Product quality may also be a part of the reason. There are many reasons why the test data of universal material testing machine is inaccurate, which are all caused by the usual negligence fault problem. Our company bought it from Dongguan Gaoxin Test Equipment Co., Ltd. before, and they will tell us a lot about equipment maintenance. They can help us answer questions in time. I hope they can help you this time!

There is a blind spot in the verification of 1. force sensor: in general, the starting point of metrological verification is 10% or even 20% of the maximum load of the equipment, but many sensors with poor quality are just below 10%, with great errors;

2. The speed of the beam is unstable: different experimental speeds will get different experimental results, so it is necessary to check the speed;

3. Improper material selection of the manufacturer's sports beam: especially when doing large-tonnage metal test, the beam will deform itself because it is also stressed, which will also affect the test results. So it is better to choose a good cast steel material. If it is made of cast iron, it may even be overwhelmed and break directly.

4. Installation position of displacement sensor: Due to different designs, the installation position of displacement sensor is also different: but the one installed on the screw side will be more accurate than that installed on the motor;

5. Coaxiality (neutrality) is ignored: it may be the difficulty of inspection. Almost no one has done a thorough study on the coaxiality of the equipment, but if there is a problem with coaxiality, it will definitely affect the experimental results, especially for some small load tests. I have seen the equipment without fixed fixture base to do experiments, and the reliability of the data is clear at a glance;

6. Problems with the fixture: After long-term use, the jaws of the fixture will be worn and the teeth will be broken and deformed, which will lead to unreliable clamping or damage to the sample and affect the final test results;

7. Influence of timing belt or reducer: If the equipment in the production process is not careful enough, the aging life of these two parts will be accelerated, and if they are not replaced in time, the experimental results will be affected;

8. Failure of safety protection device: The consequences may directly damage the equipment. It is recommended to check regularly, because some may be caused by software failures. Be careful when sailing for a long time