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How PCB Output Gerber Files And Assembly Files?

What kind of documents is needed for the PCB factory to make the board?

  • As PCB design is confidential, so PCB gerber file which is unified industry standard file is required, PCB factory can use CAM software input PCB gerbr file.
  • Mechanism diagram: long width thickness and its tolerance requirements, as well as square holes and slot and some odd shape mechanism sizes. In accordance with the manufacturing process of PCB plant, do not be too strict, too strict will only increase the cost. The mode punching is not the same as the tolerance of CNC.
  • Process Description: the number of layers, the color of solder mask, the color of the character, the requirement of the surface treatment, the quantity, the delivery time and so on.

If PCB need be sent to assembly factory to make PCBA,then below files are necessary.

  1. Bom list included components list
  2. Non welding list
  3. SMT coordinate file
  4. Components schematic diagram
  5. Manual welding list
  6. Stencil file

How to output gerber files from PCB design file?

  1. Gerber file output for PCB file designed with Altium designer

Open “Gerber Files” option

File—>Fabrication Outputs—>Gerber Files

 PCB Gerber file output

PCB assembly files:

  1. Bom list

Reports—>Bill of Material

  1. Non welding list

According to the list of first step components

  1. The methods and steps for the output of SMT coordinate files
  • Open a PCB file: File—>Open
  • TopLayer—>Edit—>Select—>All on Layer,
  • BottomLayer—>Edit—>Select—>All on Layer
  • After then press button “Shift+Delete” to delete the redundant circuits of Top and bottom layer.
  • Select [ Design / Options…],open the layers button,tick the [Toplayer]/[BottomLayer] of Singal Layers,then tick [Top Overlay]/[BottomLayer] of Silkscreen,then tick [Keepout] of Other. Note: you also can turn off Top and Bottom individual, it’s more clearer.
  • After the above steps have been completed, it clearly show the position of the pad screen printing.
  • Select [Edit / Origin / Set] to set the location of the origin (* set the location of the PCB origin, remember the location of the PCB origin on the machine should also be set here).
  • Select [File/CAM Manager..] ,then select “Pick Place”, tick “Text”, and always point to the next step, the unit chooses “Metric”, completes generating a “Pick Place” file, and selects “F9 Generate CAM Generate”.
  • In the CAM for.. Directory of the [Explorer] window on the left, find the “Pick Place.. File”, and the right key to output to the target path you want.
  • Then open this Pick Place file with Excel and collate it into the files that SMT needs, in which Mid X and Mid Y are X, Y coordinates required by SMT.

          Note: TopLayer and BottomLayer should be separated when they are arranged

  1. Position screen map of product components
  • Schematic diagram of surface parameters

The top surface parameters indicate the resistance of the TopOverlay layer, the resistance of the capacitance, the IC, the capacity value, the name of the IC, and so on (10K, 1UF. MAX354 etc.)

Note: all the parameters are best in the middle (within the plate screen).

Steps and methods:

  1. A . Open a PCB file in DXP
  2. Select only TopOverlay and KeepOutLayer
  3. Hide the number of the components, display only the parameter, put the parameters of each component in the plate screen, and put it in the middle, and pay attention to the consistency of the tidy and the direction.
  4. Select [File/Smart PDF]. ] export to a PDF file
  • Top numbering schematic

The numbering of the top surface is the number of the resistance, capacitance, and IC of the TopOverlay layer (R1, C1, U1, etc.)

Note: the best numbers are in the middle (within the plate screen).

Steps and methods:

  1. Open a PCB file in DXP
  2. Select only TopOverlay and KeepOutLayer
  3. Hide the component parameters, only display the number, put the number of each component in the plate screen, put it in the middle, and pay attention to the consistency of the tidy and the direction.
  4. Select [File/Smart PDF]. ] export to a PDF file
  • Manual welding device list

Collate according to the list of BOM tables

  • PCB stencil file

Provide by hardware department.

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