The important factors of the performance and accuracy of the paper tension tester

The important factors of the performance and accuracy of the paper tension tester

Paper Tensile Tester 400-071-1808/0769-89280808

1. The first is the force sensor of the tension machine, because the quality of the sensor determines the accuracy of the testing machine and the stability of the force measurement. Currently on the market, the small force of the sensor used in the machine generally uses the S -type sensor, and the value is generally used. Radial sensors, the internal sensor is generally resistive strain gauge type, if the strain gauge is not high accuracy or fixed strain gauge with anti-aging ability is not good or sensor material is not good will affect the accuracy and service life of the sensor. The imported sensors used by the world are sensor manufacturers in the United States. The sensors used by Hengyi Instrument Company have high precision, good linearity, and very stable performance, and will not change for decades.

　　 2. The second is the component ball screw that drives the sensor movement. If there is a gap in the screw, the future test data will directly respond to the maximum deformation and elongation after the test. At present, on the market, some of the lead screws are made of T -shaped ordinary lead screws. In this case, the first gap is relatively large, and the second one is that the friction force is relatively short and the service life is short. The lead screw used is a high-precision ball without clearance from Germany. Screw, surface quenching hardness HRC58-62 , service life of up to several decades. And to ensure the same accuracy.

　　 3. Once again, the drive system of the Rally machine. At present, the Rally machine drive system on the market is equipped with a speed reducer, and some use an ordinary belt. The main disadvantages of these two types of transmission methods are: the former needs periodic lubrication, and the latter is The synchronization of the drive cannot be guaranteed to affect the test results. Hengyi Instrument's tensioning machine drive system adopts full arc synchronous belt deceleration to ensure the synchronization precision of the transmission, high transmission accuracy, high efficiency, smooth transmission, low noise, no maintenance and long service life.

　　 4. Once again , the power source ( motor ) of the pulling machine is also called a motor. At present, some of the pulling machines in the market use ordinary three-phase motors or variable-frequency motors. This type of motor uses analog signal control, slow control response, inaccurate positioning, and general adjustment. Narrow speed range, high speed, no speed, no speed, low speed, no speed, and inaccurate speed control. The motor used by Hengyi Instrument's Rally machine is Panasonic's all-digital AC servo motor. The control method adopts all-digital pulse control. Wide speed range,

Up to 0.001-1000MM/MIN , accurate control positioning, fast response, 0.01 seconds can be added to full speed, the motor can ensure accurate full-scale speed control, and long service life, up to several decades, and no maintenance.

　　 5. The last is the measurement and control system ( ie, software and hardware ) of the Rally machine. Currently, most of the R& D systems of the Rally machine are controlled by an 8 -bit single-chip microcomputer. The sampling rate is low, and the anti-interference ability is poor. The other is the AD conversion. If the number of digits of the AD converter is the resolution is low. Then the measurement will not be accurate.