With the continuous improvement of electronic product innovation technology, the production process and quality requirements of PCBA printed circuit boards are becoming increasingly stringent. As one of the key links in PCBA printed circuit board processing, the cleaning requirements of PCBA printed circuit boards are relatively demanding. As an online fully automatic PCBA printed circuit board cleaning equipment, the automatic brush machine combines PCBA printed circuit board transmission technology with brush cleaning technology. It does not require manual contact with cleaning agents and can use traditional board washing water. The equipment uses multiple brushing in multiple directions in front, back, left, and right to ensure that there are no dead angles in the cleaning, so that the PCBA printed circuit board meets the corresponding cleanliness requirements. It is especially suitable for cleaning the welding surface of single-sided PCBA printed circuit boards.
In terms of structural composition, the system covers multiple components including feeding and connecting mechanism, transportation mechanism, brush cleaning system, circulation filtration system, air drying system, PLC controller, variable frequency speed regulation and other automatic control systems. The system adopts an independent modular design to ensure easy operation and convenient maintenance.
The main cleaning process follows the following steps: first, the material is fed, then it enters the first-level brush cleaning stage, followed by the second-level disc brushing stage, then the third-level brush cleaning, and finally the fourth-level disc brushing stage.
1. Mechanical transmission device and hydraulic control are adopted.
2. The motor drives the oil pump to rotate the drum, and at the same time, the power is transmitted to the screw through the gear reducer to make the brush move up and down for cleaning;
3. When the brush reaches a certain position during operation, the motor will automatically shut down (i.e. safety protection function) to ensure the safety of the user.
4. The machine has overload and overheating alarm systems, as well as fault self-detection and abnormal situation handling functions to ensure the safety and reliability of the equipment.
FRECON inverters have been widely and maturely applied in fully automatic plate washers and have achieved remarkable economic results. They have not only significantly improved system production capacity, but also effectively achieved system energy saving, thus gaining the trust of users. Next, we will introduce in detail the actual application of FR500A vector inverters in fully automatic brush machines.
In the conveying and cleaning system, the system uses 5 FRECON FR500A inverters, one of which is dedicated to the conveying mechanism, and the other 4 are configured in the cleaning system. All inverters and touch screens together build a single-master-multiple-slave MODBUS communication control system, which uses the touch screen to achieve real-time monitoring and operation of the inverter, thereby ensuring the fully automated operation control of the plate washer.
The FR500A inverter is a high-performance product of FRECON, which reduces the design and maintenance costs and improves the energy-saving efficiency of the system. Its RS485 interface facilitates multi-machine networking, has strong anti-interference ability, and stable communication with the host computer. It is easy to debug, can accurately control the motor speed, meet the various cleaning needs of the equipment, and improve work efficiency. The inverter has multiple protection functions, strong overload capacity, and is stable and durable.
