Author Topic: Clearance between round components  (Read 5193 times)

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Offline reagleTopic starter

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Clearance between round components
« on: November 25, 2013, 02:50:06 pm »
I am seeing something odd in my designs that I hope somebody can shed some light on. Whenever I create round components (say a testpoint) in Altium, the program considers it to be rectangular from DRC point of view. As a results I can't place two test points as close to each other as I should be able to.
Is there some trick to creating these, or maybe adding an outline on a particular layer to make Altium see them as round?

Offline toohec

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Re: Clearance between round components
« Reply #1 on: November 28, 2013, 07:43:06 pm »
You just need to add a circular 3D body to the top and bottom 3D body layers in the component's library footprint.  Use like a 1 mil high cylindrical extrusion that is the same size as the test-point pad.

FYI… If you don't have any 3D body information (like your current situation), then the component clearance is based off of the other primitives in the footprint and all the non-3D body primitives are basically treated as squares/rectangles.  If you add a 3D body, it will calculate component clearances solely on the 3D body and will ignore all other primitives in the part.
« Last Edit: November 28, 2013, 07:45:17 pm by toohec »
 

Offline reagleTopic starter

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Re: Clearance between round components
« Reply #2 on: November 29, 2013, 03:46:37 am »
Awesome, that makes sense- thank you very much! This will solve one long standing annoyance for me ;)


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