Requesting help from EAGLE PCB users

Started by June 5, 2006
Hi all,

I'm using the EAGLE PCB layout editor and absolutely love it.  It's so
much easier than other software I've worked with.  I am, however,
running into a problem with TQFP packages and the autorouter.  If I
bring in a TQFP package (e.g. PIC18F65J10) and a 8 pin header and make
8 random connections from the PIC to the header, and then go into the
"Board" mode and use the autorouter...it will not lay out the
connections for me.  However, if I take any DIL PIC package and mimic
the above steps, it works fine.

I'm new to EAGLE and I'm guessing it has to do with my net width?  I'm
not sure though and would appreciate any help in the matter.

Thanks, 
-weg

weg22@drexel.edu wrote:
> > I'm using the EAGLE PCB layout editor and absolutely love it. It's so > much easier than other software I've worked with. I am, however, > running into a problem with TQFP packages and the autorouter.
There is a newsgroup named 'eagle.support.eng' which you might try for help on this topic. Regards, Bodo
<weg22@drexel.edu> wrote in message
news:1149513189.753481.254310@u72g2000cwu.googlegroups.com
> Hi all, > > I'm using the EAGLE PCB layout editor and absolutely love it. It's so > much easier than other software I've worked with. I am, however, > running into a problem with TQFP packages and the autorouter. If I > bring in a TQFP package (e.g. PIC18F65J10) and a 8 pin header and make > 8 random connections from the PIC to the header, and then go into the > "Board" mode and use the autorouter...it will not lay out the > connections for me. However, if I take any DIL PIC package and mimic > the above steps, it works fine. > > I'm new to EAGLE and I'm guessing it has to do with my net width? I'm > not sure though and would appreciate any help in the matter. > > Thanks, > -weg
Sounds like you have your routing grid set to course for the TQFP. Try setting the grid to 1/2 the pin spacing of the TQFP. Also, Bogo's suggestion to try the EAGLE news groups is a good one. -- James T. White
On 2006-06-05, weg22@drexel.edu <weg22@drexel.edu> wrote:
> Hi all, > > I'm using the EAGLE PCB layout editor and absolutely love it. It's so > much easier than other software I've worked with. I am, however, > running into a problem with TQFP packages and the autorouter. If I > bring in a TQFP package (e.g. PIC18F65J10) and a 8 pin header and make > 8 random connections from the PIC to the header, and then go into the > "Board" mode and use the autorouter...it will not lay out the > connections for me. However, if I take any DIL PIC package and mimic > the above steps, it works fine.
You probably need to adjust the autorouter parameters (e.g. routing grid size, minimum trace width, etc.).
> I'm new to EAGLE and I'm guessing it has to do with my net width?
Net width?
> I'm not sure though and would appreciate any help in the matter.
That's what the cadsoft NNTP help groups are for. ;) -- Grant Edwards grante Yow! KARL MALDEN'S NOSE at just won an ACADEMY AWARD!! visi.com