Again pad to close to pad

[Fabi]

Hello,
a few weeks ago I had an topic pad to close to pad which is closed now. I have to make an update to this topic. I have an layout with STM32 footprint
where the DRC makes no problems even if the red line touches next pad:

After this I made some changes to (Zone Clearance, Track Clearance, Net Clearance actually I reduced the values so that they shouldn’t change anything). This causes several problems in DRC

What could be the reason for this? What all affects the tolerated pad to pad clearance in DRC?

[eelik]

It can be clearly seen that clearance of the pads have been changed. Have you updated the footprint from the library? If you have set the footprint’s pad clearance on the board and then update the footprint, the old edits are overwritten. Or you may have changed the original values to larger and don’t remember it.

[Fabi]

The settings in the footprint are:

Its zero->it shouldn’t be a problem I think

[fred4u]

If footprint clearances are set to 0, netclass clearances are used. Check your netclass clearances (File > Board setup > Drc).

[Fabi]

Hallo, you write “have set the footprint’s pad clearance on the board”.
Where can I change the pad clearance on the board?

[eelik]

I meant the pad clearance of a footprint which is on a board. There’s no board-wide setting for that. For a footprint, just change the value which you show in your latest screenshot - measure the space between the pads and set the clearance =/< space.

[Fabi]

And there the worstcase net clearance of all nets connected to the chip is used?

[fred4u]

I’d assume that it depends on the network connected, and for unused pins the Default value is used.

[Rene_Poschl]

The same rules that apply to zones also apply fir pads.

[Fabi]

Hi, I hope now I have the last question concerning net clearances. What about the distance of an
zone to an via?

Where can I change this?
GND zone has clearance 0.15 and RXCan also. But it makes an clearance around the via with 0.2mm.
What clearnce uses the via?

[Rene_Poschl]

Vias use the same clearance rules as tracks. So either you measured wrong (the clearance looks the same size in your screenshot), forgot to recalculate the zone after a via size change or there is a bug somewhere.