I was curious to know how is the thermal spoke orientation determined for the zone connect and if there is a setting at the pad level (or elsewhere) to select between 45-degree angle and straight spokes.
In my design I found that there is both orientation for the same zone for 2 different connectors/pads:
45 degree angle spokes
I came curious as I want to control the orientation for a specific connector (from 45-degree to straight) but haven’t been in luck to find out how.
It does not carry much current (it’s a debug connector) so I wanted thin spokes to be able to install it without too much heat dissipation from the ground plane. Unfortunately, 45-degree angle thin spokes (< 0.3mm) wouldn’t pour over the pad, changing the zone settings would result in uneven copper shape (again, see right pad):
Found this post after searching for an explanation for spoke orientation in:
I do not agree with Rene’s remark of:
For “oval” pads the thermal spokes could easily origin from the centers of the arcs instead of from the center of the pin.
But overall it’s not very important for me. When Zone connection may become a problem It’s usually for a small number of pads and those can be easily handled by using not thermal spokes at all and drawing a few track segments that fit that particular situation.