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Size of drills, pads and via's

autodeskguest

I am a bit annoyed with the many different drill sizes eagle uses in the

libs and the very small pads/annular rings on the component layout. I think

they are generally too small.

 

 

 

I am thinking about changing the drill size and the pad size on the

components I use to standard drill size 0,7mm, 0,9mm, 1,0mm, 1,1mm etc., and

then change the padsize to something like padsize=3*dill size. I think that

rule is generally working ok.

 

 

 

But......

 

I have never had any PCB sent to PCB houses like Olimex etc. but I have a

few projects I would like to send out.

 

Are there any problems with this idea about changing drill and padsize that

could be a problem if I'm sending a design to a PCB house like Olimex? Are

there standard sizes for PADS's and vias that I have to use or any other

limitations? (I don't know how they make them)

 

 

 

Peter

 

 

 

 

 

  • On Sat, 22 Aug 2009, PA wrote to us saying :

    I am a bit annoyed with the many different drill sizes eagle uses in the

    libs and the very small pads/annular rings on the component layout. I think

    they are generally too small.

     

    They're generally too small for home etching, which is why there's a ULP

    to dump bigger pads on all holes. However, if you're sending the design

    to a professional board house, the library default sizes are generally

    the right ones for a properly built PCB.

     

    --

    Rob Pearce                       http://www.bdt-home.demon.co.uk

     

    The contents of this | Windows NT crashed.

    message are purely   | I am the Blue Screen of Death.

    my opinion. Don't    | No one hears your screams.

    believe a word.      |

     

  • "Robert Pearce" <news@bdt-home.demon.co.uk> wrote in message

    news:b5a4A3CzUEkKFwyk@daniel.huneausware.local...

    On Sat, 22 Aug 2009, PA wrote to us saying :

    I am a bit annoyed with the many different drill sizes eagle uses in the

    libs and the very small pads/annular rings on the component layout. I

    think

    they are generally too small.

     

    They're generally too small for home etching, which is why there's a ULP

    to dump bigger pads on all holes. However, if you're sending the design to

    a professional board house, the library default sizes are generally the

    right ones for a properly built PCB.

     

    But could there be a problem if I change the padsize?

     

    Olimex has specific standard drills that I like to use but Eagle has a lot

    of "strange" drillsizes in the libs, thats why I would like to change them

    to a standard size for the PCB house.

     

    I know the ULP, but in many cases I would like to change the shape also (fx.

    octo to round) so I change the drill, shape and size.

     

    Peter