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Override at Footprint Level

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Product Suggestions
Forum Description: request new features
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=2104
Printed Date: 30 Oct 2025 at 5:33pm


Topic: Override at Footprint Level
Posted By: craig4tone
Subject: Override at Footprint Level
Date Posted: 07 Mar 2017 at 1:23pm
We'd like the ability to override the rules at the footprint level.  For example, on QFN's, we prefer the round hollow circle on the assembly layer that correlates with the recessed circle in the package for polarity to make it easier on the SMT assembly house to identify.  But when the QFN gets small (~4mm square), we don't have room for a hollow circle and would prefer to use a corner chamfer in those cases.  

It would be nice if preferences were set so they apply to 95% of the cases and then can be overridden at the individual footprint level for the 5% of cases.


Replies:
Posted By: Tom H
Date Posted: 25 Mar 2017 at 8:27am
You can do this right now with the current release on a part by part basis.

Are you saying that you want to save some manually set preferences in the FPX file?

Manually inserted Polarity Markings are already saved to FPX.

Can you explain in more detail what you are referring to?



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Posted By: craig4tone
Date Posted: 29 Mar 2017 at 5:27am
By default, we do not include polarity indicators on assembly outline since we use a hollow circle for 95% if cases.  In the case I have a small body part where the circle becomes too ambiguous to define a corner, if I go into the part in my FPX library, go to Drafting -> Assembly and check "Include Polarity Indicators" and then click OK, it adds the chamfer to the assembly outline.  I then Add to Lib to update my existing part.  If I view another part and then go back to that part, the assembly outline is no longer chamfered.  It allows it to be done but does not seem to save that unique setting on a per part basis even though what I wanted was correct in the Editor window.

Posted By: Tom H
Date Posted: 29 Mar 2017 at 7:58am
Assembly Outline Chamfer is a Preference and Preferences are currently not saved to FPX.



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