Inertial forces may cause overload of the robot axis. In SCARA robots, overloading of the axis of rotation is common. Failure to correct this problem can also cause damage to the robot. Reducing the load or perhaps reducing the speed parameter can compensate for this. However, reducing the velocity will add unnecessary cycle moments – cycles as part of the ROI reduction are at the top of the list when it comes to buying robots. That's why load-related factors are important from the start.

Myth 2: Trying to get a robot to do too many things

Sometimes, the robot's talent and flexibility lead the planner to take on too much work to the point where the robot cell is too cluttered. Once this happens, it is difficult to determine the correct cycle time, which can cause nominal difficulties for the solution, or even a lot of difficulties due to processor speed limitations. And when production fails, this error is often magnified. In production, the shutdown of non-program products will lead to huge losses.

Another situation is that robots and work cells are used beyond the original planning requirements. When a job is added after a simulation, it's easy to get disappointed. In particular, if a new simulation is not done before the solution is promoted, the regular cycle time may not be met. Therefore, in order to ensure that the cycle of the robot is within the regular time, then things that exceed the scale of the robot's ability must be very careful.

Introduction to the misunderstanding of robot application - Epson robot

Introduction to the misunderstanding of robot application - Epson robot

Myth 3: Ignoring the handling of cables

As simple as it may seem, or perhaps because it seems too simplistic, the cable handling is often overloaded. However, the optimization of the cable or peripheral equipment to the tool at the end of the robot arm is important for the movement of the robotic equipment. Lack of an estimate of potential problems will result in unnecessary maneuvers by the robot to prevent cable entanglement and compression. In addition, if dynamic cables are not used, the pressure on the cables may be reduced, which may lead to damage to the wires and downtime.

Myth 4: Problems that should be considered before choosing a robot system

After considering each application, when the system is installed, you will be able to confirm that all aspects of the application are what you need and prevent serious overruns due to possible errors. The elements to consider are:

Load – taking into account the useful load, direction and moment;

Orientation - consider the plane of movement, the possible obstacles and lubrication in the plane of movement, and the various effects of protection;

Speed – consider speed, acceleration, deceleration, and the inertia with which they occur;

Travel - take into account the distance traveled, the correction, the interval between lubrication and the sudden movement of the universal ball screw;

Environment – Consideration of ambient temperature, cleanliness, and the presence of corrosives;

DutyCycle – Consideration of whether or not the time ratio of the time and the thermal effect of the part.

Myth 5: Misunderstanding of accuracy and repeatability

An accurate machine is capable of repeating, but a repeatable machine is not necessarily accurate. Repeatability refers to the exact round-trip between predetermined positions in accordance with the regular operation path. Accuracy is expressed by accurately moving to an accounting point in accordance with the path of the job. In the handling action, the robot moves to the position of some predetermined points after accounting, and the accurate function of the robot is used. Accuracy is directly related to mechanical tolerance as well as the accuracy of the robot arm.

Introduction to the misunderstanding of robot application - Epson robot

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