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[ptc-3142873]

I am using Creo Parametric Release 9.0 and Datecode9.0.11.0

Bonjour,
j'ai une pièce en tôlerie avec des formes en répétition (nombreuse). Sa mise en plan est très longue à s'afficher et son exportation en STEP par exemple est très longue aussi. Pouvez-vous m'aider à comprendre le problème ?
Peut-être faut-il ajouter une option au config.pro ?

Merci par avance pour votre analyse.

[tbraxton]

English translation.

I am using Creo Parametric Release 9.0 and Datecode9.0.11.0

Hello,
I have a sheet metal part with (numerous) repetitive shapes. Its drawing takes a very long time to display and its export to STEP for example is also very long. Can you help me understand the problem?
Maybe we need to add an option to the config.pro?

Thank you in advance for your analysis.

[tbraxton]

There is not enough information to reply with an answer that is meaningful/relevant. If possible, upload the part or an example of one with this issue along with the drawing. If you are not able to upload the files, then at least show some screenshots of the models/drawings and the model tree with enough detail for a review of the model structure to be made.

If you have a pattern in the model with many instances, this can require long regeneration times and also affect the speed of rendering. If you do have patterns, try optimizing them by using geometry patterns or the pattern regeneration options. Use the identical option if available.

About Pattern Regeneration Options

[ptc-3142873]

Bonjour,

Vous trouverez ci-joint les fichiers PRT, DRW, mon "config.pro" et mon "iso.dtl" afin que vous puissiez faire les testqs.

Merci par avance pour votre retour

Cordialement,

Bernard PROTHIN

  Tél. : 33 (0)6.73.28.26.92

  Fax : 33 (0)9.72.13.30.88

  Email : bprothin@becala.fr

  Web : www.becala.fr

[tbraxton]

I am confident that the issue is due to the method used to apply form1 and form2 features to the model. These forms are loading the CPU to make calculations for regeneration. I would try to make a form with single dimple and then pattern that form. I would make a flat plate to test this approach, it should help.

If I was tasked with producing a model for this design, I would try modeling flat surface with all of the dimples in part mode (not sheetmetal mode) and then convert the model to sheetmetal and add any additional features needed. If you build all of the dimples using surfaces and patterns and then thicken the quilt to make a solid it should regenerate very fast relative to what you have in your model. I would use a pattern of points to locate the position of each dimple (form shape) and then use geometry reference  pattern to add the required number of dimples to the flat surface.

[ptc-3142873]

Ce que je remarque surtout, c'est que le processeur travaille peu lors de la régénération de la pièce. c'est pour cela que je pensais qu'il manquait une option dans mon config.pro (ou autre fichier).

De mon côté, j'avais fait plusieurs tests mais sans être convaincu des différences relevées. Je veux bien avoir le retour de vos tests car j'ai une autre pièce similaire à réaliser prochainement.

[tbraxton]

The code in Creo used for regeneration of models does not support multi-threading. When you have a multi-core CPU it is not going to show the CPU being used at a high level as the regeneration is only done by a single core. Patterns are known to require a lot of CPU cycles to regenerate. Assuming that rendering is handled by a PTC supported GPU then the geometry render would be handled by the graphics card and you can mitigate rendering time with display settings.

If you need to model the part with a large number of forms, then I would find a way to deal with the creation and regeneration of that geometry in a model external to the sheet metal part. You can then reference this geometry in the sheet-metal part using Top-down design tools, so the form geometry is not regenerated while you are working on the design in sheet-metal mode. You can further optimize workflow by putting the forming geometry at the end or as close to the end of the model tree as possible so that you can keep it suppressed until it is needed for use on the drawing or in the construction of a feature in sheet metal mode.

To create the geometry of your forms (dimples) surface geometry will regenerate in the least amount of time. When creating a solid version, the use of the geometry pattern function can be used to array the surfaces and solidify them. There is also the option in sheet metal mode to use the quilt form and reference a quilt created in an external model that is optimized for a fast regen time. This reference feature (i.e. external copy geometry) can be set to read only so that it never regenerates which may reduce regen in some cases.

[ptc-3142873]

Merci pour votre retour, notamment concernant le CPU.

Effectivement, la position dans l'arbre est importante.

Je vais essayer plusieurs méthodes sur un prochain modèle pour optimiser la régénération.

Concernant les paramètres d'affichage, quels réglages me conseillez-vous ? 

Processeur Machine = Intel Core i9

Carte Graphique = NVIDIA RTX 4000

[tbraxton]

At a high level these are some items to test

Graphics Performance Settings:

• Set Graphics Mode to OpenGL
• Enable Hardware Acceleration in Graphics settings
• Reduce Anti-aliasing to 2x or disable it entirely
• Disable Ambient Occlusion and Reflections during modeling

Model Display Options:

• Set Edge Quality to Medium or Low
• Use Hidden Line or No Hidden display style instead of Shaded

• Enable Fast HLR (Hidden Line Removal) mode
• Reduce Edge Display Quality - set edge quality to "low"
• Enable Simplified Representations to suppress non-critical features
• Use Level of Detail (LOD) settings to reduce geometry complexity at certain zoom levels

https://support.ptc.com/help/creo/creo_pma/r11.0/usascii/index.html#page/fundamentals/fundamentals/to_improve_dynamic_display_quality.html# 

[ptc-3142873]

Merci pour ce complément d'information.