Re: Eagle: via inside a pad, is it possible?

From: David M (dgmoodie_at_onetel.com.remooov)
Date: 12/08/04 

Date: Wed, 08 Dec 2004 11:24:36 +0000

Dmitri(Cabling-Design.com) wrote:
> Simon Pea*** wrote:
>
>
>>Depends.. its not can you put a via inside a pad but how is the board
>>getting built... if its automatically pick and place / wave etc.. then
>>no...
>>solder will flow down or up the via and tend to stand components
>>upright or
>>not solder them down properly. The only time its safe to use via in
>>pad is
>>if you use micro vias where the solder can't flow thru the via. Hand
>>soldering makes it easier because you can simply add more solder until
>>it
>>works.
>
>
>>Simon
>
> Simon, Boris, Thank you for your responses!
>
> I actually got more insight on the problem than I know what to do with ;-)
> I will be hand-soldering it for now, and will keep your comments in mind
> for the future if I have a chance to do a reflow on one of those boards.
>
> My question was (I think) simpler: I don't seem to be able to make Eagle
> pickup on the vias placed inside the pads; they just seem to be ignored by
> the router. I'm not sure if it's a principal problem, and vias are just
> not expected to be inside the pads or I'm just not setting the router
> correctly. Honestly, I would not even know which setting would I have to
> play with to make it recognize the vias.
>
> So, if an Eagle guru happens to read this, I'm still looking for a
> solution ;-)
>
> Thanks again!
>

there should be no problem doing this in Eagle, although it will flag up a
DRC error. If you are struggling to place it on the pad then the problem is
likely to be you grid settings. Change to a finer grid size, or use a fine
alt grid, such that the pad lies on the grid.

For access to all the Eagle gurus check out the eagle newsgroups, this link
on the cadsoft website should allow you to set things up.
http://www.cadsoft.de/forum.htm

The support groups are fairly active, and most of your future queries will
have come up at some time before so have a scan over the older meaasges if
you've got any other queries.

cheers

David

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