Ground plane issue in merging of two board files in allegro

[jayasree jayaraj]

Hi,
I tried to merge two PCB's in allegro software. I export the subdrawing of PCB2 and import it in my PCB1 and make it as a single file. But when I import my PCB2 subdrawing(CLIP) file, all ground pins which is attached with ground plane lost its connection in PCB2.I have added a ground plane on top and bottom layer and all the grounds are connected to that. But when I merged two PCB files, the ground is missing in the imported PCB file. let me know what is the reason?

 

[jayasree jayaraj]

Hi,
I tried to merge two PCB's in allegro 17.4 software. I export the subdrawing of PCB2 and import it in my PCB1 and make it as a single file. But when I import my PCB2 subdrawing(CLIP) file, all ground pins which is attached with ground plane lost its connection in PCB2.I have added a ground plane on top and bottom layer and all the grounds are connected to that. But when I merged two PCB files, the ground is missing in the imported PCB file. I have done the merging of PCB in Allegro 16.6 version and there was no such issues. But it is not working in 17.4 version. let me know what is the reason?

 

[BigBoss]

Have you ever checked the NET name? in order to merge two (or more) copper pour plane, the NetNames must be same.

 

[jayasree jayaraj]

In PCB1 the net name of the ground is GND and in PCB2 the net name of the ground is BATT-. Is that the issue?

 

[BigBoss]

I guess..
Two different Power Planes with different net_names cannot be merged (logical).

 

[jayasree jayaraj]

I have changed the net names and made it the same for two PCBs. But still, all ground pins which is attached to the ground plane lost their connection in PCB2. when I merged two PCB files, the ground was missing in the imported PCB file.