topic Re: From one layer to two layers in EAGLE Forum

From one layer to two layers

Anonymous — Fri, 12 Jan 2018 10:06:29 GMT

Hello folks, I have a single layer PCB project already finished and tested. I realized that for one side PCB pads and tracks would be easely destroyed during the components soldering due to the natural fragility of single side pads. The solution is change from one side to two sides but keeping all routes already done in the bottom side and just duplicate all pads from bottom to top layer. After the holes metalization linking top and bottom pads the componentes soldering certeinly will be more secure... The problem is how to create the top layer with only the pads copied from the botton layer ? Thanks for any help.

Re: From one layer to two layers

rachaelATWH4 — Fri, 12 Jan 2018 11:01:53 GMT

@Anonymous wrote:

Hello folks, I have a single layer PCB project already finished and tested. I realized that for one side PCB pads and tracks would be easely destroyed during the components soldering due to the natural fragility of single side pads. The solution is change from one side to two sides but keeping all routes already done in the bottom side and just duplicate all pads from bottom to top layer. After the holes metalization linking top and bottom pads the componentes soldering certeinly will be more secure... The problem is how to create the top layer with only the pads copied from the botton layer ? Thanks for any help.

Hello,

Open up your DRC settings and go to the Layers tab. Now in the Settings field change this to say (1*16). This will add the bottom layer. The brackets also define a through via in case you need to add any at some point. You can omit the brackets if you wish, it'll make no difference now. Click "Apply" and then you can close the DRC dialog. Any through hole parts you have placed should now automatically have pads on the other side of the board.

Now, I guess you are wanting your traces to be on the bottom so you can group all the traces and issue a CHANGE LAYER 16 command and apply that to the group and it will move your traces to the bottom layer.

Best Regards,

Rachael

Re: From one layer to two layers

Anonymous — Fri, 12 Jan 2018 11:46:19 GMT

Thanks Rachael, but I could not find where I define the part pins as through holes... Any idea ?

Re: From one layer to two layers

rachaelATWH4 — Fri, 12 Jan 2018 12:07:43 GMT

@Anonymous wrote:

Thanks Rachael, but I could not find where I define the part pins as through holes... Any idea ?

How have you created your parts? If you have standard through hole part definitions, then the PAD elements used to define through hole pads (vs the SMD elements used for surface mount pads) will automatically be put on every layer of the PCB. If this in not happening then it might be helpful if you could share your design files on here.

Best Regards,

Rachael

Re: From one layer to two layers

Anonymous — Fri, 12 Jan 2018 12:44:23 GMT

Rachael, look at attached file. I've used only standard libraries on it... Thanks a lot for help...

Re: From one layer to two layers

rachaelATWH4 — Fri, 12 Jan 2018 13:00:39 GMT

@Anonymous wrote:

Rachael, look at attached file. I've used only standard libraries on it... Thanks a lot for help...

Hello,

I'm not sure what you are expecting to see which isn't there but it looks fine to me. You have regular through hole pads and when the Gerber files are generated (assuming you use a correct 2-layer CAM setup) these will be on the top and bottom layer with through plating between them on the final PCB.

The only issue I see with this board is you do not have the board outline defined on the dimension layer (layer 20) which is required but you do have this drawn on the bottom layer along with some measurements. These will cause DRC errors when you have the proper board outline drawn in. You should remove these and put the measurements on the Measures layer.

Best Regards,

Rachael

Re: From one layer to two layers

Anonymous — Fri, 12 Jan 2018 13:20:54 GMT

Geee..... You are correct !!! I was trying to see the contents of layer 1 (top) using the Eagle ... Actually layer 1 (top) does not have anything. Now with a gerber files viewer all pads appears. Thanks a lot.