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Component Clearance Constraint rule violations only when 3D bodies are removed?

nabelekt0

Hello all,

I have a design that I can run a Design Rule Check on and have it come back with no violations, warnings, errors, etc.

I have some components for which I change their footprints to versions that do not have the 3D body (for the sake of exporting a STEP model with them excluded, for components we're not populating on the board). When I do this and run the Design Rule Check again, I get some Component Clearance Constraint rule violations that don't make sense to me. The minimum clearance is set to 10 mil. And I see things like this:

image

What is it complaining about here? The nearest component is much more than 10 mils away.
Why do the violations only show up when the 3D bodies are removed?

Any help is greatly appreciated. Thanks!

  • 0

    No ideas on this?
    Is there no support at all from Altium or element14 in this forum?

  • 0

    Hi,

    This is community supported for help and is not part of Altium and element14 does not have dedicated help.  Unfortunately, there is not a lot of active support from users.

    Based on your information provided it is difficult for me to say what is the cause of the problem you are having.  I have noticed that sometimes the violations do not show even if there are violations unless something changes such as moving or changes to settings.  I haven't done much investigation since I have not needed to.  So, possibly removing the 3D bodies caused the DRC to recheck.

    What does using the SHIFT-V command tell you?  It should give some better indication of the specific violation.

  • +1 in reply to tarribred61

    Thank you for your reply. It's a shame that Altium/element14 don't seem to provide any sort of support to their customers. I guess another reason to move on from CS.

    I wasn't able to get the rule violations to appear with the 3D bodies in place, no matter how many times I ran the DRC.

    I was eventually able to figure out that for the case I showed above, tracks on the 3D Top layer of one component were to close to tracks on the Assembly Top layer of the component for which I had removed the 3D body. In another case, it was tracks on the Mechanical 10 layer of both components. In a third case, it was tracks on the Courtyard Bottom layer of the two components. I never have any use for these layers, despite many of my footprints having tracks in them, so wish I could tell the DRC to just ignore them.

    My hypothesis is: With 3D bodies in place, the DRC uses just those to evaluate adherence to the Component Clearance constraints. With the 3D bodies removed, the DRC uses all of the layers to evaluate adherence to the constraints.