Main factors affecting the performance and accuracy of tension machine:

1. The force value sensor of the tension machine, because the quality of the sensor determines the accuracy and force measuring stability of the testing machine. At present, the sensors for the tension machine in the market generally use S-type sensors for small force values, spokes sensors for large force values, and resistance strain gauge sensors, If the accuracy of strain gauge is not high or the aging resistance of the strain gage is not good, or the material of the sensor is not good, the precision and service life of the sensor will be affected. The imported sensor used by Weibang instrument is the sensor produced by the world-famous sensor manufacturer. The sensor has high precision, good linearity and very stable performance, and will not change for decades.

2. The tension machine drives the ball screw, the moving part of the sensor, because if the screw has a gap, the future test data will directly respond to the maximum deformation and elongation after fracture of the test. At present, some screw rods of tension machines on the market are T-shaped ordinary screw rods. In this way, first, the gap is relatively large, second, the friction force is relatively large, and the service life is short.

3. The transmission system of tension machine. At present, some of the transmission systems of tension machine in the market use reducer and some use ordinary belt. The main disadvantages of these two transmission modes are that the former needs to add lubricating oil regularly, while the latter can not ensure the synchronization of transmission and affect the test results. The transmission system of the tension machine of Weibang instrument adopts full arc synchronous belt for deceleration, which ensures the synchronous accuracy of transmission, high transmission accuracy, high efficiency, stable transmission, low noise and no maintenance of service life.