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D__120073127-Bedrock
7-Bedrock
May 12, 2026 6:37 PM UTC
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ECAD-MCAD Collaboration - Should KOZs be drawn using circular references to connector geometry

When I use the IDX process to create a board with KOZs that stay 0.5 mm from my PCB’s connectors, should I create references to the connector geometry directly from my KOZ sketch that is within my board model? This would mean that I would be referencing a component that is in my PCBA model instead of only using internal references to the raw card (example: the raw card’s side and front plane). Are circular references an issue with .idx files?

tbraxton
tbraxtonAnswer
22-Sapphire II
May 12, 2026 7:51 PM UTC

Circular references are always undesirable in the Creo environment. Importing an .idx file should not create circular references (it may be possible if you do something really unorthodox). Rather than referencing components on the board in the sketch for the KOZ, use the ecad PCB component placement csys to control the geometry that needs to move with the component as the csys will be a datum feature in the Creo PCB assembly at all times and should not create a circular reference as it is the parent to the connector placement as well as a sketch reference for the KOZ.

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tbraxton
tbraxton22-Sapphire IIAnswer
22-Sapphire II
May 12, 2026 7:51 PM UTC

Circular references are always undesirable in the Creo environment. Importing an .idx file should not create circular references (it may be possible if you do something really unorthodox). Rather than referencing components on the board in the sketch for the KOZ, use the ecad PCB component placement csys to control the geometry that needs to move with the component as the csys will be a datum feature in the Creo PCB assembly at all times and should not create a circular reference as it is the parent to the connector placement as well as a sketch reference for the KOZ.

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