{"id":2967,"date":"2024-01-04T10:11:09","date_gmt":"2024-01-04T02:11:09","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=2967"},"modified":"2026-10-02T17:38:47","modified_gmt":"2026-10-02T09:38:47","slug":"the-9-basic-steps-of-cam-production","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/the-9-basic-steps-of-cam-production\/","title":{"rendered":"The 9 Basic Steps of CAM Production"},"content":{"rendered":"

In the PCB (Printed Circuit Board) manufacturing process, the basic steps of CAM production cover every aspect from file import to the output of drilling and plotters data. This article will provide a detailed overview of these steps to ensure the efficient and accurate production of PCBs.<\/p>\n

\"The<\/p>\n

1. Import File<\/h2>\n

In CAM350, each PCB consists of different layers, including the via placement layer, the drilling layer, the trace layer, the solder mask layer, and the text layer. First, we need to import these files and check their integrity. Ensure that the layers are aligned and set the origin. Arrange the layers as needed and delete any unnecessary layers.<\/p>\n

2. Drill Hole Processing<\/h2>\n

If the customer does not provide a PCB drilling file, you can convert the hole sizes and locations to Flash format and then convert them to a drilling file. If a drilling file is provided, adjust it according to manufacturing requirements. Check the minimum drill hole diameter, the minimum spacing between holes, and the minimum distance between the hole edge and the mold edge to ensure they meet process requirements.<\/p>\n

3. Line Processing<\/h2>\n

First, measure the minimum trace width and spacing to ensure they meet process requirements. Next, apply trace width compensation based on the PCB type and copper foil thickness. Check whether the trace pads are aligned with the drill holes; if they are not, use the appropriate command to adjust them. Verify that the ring around the trace pads is sufficiently large and that the clearances between the traces and NPTH holes, slot edges, and molding edges meet the requirements. Finally, use DRC (Design Rule Check) to verify the clearances between traces, between traces and pads, and between pads.<\/p>\n

4. Solder Mask Application<\/h2>\n

Check the alignment of the solder mask with the circuit pads, the spacing between the solder mask and the circuit traces, and the spacing between the solder mask and the circuit pads. Ensure that the solder mask has the minimum required width and that there are solder mask stoppers of the specified size at the NPTH holes.<\/p>\n

5. Word Processing<\/h2>\n

Check the line width, height, and hollow diameter of the text, as well as the spacing between the text and the circuit traces and pads, the distance between the text and the mold edge, the spacing between the text and vias or slots, and the spacing between the text and solder-mask-covered PTHs. Add the UL mark and date code as required by the customer.<\/p>\n

6. Contiguous Areas and Edge Handling<\/h2>\n

Assemble the parts according to the specified assembly method, then process the edges. Add AI holes,\u5b9a\u4f4d holes, optical marks, customer part numbers, etc.<\/p>\n

7. Layout and Production of Process Margins<\/h2>\n

Lay out the pieces according to the layout specified in the cutting list, and create the process edges in accordance with the manufacturing specifications.<\/p>\n

8. Laminating<\/h2>\n

During the CAM production process, you can set the background polarity, positive film properties, and negative film properties to control how layers are overlaid.<\/p>\n

9. Output drilling and plotter data<\/h2>\n

After completing the CAM data, record the minimum line width, line spacing, and copper area of the original board and the work-in-progress board. Following inspection by a designated person, print the hole size and placement report, as well as the drilling and plot data.<\/p>\n

The drill data output format is typically \"Leading 3,3\" (metric), but this may vary depending on requirements. The plot data output format is Gerber RS-274-X, \"Leading 2,4\" (imperial).<\/p>\n

By following these basic steps for CAM production, PCB manufacturers can ensure the efficiency and accuracy of the manufacturing process, thereby producing high-quality printed circuit boards.<\/p>\n

\n

Frequently Asked Questions<\/h2>\n

1. What is CAM production?<\/h3>\n

CAM is a computer-aided manufacturing process used in PCB production. It encompasses a series of steps, from file import to the generation of manufacturing data, to ensure the quality of the PCB manufacturing process.<\/p>\n

2. Why is it necessary to treat drill holes?<\/h3>\n

Drilling is a critical element in connecting different layers of a PCB. The drilling process involves steps such as converting hole positions, adjusting hole sizes, and checking hole clearances to ensure they meet process requirements.<\/p>\n

3. What is DRC?<\/h3>\n

DRC stands for Design Rule Check, which is used to verify whether a PCB design complies with specific design rules and manufacturing requirements.<\/p>\n

4. Why are UL MARK and DATE CODE markings added?<\/h3>\n

The UL Mark and date code are important identifiers used to identify and track PCBs; they are crucial for quality control and traceability.<\/p>\n

5. Why is it necessary to output drilling and plot data?<\/h3>\n

Exporting drilling and plot data involves converting the CAM output into the file formats required for actual manufacturing, so that PCB manufacturers can proceed with production and processing.<\/p>","protected":false},"excerpt":{"rendered":"

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