First of all, it is the component ball screw that drives the movement of the sensor. Because the test data of the screw if there is a gap, the test data will be directly affected by the maximum deformation and elongation after the test. At present, the electronic universal testing machine on the market has a T-shaped ordinary screw, so that the gap is relatively large, and the frictional force is relatively large and the service life is short.

Secondly, it is the transmission system of the electronic universal testing machine. At present, some of the testing machine transmission systems on the market use reducers, and some use ordinary belts. The main drawbacks of these two transmission methods are: the former requires regular lubrication, and the latter It can not guarantee the synchronization of the transmission affects the test results.

Thirdly, it is the force value sensor of the testing machine. Because the quality of the sensor determines the accuracy and force stability of the tensile testing machine, the small force value of the sensor for the tensile machine on the market generally uses the S-type sensor, and the value of the force is generally used. Spoke type sensor, the inside of the sensor is generally resistance strain gauge type. If the accuracy of the strain gauge is not high or the anti-aging ability of the rubber used for fixing the strain gauge is not good or the material of the sensor is not good, the accuracy and service life of the sensor will be affected.

Fourth, the power source (motor) of the testing machine is also called a motor. At present, some electronic universal testing machines on the market use ordinary three-phase motors or variable frequency motors. The motors are controlled by analog signals, and the control response is slow and the positioning is inaccurate. The general speed range is narrow. There is no high speed at high speed or low speed, and there is no high speed, and the speed control is not accurate.

Fifth, it is the measurement and control system (that is, software and hardware) of the testing machine. At present, the measurement and control system of most tensile testing machines on the market adopts 8-bit single-chip microcomputer control, the sampling rate is low, and the anti-interference ability is poor, and the other is AD. Converter, if the number of bits in the AD converter is also low resolution. Then the measurement will not be accurate.

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