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I am building a Model of a crankshaft drive and I want to trigger sertain events in respect to the crankshaft angle.

I fuigured out that I can add a sensor in form of a measurement, between the surfaces of the crankshaft and the bearings, wich gives me the crankshaft angle. I can then add an alert, when the angle reaches a specific value. This alert can be used as a trigger for an event wich should then accure while the crankshaft is moving.


All of this is gooing very well to the point where I want to define an alert at an angle greater than 180°

I would need the measurement go from 0° to 359° instead of just going from 0° to 180° and then switch directions.


I tried to use a Sketch wich i defined in the context of the assembly, and then adding a sensor wich is sensing the angle in form of a dimension. But the model isn't rebuilt during the simulation process as it it done in animation mode, so the sketch and thus the dimension of the angle never changes until I manually hit the rebuilt button.


I hope you get, what I mean and maybe somebodey has an answer to my problem.

Thanks for reading and best regards!

Categories: Simulation, Motion Studies

Last comment By: Amit Nara   Thu, 14 Sep 2017 03:58:01 GMT
Re: How can I use angles as a trigger for event Based Motion Analysis

I am not that much into Motion Analyses but I do have a suggestion.


Make a cylindrical dummy part at mate it to your crankshaft with a gear mate with a ratio of perhaps 1:10 or whatever is appropriate. Then set the trigger to this part. Perhaps you would need to make several triggers but again; how many revolutions must you have in your analyses?

Please let us know your progress and if possible upload your assembly. I - for one - would like to see this scenario.

By: Thomas Voetmann  Thu, 14 Sep 2017 04:34:08 GMT
Re: How can I use angles as a trigger for event Based Motion Analysis

You may use 2 Measurement Sensors. or may create an angular displacement plot and insert that value in expression. Please share model I will see that

By: Amit Nara  Thu, 14 Sep 2017 03:58:01 GMT
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