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Making Complex Cutouts/Outlines

Former Member

I've never had a board made with anything other then round holes and the

finished pcb rectangular in shape.  I'm wondering how the board fab prefers

different shapes to be represented in the gerber.  Should a cutout such as

an elongated hole be drawn as a filled polygon?  I assume board outlines

should just be drawn as zero-width lines in the correct shape (same way I

draw rectangular board outlines).  Do board fabs generally charge more for a

specially shaped board even if it is just a rectangle with rounded corners?

Should both the cutouts and the outline be put into one gerber file?  How do

I indicate if the interior cutout should be plated through?

 

Thanks!

 

 

 

Parents

  • On 07/18/2010 03:28 PM, C H wrote:

    I've never had a board made with anything other then round holes and the

    finished pcb rectangular in shape.  I'm wondering how the board fab prefers

    different shapes to be represented in the gerber.  Should a cutout such as

    an elongated hole be drawn as a filled polygon?  I assume board outlines

    should just be drawn as zero-width lines in the correct shape (same way I

    draw rectangular board outlines).  Do board fabs generally charge more for a

    specially shaped board even if it is just a rectangle with rounded corners?

    Should both the cutouts and the outline be put into one gerber file?  How do

    I indicate if the interior cutout should be plated through?

    >

    Thanks!

    >

    >

    It is best to check with your board house. I have never done anything

    but rectangular board but monitor the groups.

    Outlines and slots go in the milling layer. Holes above a size are

    milled not drilled and Eagle seems to takes care of that.

     

    The DRC will keep plating away from the edger of board and holes on the

    milling layer so it may making a new layer for the plated cutouts

    milling. Then output it with notes to the board house that these are

    plated. Also expect a cost increase for slots and special handing.

     

    Paul R.

     

Reply

  • On 07/18/2010 03:28 PM, C H wrote:

    I've never had a board made with anything other then round holes and the

    finished pcb rectangular in shape.  I'm wondering how the board fab prefers

    different shapes to be represented in the gerber.  Should a cutout such as

    an elongated hole be drawn as a filled polygon?  I assume board outlines

    should just be drawn as zero-width lines in the correct shape (same way I

    draw rectangular board outlines).  Do board fabs generally charge more for a

    specially shaped board even if it is just a rectangle with rounded corners?

    Should both the cutouts and the outline be put into one gerber file?  How do

    I indicate if the interior cutout should be plated through?

    >

    Thanks!

    >

    >

    It is best to check with your board house. I have never done anything

    but rectangular board but monitor the groups.

    Outlines and slots go in the milling layer. Holes above a size are

    milled not drilled and Eagle seems to takes care of that.

     

    The DRC will keep plating away from the edger of board and holes on the

    milling layer so it may making a new layer for the plated cutouts

    milling. Then output it with notes to the board house that these are

    plated. Also expect a cost increase for slots and special handing.

     

    Paul R.

     

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