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Tiny air wire scraps

autodeskguest

I seem to be plagued with numerous tiny air wires

on a board I'm trying to finish. These have the

appearance of being "embedded" in the pads of

SMD components. Ripping up and re-routing doesn't

get rid of them.

 

(But all of the copper trace connections seem to

be OK.)

 

I'm guessing that the library SMD parts I'm using

for some reason are not on the grid (??!!), but I

don't know any easy way to fix this. I've tried

using both metric and English measure -- didn't help.

 

SO, I have two questions:

 

1) If I just ignore these unrouted bits of air wires,

and go ahead and send the board out for manufacture,

might this come back to bite me later on?

 

2) Any way to avoid this, other than making my own

library version of every component?

 

 

And thanks in advance for the generous help on this

news group.

 

 

-lmc-

 

 

 

 

Parents

  • In article <g339ve$f45$1@cheetah.cadsoft.de>,

    "Larry Coyle" <lmcoyle1@verizon.net> wrote:

     

    I seem to be plagued with numerous tiny air wires

    on a board I'm trying to finish. These have the

    appearance of being "embedded" in the pads of

    SMD components. Ripping up and re-routing doesn't

    get rid of them.

     

    After ripping the trace up, start routing at the offgrid pad and route

    to an ongrid position.

    This way, the new traces will be centered relative to the pads and you

    get rid of these short airwires.

     

     

    I'm guessing that the library SMD parts I'm using

    for some reason are not on the grid

     

     

    2) Any way to avoid this, other than making my own

    library version of every component?

     

    Making new packages in an own library won't help. There are many

    packages with metric pin spacing (even through-hole components, e.g. the

    2mm Metral connectors), and these will always be offgrid when you use a

    grid based on inches.

     

     

    So use the correct routing technique and you won't have problems.

     

     

     

    Best regards,

     

    Günther

     

Reply

  • In article <g339ve$f45$1@cheetah.cadsoft.de>,

    "Larry Coyle" <lmcoyle1@verizon.net> wrote:

     

    I seem to be plagued with numerous tiny air wires

    on a board I'm trying to finish. These have the

    appearance of being "embedded" in the pads of

    SMD components. Ripping up and re-routing doesn't

    get rid of them.

     

    After ripping the trace up, start routing at the offgrid pad and route

    to an ongrid position.

    This way, the new traces will be centered relative to the pads and you

    get rid of these short airwires.

     

     

    I'm guessing that the library SMD parts I'm using

    for some reason are not on the grid

     

     

    2) Any way to avoid this, other than making my own

    library version of every component?

     

    Making new packages in an own library won't help. There are many

    packages with metric pin spacing (even through-hole components, e.g. the

    2mm Metral connectors), and these will always be offgrid when you use a

    grid based on inches.

     

     

    So use the correct routing technique and you won't have problems.

     

     

     

    Best regards,

     

    Günther

     

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