The rubber and plastic tensile testing machine is one of the most important equipment for testing the mechanical properties of rubber, plastics, and composite materials. Its measurement results have critical significance for material research and development, quality control, and process optimization. Therefore, timely and accurate diagnosis of faults and daily maintenance are essential for ensuringRubber tensile testing machineStability, reliability, and testing accuracy are crucial.

1、 Common faults and diagnostic methods

1. Unstable or fluctuating force values: This situation is often related to the sliding of sensors, amplifiers, or fixtures. Firstly, it is necessary to check whether the force sensor has been impacted, overloaded, or has loose wiring; Secondly, observe whether the sample slips during the testing process. If the fixture surface is worn or the clamping force is insufficient, it can also cause fluctuations in the force value. In addition, improper setting of filtering parameters in the control system may also cause unstable display.

2. Inaccurate displacement display or zero drift: Displacement measurement is usually achieved by grating rulers, encoders, or displacement sensors. When there is a deviation, the fixed structure of the displacement sensor should be checked for looseness, and the grating ruler should be checked for dust contamination; Confirm again whether the calibration parameters within the control system have been incorrectly modified. If there is continuous drift in displacement, it may be caused by large changes in ambient temperature or sensor aging, and needs to be recalibrated or replaced.

3. Abnormal operation of the crossbeam: Focus on checking the servo motor, driver, screw, and lubrication system. If the crossbeam does not move, it may be triggered by limit switches or motor driven alarms; If there is a lag, it is often related to a lack of oil in the lead screw, contamination of the guide rail, or damage to the bearings; Unstable speed is usually caused by abnormal servo parameters, feedback signals, or load changes.

4. Computer or software cannot connect to the host: often due to damaged communication cables, abnormal serial/USB interface drivers, or incorrect control software configuration. It can be investigated by replacing the data cable, reinstalling the driver program, checking the baud rate, and other methods. If the control board is damaged, professional repair is required.

2、 Maintenance techniques and key points

1. Regular calibration and testing: The force, displacement, and velocity systems should undergo professional calibration at least once a year. The sensor is the core component of the rubber tensile testing machine and must be maintained within the specified accuracy range, otherwise it will directly affect the test results.

2. Cleaning and lubrication of mechanical structures: Moving parts such as screws, guide rails, and bearings should be regularly cleaned and lubricated to prevent wear and jamming. The operating environment of the equipment should be kept dry and clean to avoid dust entering the motion system, which may affect accuracy and lifespan.

3. Electrical system maintenance: The interior of the control cabinet should be kept ventilated and clean. Regularly check if the wiring terminals are loose to ensure that the driver and control board operate within a safe temperature range. When an alarm light appears, it should be promptly recorded and checked according to the instructions.

4. Software system backup and update: Regularly backup test data and configuration files to avoid data loss caused by computer failures. Ensure that the experimental software is at the latest version for optimal stability and functional support.

5. Proper use and operation training: Improper operation is an important cause of malfunction. It should be ensured that operators master the correct clamping methods, sample installation requirements, and testing procedures to avoid situations such as sensor overload, fixture impact, and accidental beam collision.

Although the faults of rubber tensile testing machines come in various forms, most of them can be avoided through standardized use, regular maintenance, and timely diagnosis. Good maintenance not only improves the accuracy of test results, but also extends their service life and reduces maintenance costs. By establishing a comprehensive maintenance and training system, it is possible to maintain the best working condition at all times, thereby providing reliable technical support for material testing.