Eagle Cad and avoiding through holes under certain component

Community PCB Design
1

I’ve done a few single sided boards in Eagle and have successfully routed them on my CNC router. I have avoided double sided boards until now…

I have a board with two sides and I use the autorouter to layout the traces. It puts traces on each side and puts the through-holes (vias?) on component legs. This will work fine for some components where you have access to solder both sides (resistor) but not for things like terminal connectors or pin headers where you only have access to the bottom for soldering. How do I tell eagle not to put a through hole under certain components?

thanks!

2

Type “help layer” on the command line and you can get a summary of the different layers.

Here are some that may be of interest to you (especially layer 43):

39 tKeepout Nogo areas for components, top side

40 bKeepout Nogo areas for components, bottom side

41 tRestrict Nogo areas for tracks, top side

42 bRestrict Nogo areas for tracks, bottom side

43 vRestrict Nogo areas for via-holes

You would create a polygon on layer 43 in the area where you do not want via’s and the autorouter will stay out of it.

-Bill

3

phalanx:
Type “help layer” on the command line and you can get a summary of the different layers.

Here are some that may be of interest to you (especially layer 43):

39 tKeepout Nogo areas for components, top side

40 bKeepout Nogo areas for components, bottom side

41 tRestrict Nogo areas for tracks, top side

42 bRestrict Nogo areas for tracks, bottom side

43 vRestrict Nogo areas for via-holes

You would create a polygon on layer 43 in the area where you do not want via’s and the autorouter will stay out of it.

-Bill

thanks…works…I needed to use layer 41 though…