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'[OT]: Round board in Eagle, anyone?'
2002\12\03@091600 by Chris Loiacono

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I am working on a round board and have been trying to find ways to either a)
create a round board outline, or; b) set a round area for the autorouter to
work inside. Either way, I can end up with a round shape. Does anyone know
the best way to accomplish this?
TIA,
Chris

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2002\12\03@100525 by Sid Weaver

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Good morning, Chris

I got a circle in Ivex by drawing four successive 90 deg. arcs in a CW
direction.  Does Eagle have an arc capability?

Sid

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2002\12\03@103302 by Francisco Ares

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Once I did something like that, placing LEDs in a round shape, in an old
DOS version of TANGO.

I just started a simple board, placed some itens on it and hacked the
file to figure out how lines and pads were coded, and then I build a C
program to create a new board file with the LEDs placed and also with a
segmented circular outline.

Francisco


Chris Loiacono wrote:

{Quote hidden}

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2002\12\03@120645 by Florian Voelzke

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Just draw a circle on the dimension layer. But do not choose the line
width 0 or eagle will draw you a filled circle.

If you want to place components in a circular manner, I recommend using
the command syntax (from a script or the command line of eagle). Then
you can place a component on the exact point you need: "move t6 (10.47
18.65)".

Chris Loiacono wrote:
> I am working on a round board and have been trying to find ways to either a)
> create a round board outline, or; b) set a round area for the autorouter to
> work inside. Either way, I can end up with a round shape. Does anyone know
> the best way to accomplish this?
> TIA,
> Chris

Florian

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2002\12\03@121859 by Chris Loiacono

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Thanks, Florian.

> Just draw a circle on the dimension layer. But do not choose the line
> width 0 or eagle will draw you a filled circle.

Will this be interpreted as a board ouline or autorouter limits?

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2002\12\03@123154 by Florian Voelzke

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Chris Loiacono wrote:
> Thanks, Florian.
>
>
>>Just draw a circle on the dimension layer. But do not choose the line
>>width 0 or eagle will draw you a filled circle.
>
>
> Will this be interpreted as a board ouline or autorouter limits?
>

AFAIK both, because the board outline is always an autorouter limit.

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2002\12\03@141026 by Josh Koffman

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You should be able to draw a circle in the Eagle board editor. Then you
could use restrict and keepout layers I think. Or, what about drawing a
circular copper trace on the top, and the bottom (assuming a double
sided board). Then place all your components inside the circle. When you
autoroute, it won't be able to place a trace that crosses the copper
circles, nor will it have need to, as everything will be inside.

Josh
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Chris Loiacono wrote:
> I am working on a round board and have been trying to find ways to either a)
> create a round board outline, or; b) set a round area for the autorouter to
> work inside. Either way, I can end up with a round shape. Does anyone know
> the best way to accomplish this?

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2002\12\03@154350 by William Chops Westfield

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   I am working on a round board and have been trying to find ways to
   either a) create a round board outline, or; b) set a round area for
   the autorouter to work inside. Either way, I can end up with a round
   shape. Does anyone know the best way to accomplish this?

Circles in Eagle seem to have a hack where setting the line width to zero
results in a filled circle rather than just an outline, but I think I had
success simply by putting up with the relative ugliness of using the
smallest non-zero line width for a circle in the dimension layer.  I don't
recall whether I tried to autoroute or not, but it ought to work - as far
as I know the only think stopping the autorouter from crossing objects in
the dimension layer is the design rules, so the actual shape shouldn't
matter.  (Someone suggested multiple arcs.  That sounds like it would work
too. I'll have to try it!)

BillW

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