How to export Altium PCB to gerber files

Generating Gerber file

1. Open your .PCB design files on Altium designer software

Select File -> Fabrication Outputs -> Gerber Files.

2. General Setting

In the General Setting set the precision to 2:5 (0.01 mill resolution)

3. Layers Setting

Please make sure you have the clear outline in mechanical layer.

If your board are 2-layer, there will be no inner layer(G1,G2,G3....)

Include the layers that you want to export by marking these, lect “Used On” in Plot Layers, Select “All Off” in Mirror Layers.

4. Aperture Setting

Be sure to mark “Embedded apertures (RS274X)”

5. Advanced Setting

When you make sure all configurations are fine. Please click the OK to generate the gerber files.

Gerber Files are automatically loaded in the Altium cam viewer. This tool allows you to verify that all layers have been generated correctly and that they are all in positive mode.

Generating NC Drill File

1. Generate the Drilling layer in Excellon format.

File -> Fabrication Outputs -> NC Drill Files

2. We recommend you to choose the same units and format parameters as gerber. Then click OK.

Then you get all files. Please put them into a single zip/rar file.

Altium has published a guide on producing those files here: 
http://wiki.altium.com/display/ADOH/NC+Drill+Output+Options

If everything looks OK, upload the zip file to JLCPCB order page.

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