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The original data of SMT placement machine programming

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The pick and place machine program consists of a lot of information. Before programming the pick and place machine, in addition to the inherent parameters of the machine, it is generally necessary to prepare the following basic raw material parameters.


1. The coordinate data of the component

The coordinate data of the component refers to the coordinate position of the component on the circuit board, that is, the x, y coordinates of the component and the mounting angle of the component. The coordinate data provided also includes the coordinate data of the reference point, the designator of the component, and the package information etc.


The design department of SMT manufacturers widely uses computer-aided design or manufacturing software (CAD/CAM) to design circuit boards, and most of the feature data required for pick and place machine programming can be obtained from the relevant data files of the CAD/CAM system. In general, CAD/CAM systems can directly output text files with component coordinate data.

PCB-7

2. Component list and component information

The component list is also called the bill of materials (BOM), which includes the material code of the component, the type and description of the material, the packaging standard, the designator of the component, and the amount of this material used in the product. Programmers can know the code, number and quantity of various components through BOM. The component information includes the characteristics and the packaging of the material.


The characteristics of the material, such as the length, width, thickness of the component, and the spacing and length of the pins, are used for the establishment of the component database during programming. In addition, the programmer also needs to know the packaging of the material to select the appropriate feeder for the material and determine the appropriate angle for the material in the feeder list.


3. Circuit board information

The information of the circuit board can provide 3 aspects of information to the programmers:  

1) The size of the circuit board and panelization of the board;

2) The package information of the component--for special components that cannot be fully represented in CAD and BOM, the component database can be edited through the component's land pattern;

3) The actual SMT mounting angle of the component--the information of the circuit board can be obtained from an empty board without components, or the electronic graphics of the circuit board.


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