Thursday, January 14, 2016

Hole to Hole Clearance Rules

AD16 has options to use Drill Pairs for hole to hole clearances.

Click on images to view




















In AD16.0.6 the drill pair rules are not working properly. Hole to Hole Clearance violations are not properly reported.

Also there are backward compatibility issues with using the drill pairs in AD16, they are not recognized in earlier versions of Altium. 

When the DRC check is run in an earlier version you will get this error message.
















Select Cancel.

Workaround for hole to hole clearance checks.

The solution shown below works and is backward and forward compatible.

Example 1: The rule shown below will catch both same net and different net hole to hole violations for holes greater than or equal to 6 mils in diameter.









(AsMils(HoleDiameter) >= 6)  



Example 2: The rule shown below will catch both same net and different net hole to hole violations for any hole less than 6 mil in diameter.






















(AsMils(HoleDiameter) < 6)  

























Example 3: Via to Via Clearance Rule, 























The edge of hole to edge of hole distance will be determined by the clearance rule and the annular ring sizes of the adjacent vias. 

For 8/18 vias use 5mil via to via clearances to create Hole to Hole 15mil clearances. 

Any Net was selected to apply the rule to both same and different nets.

That's It !

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