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PCB Layout tool is changing my through-hole pad size of my library part

joelcrouch

I built a 6-pin through-hole straight header component with a pitch of 1.27mm using a hole size of 0.70mm(0.028").  However, when I import it into PCB Layout tool, the tool resizes the pads around holes, and now I get clearance errors when I run DRC check.  The only way I found to get rid of clearance errors is to reduce hole size to 0.02", but now I get hole size error not to mention that part will probably not fit now.  How can I fix this problem?

 

Thanks,

Joel

  • 0

    Op Sun, 04 Nov 2012 16:34:50 +0100 schreef Joel Crouch 

    <noreply-143196@element14.com>:

     

    I built a 6-pin through-hole straight header component with a pitch of 

    1.27mm using a hole size of 0.70mm(0.028").  However, when I import it 

    into PCB Layout tool, the tool resizes the pads around holes, and now I 

    get clearance errors when I run DRC check.  The only way I found to get 

    rid of clearance errors is to reduce hole size to 0.02", but now I get 

    hole size error not to mention that part will probably not fit now.  How 

    can I fix this problem?

     

    Thanks,

    Joel

     

     

    Hello Joel,

     

    The 'pads around the hole' are called restring (rest-ring) in Eagle speak. 

    When building your part you probably defined the pad size as 'auto'. Now 

    the Design Rules Check (DRC) modifies the restring according to the rules 

    defined there.

     

    You could explicitely define your pad size in the library and you should 

    probably read up on the DRC setting in the help, to see how they influence 

    these parameters.

     

    HTH

     

    Richard

     

  • 0 in reply to Former Member

    Hey Richard,

    Nope.  I do not have pad size set to auto in LIbrary.  PCB Layout is just overriding the way I defined the part in the library.

     

    Thanks,

    Joel