Autodesk Inventor

[#1]

I have a part file. About 3 Mb in size. Not to large.

It is running quite slow. I have produced a rebuild all.

Not to sure on why its so slow.

Any comments please.

[#2]

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paul.coleman wrote:

Any comments please.

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Yes,  I have a comment - Roll up the EOP, zip and attach here.

[#3]

Hi JD

See attached.

The surfaces at the top have adaptivity assigned to them and cannot be switched off for some reason as well.

Regards

Paul

[#4]

JD

I have a feeling it might be the option for the mirroring of thicken features. The default is identical. But have just realised this is not the best option for compute purposes. Optimised is the best option for faster computing. 

I'm just guessing at this stage.

 

[#5]

Well, I took a few minutes to look at this and I cannot see any advantage to adaptivity in this.

I would model this quite differently, but it would take several hours to demo.... .... so out of luck on that.

I love multi-body, but I don't think I would model this entire assembly in one ipt.

I would avoid adaptivity and look into a combination of Derived Components (accomplishes the same thing as adaptivity in a more robust fashion), Frame Generator and multibody of some subs in this assembly.

I cringe whenever I see Move Face.  There is a time to use, but very rare in my opinion.

[#6]

I just took another look and it also occured to me that there is no point of mirror parts in multibody if the mirrored parts are simply copies of the original.  (not truelly mirror as in your left hand vs right hand, but simply the same part on the other side)  Same with the duplication of any parts.

Push the parts out to assembly end mirror the components in the assembly.  Your assembly has a lot of symmetry, so this alone should dramatically reduce the size of the master ipt.

My first impression was that this was all a pretty complicated multi-body.  But when I looked at it again I realized that is actually a pretty simple design with simple geometry parts and a lot of symmetry.  Use advantage of that.

[#7]

Took a third look and I can't find a single part that is a true mirror (in the sense that your left hand is a compliment of your right hand, not simply a duplicate).  I would do one of each and push out parts (Make Components) to assembly.  Finish the assembly with components.

[#8]

The thing is, the file really isnt that large.

I'm not to sure why it runs so slow.

Also, unable to turn some of the features adaptivity off.

[#9]

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paul.coleman wrote:

I'm not to sure why it runs so slow.

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The only thing I can figure is it must be the Adaptivity as it runs fine on my old 32-bit laptop with 2G RAM ( I created additional parts and edits at normal speed).  Because I don't have the file it was adaptive to it isn't referencing that link.

I very very very seldom use adaptivity and I would not duplicate parts in a multibody.

[#10]

Hi! There might be something else at play here. I open the part on R2011 RTM on 32-bit XP with 3GB RAM. I am not seeing the poor performance. Edit, Update, and Rebuild All all perform reasonably well (within 2 or three seconds).

I do agree with JD that the modeling technique you use might not be the best way to design an assembly. But, I think there are advantages of doing so. The adaptive flag issue should not affect the performance. Basically, Shared Sketch and Adaptive Sketch should be mutually exclusive. However, there is a faulty logic resulting in a Shared Adaptive sketch, which you cannot turn off Adaptive flag.

Do you mind recording a video showing the poor performance behavior?

Thanks!