As we all know, electronic universal testing machine is composed of software and hardware, transmission system, ball screw, sensor, motor, etc. part. How to choose high quality testing machine. The five factors plays a decisive role.
1, software and hardware
High quality electronic universal testing machine with computer brand, the control system software for the Windows XP operating system platform, with fast speed, moderate interface, easy to operate, and other characteristics, to meet the needs of the measurement of different materials, according to the national standards, international standards or industry standards measure all kinds of material physical performance test.
2 transmission system
There are two main types of transmission electronic universal testing machine, a synchronous gear belt is arc, the ball screw; two is the ordinary belt drive. The first transmission mode of stable transmission, low noise, high transmission efficiency, high precision, long service life. Second kinds of transmission can not guarantee the synchronization of the transmission, so the accuracy, stability, and so on are not as good as the first transmission system.
3, ball screw
Electronic universal testing machine at present the use of lead screw ball screw and trapezoidal screw. Generally speaking, the trapezoidal screw gap is relatively large, the friction force is relatively large, the service life is short. At present there will be some manufacturers in the market, in order to save costs to obtain greater profits will be used to replace the ball screw trapezoidal screw.
4, sensor
Sensor is the precision of the testing machine and measuring an important component of the force stability, the market of electronic universal testing machine sensor type have type s, spoke. The sensor of resistance strain gauge precision and fixed strain gauge with adhesive, anti aging ability is not good, not good sensor materials will affect the accuracy of the sensor.
5, motor
High quality electronic universal testing machine adopts AC servo motor speed control system, Panasonic AC servo motor, stable and reliable performance, over-current, over-voltage, overload protection device. Currently on the market and an electronic universal testing machine using ordinary three-phase motor or frequency conversion motor, this motor using analog signal control, the control response is slow, inaccurate positioning, narrow the scope of the general speed with high speed is not the speed or low speed is not high, and the speed of the control system is not accurate.