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Labeling PCB for assembly.

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I'm remaking a PCB design that needs to be assembled at the manufacturer.  I was given a on old PCB design on paper and have recreated it in Eagle.  Where I'm stuck at right now is not knowing how to properly label the PCB so that the assembler can know where each component goes.  I'm afraid if it's not labeled correctly, diodes will be assembled backwards or components will be soldered incorrectly.  This is the design so far.

 

 

http://i.imgur.com/BxBGY.png

It's a part for a 1960's Pontiac tachometer.

 

 

The current labeling is not too good for someone who's never seen this board, but that's what the old design had.

 

 

I skipped the schematic part of the PCB designing, assuming that since I already have the routing laid out I didn't need it.  Is this wrong?

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    bobdude161 wrote:

    I'm remaking a PCB design that needs to be assembled at the

    manufacturer. I was given a on old PCB design on paper and have

    recreated it in Eagle. Where I'm stuck at right now is not knowing

    how to properly label the PCB so that the assembler can know where

    each component goes. I'm afraid if it's not labeled correctly, diodes

    will be assembled backwards or components will be soldered

    incorrectly. This is the design so far.

     

    >

    http://i.imgur.com/BxBGY.png

    It's a part for a 1960's Pontiac tachometer.

     

    >

    The current labeling is not too good for someone who's never seen

    this board, but that's what the old design had.

     

    >

    I skipped the schematic part of the PCB designing, assuming that

    since I already have the routing laid out I didn't need it. Is this

    wrong?

     

    It's fine to design a board only when it is as simple as yours. You do loose

    ERC checking without a schematic but that does not matter here if it

    replicates the original design.

     

    You can have as much or little text on your board. Your text may be copper

    or screen print, as you wish. Just put it on the appropriate layer.

     

    What you need now is a picture that the assembler can use. Normally you

    would have created packages in the library where the shape of the diodes etc

    reveal their orientation.

    Without these packages, which I suspect is your case, you need to draw  them

    in one of the Documentation layers and provide that to the assembler along

    the listings of what the parts are.

     

    Alternatively if  you wish to have the board built by a PCB house, with

    silkscreen printing (usually white ) to depict the components then draw

    these in the tPlace layer

    This layer can be included in the documantation to the asembler .

     

    HTH

    Warren

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