Placing PTH on plane (pour) results in copper clearance check fails

[auxym]

If I place a mechanical PTH (in the board editor: place hole ->Circular PTH (Mechanical) on top of a plane (copper pour), the rule checks gives me two "PTH hole(s) on layer Top Copper - Bottom Copper near NPTH hole" failures.

It seems like maybe the mechanical NPTH holes don't create openings/clearances around themselves when the plane is rebuilt? Is there an option for that? Alternatively, is there a way to manually add cutaways / negative areas to planes/pours around mechanical holes?

Thanks

[carrotIndustries]

Hm, works for me. Have a sample project that reproduces this?

[auxym]

Thanks for the reply. Here is a quick project which reproduces the issue for me: https://github.com/auxym/pth-pour-test

In the board editor: Rules -> Run checks shows failures for me. I am running Horizon 2.7.1 on Windows 11.

[carrotIndustries]

The problem seems to be that the type of your "Circular PTH (Mechanical)" is set to "Mechanical" even tough it has copper. Setting the type to "Hole" and assigning a net fixes it.

[auxym]

Ah, understood. However, I'd like a PTH for mechanical reasons that is not electrically connected to anything. Is that possible? I thought it was somewhat common practice.

I don't mind defining a "dummy" net for each hole if that's necessary as a workaround, but I'm not sure how I can achieve that either.

[tkornack]

You can create a part that's just a single PTH with the symbol having a single pin. When you place it on the schematic you can leave it NC (no connection).

[auxym]

@tkornack yeah good idea, I'll probably just do that for the moment. Thanks.