Creo 2.0 Measure Mechanism

[JeanMiguel]

Hi,

I am a student who needs some helps! I am working on a project of design/simulation on Creo. I am trying to simulate my system, which is the following:

Two blacks cylinders pull on the yellow part, which rotates relatively to green part. Yellow part pull on grey part so as to return it, thanks to blue parts. A load is applied between the two brown slabs (blue arrow=force). I want to know the force needed by the cylinders so as to return the vertical load applied between to brown parts. To do that, i created an analysis definition in which i apply the move i want (turn of the load).

Then, I created a new measure like this:

Connection_7 corresponds to the link between piston and cylinder. The goal is to know the force in this joint.

However, it does not work:

Firstly, when i want to simulate, i see this message:

Then, once i click ok, i cant see any graph and the measure results window is like:

I precise i applied gravity and materials to all components.

Can someone help me? i am a bit lost.

Thanks a lot

BR

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[unickque]

Have you had a good look at the output/log files?

There may be a reason why the measure is not computed. My knowledge of mechanisms is not so good, but I know from other software that if you do not constrain your mechanism correctly, sometimes the software adds or releases constraints. If your measure is on one of these locations, it may not be calculated.

In this case, the system may be 'overconstrained' due to using 2 cylinders. The software does not know how to distribute the load between the 2 cylinders. It may help to suppress one of them and then rerun the analysis. But this is just a wild guess, hopefully your logfiles will give some clues for a more educated diagnosis.

Offtopic: in reality the cylinders may also give a different force, and you may be misaligning your assembly. Something to think about maybe.

[JeanMiguel]

Thanks for your answer!

I have tried to delete one cylinder, but i have the same problem... And if i try to measure force on an other join, i have always the same problem.. It is really strange 😕

[unickque]

Have you also looked at messages in the log files?

[JeanMiguel]

What do you mean with nessage in the log files? How can i check it?

[unickque]

My knowledge on Mechanism is very limited, but if it is anything like its predecessor (Mechanica Motion) there should be a log file written to disk explaining about number of degrees of freedom, number of constraints, etc.

[JeanMiguel]

Actually there is a mechanism report which tells me:

I didnt find anything else...