PCBA Tech - SMT placement machine sensor and program editing

The SMT placement machine is a high-end production equipment that combines multiple technologies. One placement machine can be hundreds of thousands of mobile phones, and the high-end one will be one million/several million. It is the core equipment of the smt production line and the entire production line. The most expensive equipment, although the current domestic placement machines have begun to develop, there is still a big gap between the placement accuracy and various indicators and technologies from overseas imported brands. These gaps are mainly reflected in the placement head. The placement head has Various sensors.

What are the mounter sensors? Let me introduce to you

1. Placement head placement pressure sensor

Some imported brands do not have the placement pressure of the placement head. This is unique to the (ASM) Siemens placement machine. The placement head has a pressure sensor. The placement head will adjust the placement pressure according to the slight deformation and curvature of the board, so that Mounted components can be better mounted on the board without bending which may cause high pressure,

crushing nozzles and components, or dents causing poor quality problems such as empty placement of mounted components.

2. Negative pressure sensor

The placement machine must be able to pick up and mount components, mainly the role of a negative pressure sensor. When the components need to be picked up, pressure will be picked up, and then moved to the corresponding pad position through the X/Y axis and Z axis, and then through the negative pressure The sensor attaches the component to the PCB.

3. Position sensor

There are many position sensors on the placement machine, mainly the sensors at the inlet/outlet position. When the SPI detection is completed, but the placement machine has not been installed, the position sensor will not flow into the placement work area. Of course the most important The position sensor is on the placement head, it will identify the X/Y/Z axis and the PCB work area, and will not move the placement head to other placement work areas, so that the placement head can be smoothly placed in the designated work area Pick and place components inside.

4. Image sensor

The image sensor is a part of the visual recognition system of the entire placement head. The image sensor is the physical hardware part. It recognizes the size and contour of different components according to the recognition and illumination of the camera, and then different suction nozzles suck different components to the designated PCB pads. Position placement.

Editing of the placement program of the placement machine

In the placement processing plant, the placement machine is the most important equipment, and the placement machine needs to be programmed to be edited to enable it to absorb the component placement according to the program we set. The placement program is designed and edited., It is also conducive to increase the placement capacity of the placement machine.

The sequence and requirements for editing the placement program of the placement machine are as follows:

(1) Setting of the placement component program, the component program is to specify the position of the components placed on the PCB. The patch data includes component model, tag number, X coordinate, Y coordinate, placement depth, etc. Before mass production, it must be programmed according to the BOM provided by the customer.

(2) Benchmark data. Including MARK point, coordinates, color, brightness, etc., the camera of the placement head first searches for the benchmark. After the benchmark is found, the camera reads its coordinate position and sends it to the placement system for data analysis. The computer issues instructions and is controlled by the placement system. The placement head moves to enable precise positioning of the PCB

(3) Component database Component size, pin number, pin pitch and corresponding nozzle type, etc.

(4) FEEDAR arranges the data. The feeder arrangement data specifies the selected feeder of the component and the placement position on the placement machine trolley

(5) PCB data. PCB data includes setting PCB size, thickness, and board data, etc.