PCB Tech - The realization of high-end PCB drilling

The high-end PCB drilling and milling machine control system has always been monopolized by the German company SIEB&MEYER. In order to break this situation, after in-depth analysis of the technology and market status of this type of controller, the author gave a technical route to build a high-end control system and integrated software. Engineering ideas, database technology, and the world's top motion control and servo drive technology to achieve a breakthrough in this technology, and finally developed a high-level PCB drilling and milling control system into industrial applications.

The high-end CNC system is different from the general machine tool controller, which is mainly reflected in the more flexible and open architecture, faster response speed, higher control accuracy and more humanized interface functions. It is also the realization of automation in the manufacturing industry. The key to flexibility, integration, networking, and digitization [3]. Compared with the established reality that the CNC system of medium and high-end metal cutting machine tools is monopolized by FANUC (Japan) and SIEMENS (Germany), the high-end CNC system of the PCB (Printed Circuit Board) board processing industry is a more realistic breakthrough, while electronics and information The rapid development of technology has made the PCB industry optimistic for a long time, and domestic high-end CNC systems have suddenly emerged to break the possibility of long-term lagging behind Germany and Japan in multi-axis CNC systems [5]. At present, the PCB special machine tools in China and Taiwan are developing rapidly, but the high-end CNC technology is mainly imported from the CNC84 series products of the German SIEB&MEYER company, although the equipment manufacturers have never given up on their own development and replacement of the CNC84 system., However, it has never been to the point.

In order to break this technological monopoly, the author conducted an in-depth investigation of the current market and technical status of the controller in the PCB drilling and milling field, analyzed the reasons for this gap, and used the industry accumulation for many years while touching the most advanced computers. And information technology to create a truly international-level CNC system, hoping to break the monopoly of foreign systems in the field of PCB board machining processes, and then gradually ban similar foreign products, and allocate them to PCB drilling and milling machine manufacturers. Drilling and milling are two important links in the PCB board production process (these two equipment account for more than 60% of the investment in the entire production line [4]) to make the core technology localized and improve the production equipment of China’s circuit board industry for a long time in the assembly of foreign manufacturers. The embarrassing situation of "workshop" has improved the position and profitability of the entire industry in the industry chain.

1 Analysis of the status quo of high-end drilling and milling machine controllers

PCB board production has gone through a process of transition from Europe and America to Japan and South Korea, then to Taiwan, and finally to mainland China. Along with this process, the manufacturers of circuit board equipment also showed the same regionality, but there was a certain degree of lag in time. So today, equipment manufacturers in the United States and Europe are gradually declining, replaced by rising stars from Japan, Taiwan and even mainland China. The current supply of high-end drilling rigs is about 5,000 units per year, of which Hitachi, a Japanese company, accounts for nearly 30% of the market., Huge, Ende, etc. accounted for 30 to 40% of the share, and the rest was divided between European manufacturers and emerging mainland manufacturers. Among these machine tools, with the exception of Hitachi, Taiwan's large number of POSALUX (70-80 units) and Germany's SCHMOLL (due to Hitachi’s weakness, it reached an unprecedented 1,300 units in 2013), most of the manufacturers’ machine tools are equipped with German machines. The product of SIEB&MEYER company.

With the decline of the earliest drilling rig manufacturer, EXCELLON in the United States, SIEB&MEYER, located in Hamburg, Germany, has a great opportunity to launch and improve the CNC system used in PCB machining processes with the cooperation of HITACHI (Hitachi). . With the subtle changes in German-Japanese relations, SIEB&MEYER's products finally separated from Hitachi machines and developed independently. CNC84 system is its latest product, with powerful software technology and processor technology, in addition to supporting advanced real-time communication network protocols In addition to SERVOLINK, it can also support the most innovative motor control mode, a new type of fully digital servo control system based on AC permanent magnet synchronous motors, and a space vector control scheme. The position control system consists of a current inner loop, a speed loop and a position outer loop. The adopted algorithm is implemented by corresponding modules, including: PARK transformation module, CLARK transformation module, inverse PARK transformation module, inverse CLARK transformation module, speed calculation module, position calculation module, PI adjustment block, space vector PWM generation module, current feedforward module Wait. Based on the advanced nature in the field of overall process solutions and control technology, SIEB&MEYER's products have shown excellent performance in production practice. Although its flagship product CNC84 system has only been put on the market in early 2005, it has become the most well-known drilling rig in the world. The system is powerful and beautiful. At present, the main high-end drilling equipment in the mainland and Taiwan are equipped with this system, which accounts for half of the entire PCB drilling rig system.

1.2 Analysis of the current situation in Taiwan and the mainland

The situation in Taiwan is relatively simple. Most equipment manufacturers have selected SIEB&MEYER products. The situation on the mainland is a bit more complicated, roughly divided into two regions and three levels. Let me talk about the two regions, namely the Sichuan system and the coastal system. The Sichuan area was the first to develop circuit board production equipment in China. However, due to the geographical and technical double-layer occlusion, the products are relatively low-end and are basically not included in the statistics of high-end machines. The coastal area mainly refers to the Pearl River Delta region. Because of directly borrowing technology from Europe, America and Japan, the starting point is very high and the development is fast, and a number of more powerful equipment manufacturers have emerged.

The three levels are divided according to the technical performance indicators of the manufacturer’s products: the first level manufacturers either use the CNC84 system completely, such as Taiwan Dongtai, Longze, Ende, Suzhou VEGA, etc., or use the two-legged solution, that is, high-end Products such as six and seven-head machines use CNC84 systems to ensure performance and functions, and low-end products such as four-head or less drilling and milling machines use a simple system developed independently to reduce costs. Typical manufacturers such as Shenzhen's Han's CNC; second level The manufacturer developed the system independently because he refused to accept the high price of the CNC84 system, but this kind of system can only meet the simplest functional requirements, many intelligent functions and job management have not been realized, and it basically stays at the manual workshop-level product stage., Can not pose a substantial threat to the products of SIEB&MEYER. Such manufacturers such as Huizhou Tianma and Shenzhen Qianghua, although the mechanical part has some characteristics, the performance and price of the whole machine are discounted because of the inadequate CNC system; third The level is the lower-end equipment manufacturers. Machinery, electrical and software are all the lowest-end configurations. They live in a relatively hidden market space. They are not reflected in the authoritative machine tool statistics, but there are quite a few. .

Based on the domestic and international situation, the German Sibermeyer operating system, the world's most famous drilling machine system, is powerful and perfect, and the German Sibermeyer operating system, the world's most famous drilling machine system, is powerful, perfect, and visible at present. The CNC84 system of the German SIEB&MEYER company is outstanding in the industry, especially in the field of high-end equipment numerical control, so it has naturally become a benchmark and a target for everyone to follow. If we can independently develop a system equivalent to the CNC84 system technology level, and rely on our natural advantages in labor costs and after-sales service, we can not only compete with SIEB&MEYER for the first-level customers, but also win and upgrade the second-level PCB manufacturers.