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LF_144658394-Participant
4-Participant
Jun 12, 2026 10:14 AM UTC
Question

Create a common datum out of two single datums in GD&T Advisor (ISO GPS)

We have defined three datums:

  1. A - a planar surface with a flatness requirement
  2. B - a single hole, perpendicular to A
  3. C - a slot

To account for the "ISO Bug" (Annex I in ISO 5459:2024) , we want to use the position tolerance (see red box) with a DRF of A|(B-C) instead of A|B|C.

But somehow Creo GD&T Advisor does not let us create that DRF via the “Establish DRF” functionality:

 

Is it possible to create custom DRF in GD&T advisor?

2 replies

LF_144658394-ParticipantAuthor
4-Participant
Jun 12, 2026 10:22 AM UTC

We are using Creo 9.0.9 as well as 12.4

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Catalina
CatalinaCommunity Manager
Community Moderator
Jun 16, 2026 12:28 PM UTC

Hi ​@LF_14465839 
 
Thank you for your question.  
 
Your post appears well documented but has not yet received any response. I am replying to raise awareness. Hopefully, another community member will be able to help. 

Thanks, 

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Catalina | PTC Community Moderator
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