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Mixed bottom and top layer

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  • Boss .

    It sounds like you have accidentally selected two layers for one plot.

    Click on each plot file in the plot list in the left part of the window to highlight it, the right pane is the settings used to produce just the highlighted plot. I suspect in the Layers tab you may have accidentally ticked the wrong layer to be included.

    There should normally be only one layer selected for each plot, except the board outline which here I have included on the top copper plot.

    You must always check your Gerber plots before sending to the manufacturer or you may waste time and money as not all of them check and report back on obvious errors.

     

     

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  • Bo Sørensen

    Thanks for your reply, and you're right. I thought that one could make all plots in one time. I will try this tomorrow.

    I did check, but didn't notice.

    So what I read is that I have to make plots for each layer?

    Lucky for me, the manufacture checked and stopped the process :-)

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  • Brad Levy

    Bo, when you select Output > Manufacturing Plots... from the menu, and then click Run (after optionally changing some of the plot settings), all of the plots checked in the left column (Plots) of the Output Manufacturing Plots dialog will be generated. (You don't have to run Output > Manufacturing Plots... separately for each plot.)  The settings shown on the different tabs (Output, Layers, Settings, Position) of the right hand column (Settings for Plot plotname) apply to the plot currently selected in the left column. Each plot has its own set of settings that are remembered for that plot from one time to the next.

    As Boss said, normally you include only one copper layer in each plot, though you may include the board outline in some of them as well. But you may combine layers for special purposes. For example, you might include Top Copper, Board Outline, Top Silkscreen, and Top Documentation in one plot to serve as a drawing to aid in troubleshooting or for installing components that can't be inserted automatically.

    But normally gerber files output for etching boards each contain only one copper layer, because the gerber file format doesn't have commands to "start new layer", etc. So outputting multiple layers in one gerber file is usually a mistake.

    The newer ODB++ format can store multiple layer and other files in one compressed archive for communication between customers and vendors. But not all board houses accept it.

    PDF files are usually used for documentation, not manufacturing. But since the file format includes new page commands, multiple plots can be output in one file if desired. There is a check box for this in the Output Manufacturing Plots dialog, if you click the Options... button, and then click PDF under Device Setup. 

     

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  • Bo Sørensen

    Thanks Brad, I got it :-) 

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