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'[EE]:Eagle Layout help'
2002\05\14@103740 by Hazelwood Lyle

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Hi,
Thanks to all for the discussion on Eagle.
I'm just learning it, and have gained something
from every posting.

How can I get a Hole Count from the PC board
for cost estimating purposes?

Are there any "Gotchas" that I should look
out for before submitting my design for
production?

TIA,
Lyle Hazelwood

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2002\05\14@111847 by Bob Ammerman

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----- Original Message -----
From: "Hazelwood Lyle" <spam_OUTLHazelwoodTakeThisOuTspamMFGNC.COM>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Tuesday, May 14, 2002 10:34 AM
Subject: [EE]:Eagle Layout help


Hi,
Thanks to all for the discussion on Eagle.
I'm just learning it, and have gained something
from every posting.

How can I get a Hole Count from the PC board
for cost estimating purposes?

--- run count.ulp

Are there any "Gotchas" that I should look
out for before submitting my design for
production?

--- run DRC with rules that match your boardhouse's requirements (preferably
stricter ones!)
--- check physical sizes of components vs. layout. I like to print a 1:1
check print and make sure the parts will really fit.
--- put text on both sides of board to avoid 'flipped' layers
--- and, I am sure, many more

Bob Ammerman
RAm Systems

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2002\05\14@111902 by Lawrence Lile

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Aha! Lyle, it looks like you haven't discovered the SECRET FILES that go
along with Eagle.  No doubt you have heard of eagle's ULP and Script
capabilities.  Both of these are user-extendable programming languages that
allow people to add functions to Eagle.

One of the ULP's I use is called DRILLPLAN2_0.ULP, and the other is
DRILLCFG.ULP.  Together, they count up all your holes, and create a nice
drill plan on your drawing showing the symbol for each hole size, the count
for wach hole size, and the total number of holes, and make an excellon
drill file.

The ULP's I use on every single job are:

Smashall  (makes it so you can move the part names separately from the
parts)
Auto-Dim  (there are several names for this one, automatically dinensions
the board)
drilplan2_0  (makes a drill plan on your board layout)
drillcfg (makes an excellon drill file)
dxf.ulp  (makes a DXF out of Eagle for autocad import and printing)

in that order.  Check out the user download area on the Eagle site, there
are dozens of useful ULP's.  Eagle is really not complete without at least
this minimum list of ULP's.

-- Lile

{Original Message removed}

2002\05\14@112237 by Olin Lathrop

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> How can I get a Hole Count from the PC board
> for cost estimating purposes?

One way is to export a drill info file and see what it says.


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

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2002\05\14@113720 by Lawrence Lile

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Go to your board house's web site, and look for a document that states their
design rules and requirements.  Mostly this will be a laundry list of things
they constantly have to complain about because they are common mistakes.  I
wnet to several board houses and compiled a little book of them over the
years, to use as a design guide.

These will include:
minimum spacing from holes to edge of board
Minimum trace-to-trace spacing
minimum trace width
minimum SMT to SMT spacing (more of a concern for assembly than board etch)
Minimum SMT to DIP spacing  (ditto)
limits on number of corners on the edges of the board (sometimes 4,
sometimes extra charge for more, sometimes not)
Customer name, part number, and revision number embedded in the Gerber CAD
file
Unique filename for each gerber revision

In addition, add your own ideas, such as:
Fatter traces than necesary to facilitate hand soldering
Your part number and revision in copper on the board
Extra clearance around mounting holes for screwdrivers
Ground planes

You can go on and on with this sort of thing, and there are as many
standards as there are designers.  Most houses are very good about putting
your job on hold if there are any questions.
>Are there any "Gotchas" that I should look
>out for before submitting my design for
>production?

TIA,
Lyle Hazelwood

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