In modern society, teeth have become a symbol of health and beauty, and the demand for toothbrushes is gradually increasing. At present, the global annual demand for toothbrushes has exceeded 9 billion, and it is increasing at an annual rate of 10%. With a large population in China, toothbrushes are in great demand as a necessity for modern life. Although the toothbrush is small, it is a mature commodity with a huge consumption market. With the improvement of the quality of life, the quality of toothbrushes has also improved. The production efficiency and production quality requirements of high-quality health toothbrush equipment promote the development of high-speed toothbrush hair transplanting machines. . Manufacturers of toothbrush equipment used to use the same brand of single-chip control system and servo motor electric control system in the past, and most of the servo systems are imported from Japan. In recent years, Delta's servo products have been increasing their share in the high-speed toothbrush tufting machine industry with their excellent performance and competitive price advantages. Brief description of the principle of toothbrush tufting machine: The transmission structure of the high-speed toothbrush tufting machine consists of a main drive shaft and four servo drive shaft systems. The four servo axes are the horizontal X axis, the vertical Y axis, the flap Z axis and the hair changing U axis. The XY two-axis coordinates determine the position of the toothbrush hole, the Z-axis plays the role of changing to the next toothbrush, and the U-axis plays the role of changing the toothbrush hair color. When the spindle motor is running, the four electronically controlled servo axes will follow-up and the remaining four axes will follow-up and stop when the spindle stops. The rotation speed of the main shaft determines the speed of planting hair, and the four servo axes respond to the coordinated drive, otherwise there will be hair loss or uneven hair. Applying the high-precision electrical servo control of Foshan Taifenglai Brush Machine Machinery Factory can achieve 1000 times per minute of tufting speed, and it can achieve jumping hole tufting. Zhongda Servo Solution 1 Scheme Planning At present, the structure of the electric control system for planting hair is mainly divided into a single-chip control system or a CNC numerical control system. Among them, the single-chip control system is based on the integrated supporting services of the automation system manufacturer, and the independent research and development of the toothbrush equipment manufacturer is supplemented. The CNC numerical control systems with superior performance are mostly imported brands such as Delta's PUTNC-H2P and Europe and Japan. CNC numerical control mainly controls the axis pulse command signal to achieve servo drive, usually four-axis control output. Delta's CNC only needs two-axis output to achieve it. The other two axes of Zhongda's servo can be completed independently. Toothbrush tufting machine requires system It can realize two-axis interpolation operation. The four sets of servo drive models are Zhongda's B series ASDA-B AC servo system, with a power of 400W, and the drive has multiple function controls. The spindle motor inverter model is Zhongda's VFD-S, with a power of 400W. 2 Debugging points The difficulty in the development of the servo solution is the joint debugging of the electromechanical system, which is mainly the adjustment of the servo gain. Among the four servo axes, X-axis and Y-axis are relatively stable due to the mechanical inertia of the screw drive structure, and debugging is relatively easy, and the bandwidth can generally be adjusted to more than 130HZ. The Z-axis of the flap is a rotating axis. High-speed rotation has centrifugal force. If the bandwidth is simply set high, the motor will vibrate when it starts and stops. At this time, the position smoothing filter parameter can be turned on to eliminate vibration. Relatively speaking, the mechanical structure of the cam mechanism of the U-axis for hair removal makes debugging difficult. In addition, the mechanical rigidity of the U-axis is not good. When the motor is running, the inertia ratio changes greatly, and the motor output current changes greatly, so the parameters cannot be adjusted. Well, when the motor is running from side to side, the shaft either vibrates or screams, or reacts slowly. For this, it is necessary to apply the resonance suppression function of the B series ASDA-B AC servo system. When the low-pass filter (P2-25) starts to increase from 0, the B.W. will become smaller and smaller. Although the resonance problem is solved, the system response bandwidth and phase boundary are also reduced, and the system will become more unstable. If the resonance frequency can be known, the band rejection filter (P2-23, P2-24) can directly resonate The amount is eliminated. It is usually known how much resonance suppression is, and the effect of using a rejection filter is better than a low-pass filter, but if the resonance frequency will drift with time or other factors, and the drift is too far, then it is not suitable to use a rejection filter . The problem caused by the operation of the U-axis of the equipment in this project is that the resonance point is floating. It is better to use the P2-25 low-pass filter. The parameter is set to be large, and the position accuracy requirement of this axis is not too high, so the problem is solved . This article is from Foshan Taifenglai Brush Making Machine Machinery Factory, website: http://www.gd-tfl.com/ The company's main products are: hair planting machine, brush making machine, drilling machine, high-speed hair planting machine and other machinery equipment. Service Hotline0757-86407589
