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EAGLE User Support (English) Make PCB etched route wider?
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Related

Make PCB etched route wider?

velocity
velocity over 11 years ago

Hello everyone,  I'm new to Eagle Cad and was wondering if anyone could give me a tip on widening the etched route lines when I go to make a PCB layout.  I'm not referring to the actual traces but the lines that my CNC machine would etch out the copper during milling.  Problem is that the smallest endmill I have is a 1mm and when I go to process the G-Code, it fails because the etch lines are smaller than my endmill.  Any help would be very much appreciated!  Thanks!

 

image

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  • Former Member
    0 Former Member over 11 years ago

    Hello Nick Knack,

    It looks like you'll need to change the distance settings for when the copper pour/flood is generated.

    In the PCB editor you can go to Edit->Design Rules; select the 'Distance' tab in the window which opens.

    image

    Now if you set the value Copper/Dimension to 1mm and then 'OK', next re-pour your polygon and you should find 1mm gap has been generated.

    HTH.

     

    <edit> From the built in help:-

    "Isolate

    Distance between polygon areas and other signals or objects in the Dimension layer (default: 0). If a particular polygon is given an Isolate value that exceeds that from the design rules and net classes, the larger value will be taken. See also Design Rules under Distance and Supply, respectively. Note that if you give a polygon an Isolate value that exceeds that from the design rules and net classes, small gaps may result between the calculated polygon and objects belonging to the same signal as the polygon itself, which may lead to problems during manufacturing! It is therefore recommended to leave this parameter at 0, unless you know exactly what you are doing!"

    </edit>

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  • GRPZijlstra
    0 GRPZijlstra over 11 years ago

    Hello.

     

    The distance between the edge of the trace and the edge of the copper pour is the isolation parameter of the polygon you drew for the copper pour.

     

    Either change it using the Change icon, set isolation to whatever you need and click the polygon.

    Or right-click on the polygon, select properties and set the isolation to the width you require.

     

    Hope this helps,

    Guido

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  • velocity
    0 velocity over 11 years ago

    Hi guys,

     

    Thanks for the replies.  I went through and tried what you advised but all it does is thicken the trace and not the etched lines (the lines that show up black) -- which would be the lines that are milled by the CNC endmill (see image).

     

    image

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  • Former Member
    0 Former Member over 11 years ago in reply to velocity

    What version of Eagle are you using?

    Would you be happy to attach your .pcb file for me to have a look myself?

    ATB,

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  • Former Member
    0 Former Member over 11 years ago in reply to velocity

    Hi Nick.

    You must go back to the Width of the trace between C10 and R8, by use of 'Change' - Width - select a value. Then click the very thick tracks.

    The information you got should be 'Clearance', in tools - DRC.

    HTH

    Mogens

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  • GRPZijlstra
    0 GRPZijlstra over 11 years ago in reply to velocity

    That is weird. I made a few screenshots.

    image

    I made this simple board with some normal .016 inch traces. The dotted line is the plygon for the copper-pour (ground pour).

     

    I then hit the ratsnest icon to get the plygon filled using standard .016 inch isolation :

    image

    I then selected the polygon (either right-click -> properties or using the 'i' icon) and changed the isolate to 0.032 :

    image

    As you can see this should do what you need (unless the blue plane in your board is not done using a polygon with copper-pour, but it looks like it is).

     

    Of course, the distance between normal traces (not between a trace and a copper-pour/plane) is controlled by you if you route manually, or by the clearance parameter in the DRC settings when using the autorouter as Mogens indicated.

     

    Hope this helps,

    Guido

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  • velocity
    0 velocity over 11 years ago in reply to GRPZijlstra

    Thank you, Guido! (and everyone else as well) That was the ticket!  My issue was that I was right-clicking the properties for the trace and not for the polygon.  Once you showed me your screenshots, I figured it out and it works great now!

     

    Thanks so much!

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