In servo system application on quartz crystal cutting equipment

Of servo system on the quartz crystal cutting equipment performance dentsu co. , LTD. Diligence and welcome to visit e Lou exhibition hall 4 and motion control hall motor servo drives, servo motor, servo control system, CNC system,. 。 。 Pick to: in this paper, based on the platform of B series servo control system of quartz crystal components cutting automation design technology. The project has been developed. In this paper, for system debugging empirical summary is given. Keywords: servo system; PLC； HMI； Constant tension 1 introduction mainly quartz crystal components producers in Asia, including China's a big advantage in production and technology level. In recent years, along with our country economy fast development, the crystal industry have greater development in our country, Japan's leading crystal manufacturers basic mature products are moved to the production in our country, it makes our country become one of the world's main producer of crystal. At present, in terms of quantity, and has become a producer in China, including foreign-invested enterprises, annual production of about around billions. With China's accession to the WTO and the establishment of the status as the world's factory, the production of crystal, crystal cutting equipment requirements also more and more. The previous crystal cutting equipment are imported from Japan. Imported equipment is bound to the high cost, increasing need of crystal cutting equipment. Taizhou company production of quartz crystal cutting equipment research and development success, provide more choices for people, can reduce the production cost, improve the quality of production. 2 crystal quartz crystal cutting cutting equipment process description process is the process of drawing and cutting compound action of the two. With wire drawing machine wire drawing action or film and roll motion are exactly the same. Working process can be basically divided into pay-off, wire drawing, wire etc. 3 part of the process. But the control precision and high stability, choosing high-end cutting thread ( Copper wire) 。 Different rules of precision products, different crystal frequency, to choose different specifications of the wire line diameter. Cutting process is cutting wire in the process of rolling movement ended, place the quartz crystal workbench (at very slow speed About 5 mm per minute) To cut wire direction to achieve the purpose of cutting. The workbench's slower, stable running, high positioning accuracy. 3 sets of servo system application design 3. 1 the scheme design of cutting equipment and volume part is the hardest part to control the whole system; Is to determine the parts of equipment production efficiency. In order to raise the production efficiency and raise the quality of the products. Choose very good mechanical properties of servo system and volume to realize synchronous control and constant tension control. Touch screen for human-computer interaction in the system operation ( Set the parameters/state condition, etc. ) ； PLC mainly as servo fixed-length control and constant tension control; Servo system used for fixed-length control; Frequency converter to control the ribbon cable. In order to improve the efficiency of cutting equipment, servo to frequent start-stop system requirements, and ensuring the start-stop and deceleration process to ensure that the pay-off is very smooth. By adjusting parameters of B series servo system fully meet the requirements. In order to ensure the table can with a 5 mm per minute smooth running at low speed and high cutting precision, recommend client configuration precision reducer. 3. The composition of control system (2 1) Servo: in B series of 0. 4-2 kw, a total of 5 servo inverter: VFD022B43A two; （ 2) PLC controller: in DVP28SV + DVP 01聚氨酯; （ 3) HMI: in DOP - A75BSTD。 3. 3 equipment debugging the whole system in the process of starting, acceleration, deceleration, parking requirements pay-off can balance soon. Startup asked Lord has high start torque, speed and not fall. Servo three hundred percent load capacity to ensure that the startup at low speed high torque. Raise work efficiency, called for the control system can fast speed change accordingly, faster response to the change of floating pole also. Servo deceleration time needs to be shorter. It is better to put volumes of servo deceleration time longer than drawing deceleration time. In order to ensure the start, acceleration, deceleration and stop and in the process of smooth roll system, winding and rolling of the PID parameters of the position and speed up the gain to; Integral gain setting slightly larger, integral cycle is long, so that can guarantee fast speed accordingly and the balance of the floating bar. In addition, when using the PLC program is longer, the scanning time is longer, the constant tension and impact on the reaction rate. Best TO use less as far as possible the FROM/TO instructions and simplify the PLC program. 4 last word used in industrial control system to complete the function of quartz crystal cutting equipment can fully meet the requirements of customers, crystal cutting precision and efficiency is improved, the desired design effect. System start, acceleration, deceleration and stop, the dynamic process of floating rod stable equilibrium position in a small range of a slight oscillation.
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