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PICList Thread
'[OT] PCB Production'
1998\02\06@180224 by Steven J Tucker

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I have a few shareware/freeware PCB packages, but I've never had a board
produced and was wondering if and of you had any suggestions.  Once I
route the board, and have something that I can send to a PCB place, how
do I specify the stuff like where to cut the boards, and how close to
the edge the connectors need to be?

The software seems to great for routing and plotting, but I cant find any
functions to draw the boundries of the board.  Is this something that
is not normally part of a PCB package, and needs to arranged with the
people who will make the boards?

I really would like to be able to define the edges and holes to keep the
autorouter from using those areas where the board will be irregular.

Thanks!

Steve

1998\02\06@181056 by John Ellenz

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Steven,

If it is just a rectangular board that they are going to shear off you
could put dummy traces in the corners or around the outline and tell the
board house to shear along them.

A better way, and the only way if the board is going to be routed
instead of just sheared off would be to make a seperate board outline or
mechanical layer that shows the outline.  Send it to them as a seperate
gerber file.

When you send your gerbers you will always want to include a readme file
with names of the file for each layer specified.  In this file you can
specify which gerber is your board outline and give any other special
instructions.

John Ellenz

1998\02\06@183000 by Al Williams

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I usually put a rectangle on the silk screen layer that shows the boundary.
I'm usually too cheap to get our boards silk screened, so it seems like a
good place to put it.

Regards,

Al WIlliams
AWC
* Solderless Stamp and Pic Prototypes at http://www.al-williams.com/awce.htm
NEW! Free Stamp I Emulator for Windows

{Original Message removed}

1998\02\06@194834 by Rick Sherman

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Steven J Tucker wrote:
>

>
> The software seems to great for routing and plotting, but I cant find any
>  functions to draw the boundries of the board.  Is this something that
>  is not normally part of a PCB package, and needs to arranged with the
>  people who will make the boards?


I usually put the board outline on the mechanical layer gerber with all
of the
dimensions and other mechanical details.


> I really would like to be able to define the edges and holes to keep the
>  autorouter from using those areas where the board will be irregular.

All of the PCB packages I have used (PADS, PCAD & ORCAD) have some sort
of
keepout or barrier function for the autorouter to keep traces out of
areas
where you don't want them.
>
> Thanks!
>
> Steve

Rick Sherman KM6TI
spam_OUTrickTakeThisOuTspamvcc.com

1998\02\06@204816 by Reginald Neale

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>I usually put a rectangle on the silk screen layer that shows the boundary.
>I'm usually too cheap to get our boards silk screened, so it seems like a
>good place to put it.
>
>Regards,
>
>Al WIlliams

Most layout programs have a symbol that can be used as a crosshair or
target. Put one of those at each corner. Be sure to do it in each layer,
and check that the coordinates are the same.

Reg Neale

1998\02\07@044516 by Leon Heller

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In message <.....Pine.LNX.3.95.980206175812.12409B-100000KILLspamspam@spam@nacs.net>, Steven J
Tucker <classicsspamKILLspamNACS.NET> writes
>I have a few shareware/freeware PCB packages, but I've never had a board
> produced and was wondering if and of you had any suggestions.  Once I
> route the board, and have something that I can send to a PCB place, how
> do I specify the stuff like where to cut the boards, and how close to
> the edge the connectors need to be?

Just draw an outline using a track, or identify a pair of opposite
corners with two short tracks at right-angles. The board supplier will
shear the board along the lines.

>
>The software seems to great for routing and plotting, but I cant find any
> functions to draw the boundries of the board.  Is this something that
> is not normally part of a PCB package, and needs to arranged with the
> people who will make the boards?
>
>I really would like to be able to define the edges and holes to keep the
> autorouter from using those areas where the board will be irregular.


Leon
--
Leon Heller: .....leonKILLspamspam.....lfheller.demon.co.uk http://www.lfheller.demon.co.uk
Amateur Radio Callsign G1HSM    Tel: +44 (0) 118 947 1424
See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850
DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.

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