This is the first post with Altium tips and tricks. This is actually mainly a way for me to write to my scribbles on problems with Altium I have stumbled up-on and solved.
Tricky Footprint in Need of Larger Pads
For the Cart micro IEC I needed solder the male DIN 5 pin and male 8 pin DIN connector to the board.
The pins have a pretty large diameter and especially the 5 pin DIN has a relatively small pitch between the pins. This makes it difficult to have a large angular ring to get good soldering on. I have then opted for a wedge shape to get as big area as possible.
These footprints are med as a hole ( the actual pad ) and a copper polygon on the primary/top layer. This is also what creates a problem with false errors of short circuit.
When Altium reads in the setlist and a pad ( our hole ) gets a net connection and name it also attaches the copper polygon to the same net. If the pad/pin is not in the net list it will be shown as a short circuit between the pad/pin ( our hole ) connected to nothing and the copper polygon connected to nothing.
The solution is actually pretty simple. Add the ordinary “not used” ERC markers and add a dummy net name. A name like NC1, NC2, NC3, …
Here is the schematic where I have added that to one of the not used pins.
And on the layout one of the errors are now gone, the other remains.