I am a footprint designer noob. I am using Kicad v5.1.9. I have made 20+ schematics and PCBs and had them manufactured. So not a complete noob!
On a number of my PCBs I have a edge connector which is 52 pads by 3, where each group of 3 pads are connected together.
Originally I modified a conn_01x40 symbol to make a conn_01x52 symbol. I then placed this 3 times in the schematic. I then had to manually route the connection from pin 1 to pin 1 to pin 1 and then to the circuit. I modified the 01x40 footprint and extended it. In layout I get 3 conn_01x40 footprints. Again in layout I get the 3 connector footprints and then I have to manually wire pin1 to pin1 to pin1. I also make the same connections both sides (this causes problems with wire rip up in the latest tool so I have to use legacy mode).
I decided, enough is enough this is too much work. In the schematic I will instance only one of my 52 way connectors. So I no longer have to make 104 connections to connect to the other 2 connectors.
I modified the 52 x 01 connector by copying pad1 twice and placing them side by side. So each “pin” on the symbol maps to 3 through plate holes. I now needed to connect each set of 3 pads together. I used “graphic lines” and connected the 3 pads on both front and back copper. When loaded into the layout tool, I had problems and finally realised that the front and back copper wires in the pad apparently had a “keep out” attribute". I had no idea how to remove it.
So I searched and found a YouTube video. It explained how to make unusual shapes by copying the pad and slightly moving it (SMT). So I removed the “graphic lines” front and back copper links. I copied one of the pads and changed it to SMD (to remove the hole) and resized and moved it to link the pads.
In layout although this looks OK in the 3D viewer, I can see that layout wants me to wire the52 sets of 3 pads together. I can see the rats nest white lines. All these connections fail in DRC. I really would like this footprint to be DRC clean in order to spot the other missing connections.
I need advice as to how to make the footprint tool see the collection of 3 through plates holes and the 4 linking SMD pads as one “super” pad.
I have attached a picture from Footprint Editor and the same footprint in PCB Layout Editor.
I would be grateful; for any advice or pointers.