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Can I layout a circular pc board with Eagle

Former Member over 13 years ago

I reviewed the 2 Eagle videos by Jeremy and the board he designed was rectangular. I'm wondering if I could lay out a 3" diameter circular board with Eagle.

0 Nate1616 over 13 years ago

You should be able to. Use the mitter command and round the corners. so make the board square that is 3x3 and then mitter the corners.
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0 Former Member over 13 years ago

OK Thanks. I see someone made a nice round board here: http://www.element14.com/community/thread/18133?tstart=0
The person "created this in eagle with dimension layer round 114mm." Anyone know if this is a command in Eagle to simply set the dimension layer to round?
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0 RayA over 13 years ago in reply to Former Member

Rather than making a square board and rounding the corners 100%, I think you would just use the "Circle" command to place a circular outline in layer 20.
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0 Former Member over 13 years ago in reply to RayA

Thanks.

That's what I was hoping for. Your answer made me download the Eagle manual http://www.cadsoft.de/wp-content/uploads/2011/05/V6_manual_en.pdf and this is what it says on p148:
"The board outline can be drawn as a simple narrow line in layer 20,
Dimension with the WIRE command.
It's easily possible to draw round outlines, too. Therefore use the CIRCLE
command with a small width near 0.
You can also place a board contour from a library (such as 19inch.lbr) with
ADD.
A script file can, alternatively, be read by the SCRIPT command. The euro.scr
file, for instance, can be used. Simply type
SCRIPT EURO
on the command line.
The board outline serves simultaneously as a boundary for the autorouter or
Follow-me router (if present).
If your board has additional cut-outs, you should draw the necessary milling
contours in a separate layer, for example in 46, Milling. Use the WIRE
command with wire width = 0 to define your lines."
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0 RayA over 13 years ago in reply to Former Member

You're welcome, Joe.

One other comment is that I use a narrow line line, 0.003" instead of 0.000", for the board outline and milling cutouts. The reason is that the Eagle software will automatically provide a solid filll to any circles that have a zero width.
The boardhouse that I usually use cuts to the center of the line, so they don't care if the line is non-zero width.

Maybe someone with more experience can comment.
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