Several important factors that determine the performance and accuracy of the electronic universal testing machine
1. The first is the ball screw that drives the movement of the sensor, because if the screw has a gap, the future test data will directly affect the maximum deformation and elongation after break. At present, some of the electronic universal testing machines on the market use T-shaped ordinary screw rods. In this case, the gap is relatively large, and the friction force is relatively large. The service life is short. The screw rod used by Jiangdu Open Source Test Machinery Factory is German. Renef high-precision ball screw without gap, the surface quenching hardness is HRC58-62, and the service life can reach several decades. And to ensure that the accuracy remains unchanged.
2. The second is the transmission system of the electronic universal testing machine. At present, some of the transmission systems of the testing machine on the market use reducers and some use ordinary belts. The main disadvantages of these two transmission methods: the former requires regular lubrication, the latter This kind cannot guarantee that the synchronization of the transmission will affect the test results. The transmission system of the test machine of the open source instrument adopts a full arc synchronous belt to reduce speed, which ensures the synchronization accuracy of the transmission, high transmission accuracy, high efficiency, smooth transmission, low noise, and long service life without maintenance
3. Next is the force value sensor of the testing machine, because the quality of the sensor determines the accuracy and stability of the testing machine. At present, the small force value of the tensile force sensor on the market generally uses the S-type sensor, and the vigorous value generally uses the wheel For a radial sensor, the resistance strain gauge is generally used inside the sensor. If the precision of the strain gauge is not high or the glue used to fix the strain gauge is not good for aging or the sensor material is not good, it will affect the accuracy and service life of the sensor. The imported sensor used by the open source instrument is the world famous sensor manufacturer American Quantum Force Sensor. The sensor has high accuracy, good linearity, and very stable performance. It will not change for decades.
4. Once again, the power source (motor) of the testing machine is also called a motor. At present, some testing machines on the market use ordinary three-phase motors or variable frequency motors. This kind of motor is controlled by analog signals. The control response is slow, the positioning is not accurate, and the general adjustment The speed range is narrow. If there is high speed, there is no low speed, or if there is low speed, there is no high speed, and the speed control is inaccurate. The motor used by the open source instrument is the Japanese Panasonic full digital AC servo motor. The control method uses full digital pulse control, and the speed range is wide, up to 0.001 -1000MM / MIN, accurate control and positioning, fast response, can be added to full speed in 0.01 seconds, the motor can ensure accurate full-scale speed control, and long service life, up to several decades, without maintenance.
5. Finally, the measurement and control system (that is, software and hardware) of the test machine. Most of the measurement and control systems of the tensile machines on the market are controlled by 8-bit microcontrollers. The sampling rate is low and the anti-interference ability is poor. The other is AD conversion. If the number of digits of the AD converter is low resolution. Then the measurement will not be accurate. The measurement and control system of the open source instrument adopts the world's most advanced 32-bit ARM technology controller HytestV6.0. This controller is based on the 32-bit ARM platform and runs the time-multitasking operating system developed by our company. The program runs more smoothly. The system is more stable. The sampling rate can be up to 200 times per second. With the addition of 24-bit high-precision, low-noise and high-speed AD converter, the entire measurement and control system is more precise and highly stable to control the entire test process. The software of the host computer is an open source instrument. The fully digital three-bicycle control software developed in 2 years has two control methods a. PID control adjustment method b. Mohu control adjustment method (the first in the industry). The whole test process can achieve constant force value control, constant displacement control, constant deformation control, low frequency fatigue control, and program arbitrary control.
High Frequency Welding Machine, it provides a completely different finish than heat welding since its process it`s very different as well. This machine works with and electronic circuit that transmits a high frequency oscillation on a electric field alternating at high speed, the oscillation makes thermoplastic molecules to heat evenly to a melting point making them fuse completely after applying pressure and then refrigerating the materials resulting in a finished product that will be 100% waterproof with an airtight seal, flexible and with an impeccable visual finish while giving a higher stability, resistance and durability to projects with high climate exposure. Another advantage of radiofrequency its adaptability being able to penetrate on thicker materials or with multiple layers and adapt to different molds to cut on custom margins when needed. Some industries that benefit from this process are: automotive, medical, entertainment, stationery, fashion and household.
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