I'm not using the AutoPlacer solely.  It just seems to work ok to group the
more basic components (such as bypass capacitors for power supplys, I've got
about 5 different voltage levels).
I'm pretty much just running to get a decent spacing between the components
etc, then you can just select a group of components move them off the board
for a while whilst you shuffle the remaining components around, then place
them back in the desired place.  Doesn't seem to work too bad, although it
still requires a fair bit of shuffling.  With a test auto-route to determine
how well the traces can be routed.  If one area doesn't route too well, then
I just go back to the placement and change the ordering of the components a
little and then try again...
Then rinse and repeat...
Continuing until it doesn't bog down in the auto-route (suggesting the
layout is pretty cleanly placed).  Let the auto-router complete, then check
for dodgy routing (as ya do)...

I'm still learning... wondering if maybe other design packages have better
routing/placement routines on them, and why so little time seems to be put
into them...

Has anyone got any info on the suitability of Protel for relatively complex
(ie high speed digital) design simulation.  The kind where impedance
matching becomes important...

----- Original Message -----
From: "Steve Wiseman" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Tuesday, September 24, 2002 7:22 PM
Subject: Re: [PEDA] PCB component designator orientation


> 24/09/2002 02:10:16, "Bevan Weiss" <[EMAIL PROTECTED]> wrote:
>
> >This comes about through using the autoplacer
> >to obtain a starting point for component placement (just got too many
parts
> >to allow hand placement of every one).
>
> Wow - I've never got any use out of the autoplacer. (I generally just use
a room
> per schematic sheet, and use those as a startpoint - seems to get
results).
> The autoplacer just seems to chunter away to itself, moving components
> around, but not tending towards any result that I really want. What's your
> secret? (and on what kind of board?)

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