AW: [sdiy] Swapping copper layers in Eagle

[Tony Rolando]

I have needed to do something like this in the past. The problem I found 
is that surface mount parts are not swapped... so what you end up with 
is a lot of air-wires. The trace is swapped, but the pad is not. For PTH 
this is no matter, but SMT requires that you go back and mirror every 
resistor, cap and spin the part about so that it lands on the traces 
proper. Maybe there is a better way???

Tony

Ingo Debus wrote:
>
> Am 05.01.2009 um 18:44 schrieb Matthias Herrmann:
>
>> the thing is: there is actually a script for swapping layers. you 
>> could this
>> manually, as described by ingo.
>
> I almost suspected that. But this script doesn't come with the Eagle 
> package, does it?
>
>
>> HOWEVER, you would need at least one unused layer, and that is the 
>> crux. the
>> free eagle version provides only two signal layers, so there is no 
>> 3rd layer
>> to work with!
>>
>
> Argh! I thought you could use any layer for this purpose, but you're 
> right, this doesn't work.
> Working with Eagle for almost four years now, but it's still full of 
> mysteries... why aren't all layers created equal?
>
>
>> a workaround could be - i never tried this, though - to copy the 
>> board and
>> do it by deleting, copy/paste and layer swap actions: copy board, 
>> delete one
>> layer on copied board, other layer on original board, swap the left 
>> layers
>> for each board, copy and paste layer from copied board to original. 
>> right?
>
> I think so.
>
>
>> or just buy a registered version that supports 4 layers and run the swap
>> script...
>
> Or ask someone with a registered version to do that for you.
>
> Ingo
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