Molded Body 3D STEP Model Issue

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   When I look at a STEP file for a molded body exported from Footprint Expert, I'm seeing issues with both pins on the part. 
It looks like the top part of the pins can't properly solidify. 

I'm seeing this anomaly in OrCAD and E-Drawings.  

If I export a STEP file with just this one part on the board in OrCAD, it fails when trying to import into CREO (MCAD software).

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rrix Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 10 Jan 2018 Status: Offline Points: 34	Post Options Post Reply Quote rrix Report Post Thanks(0) Quote Reply Topic: Molded Body 3D STEP Model Issue Posted: 17 Aug 2023 at 11:08am
	When I look at a STEP file for a molded body exported from Footprint Expert, I'm seeing issues with both pins on the part. It looks like the top part of the pins can't properly solidify. I'm seeing this anomaly in OrCAD and E-Drawings. If I export a STEP file with just this one part on the board in OrCAD, it fails when trying to import into CREO (MCAD software).



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 17 Aug 2023 at 11:26am
	The master 3D STEP model was designed for the JEDEC DO-214 package. Major Note: The "D" dimension must be at least (minimum) 0.80 mm larger than the "D1" dimension. This allows the 0.20 mm thick terminal lead to exit the package and have a bend radius. There are some Molded Body packages where the terminal lead is against the package body. This is a non-standard package and it's not recognized by JEDEC, EIA or IPC. You need to use the FP Designer module to create these non-standard footprints using the mfr. recommended pattern. And get the 3D STEP model from the component mfr.
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rrix Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 10 Jan 2018 Status: Offline Points: 34	Post Options Post Reply Quote rrix Report Post Thanks(0) Quote Reply Posted: 17 Aug 2023 at 11:59am
	Understood. Request you consider this as a possible enhancement for the future. I know the manufacturer's don't always follow the standards, but it's what we have to deal with (and they don't always have a STEP file and then we would have to generate one manually). Also, would it be possible to provide some indication that the 0.8mm requirement was being violated? That way I would know there's an issue right away. I do a quick visual check, but don't normally zoom in to check all the geometry of the STEP file. I only found this since my MCAD team was complaining about it. Thanks for the reply. I'll try to keep this in mind when creating a molded body part.

Jeff.M Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 16 May 2012 Location: San Diego Status: Offline Points: 477	Post Options Post Reply Quote Jeff.M Report Post Thanks(0) Quote Reply Posted: 27 Sep 2023 at 10:05am
	Added an error provider to flag any D1 value is greater than D minus twice the minimum terminal thickness of 0.3mm (D - D1 must be greater than 0.60 mm).
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Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 27 Sep 2023 at 11:04am
	Note: Footprint Expert 3D STEP models are not 100% compatible with CREO (MCAD software).
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