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Can you change the iteration time step in Creo Mechanism?

cadkins
Newbie

Can you change the iteration time step in Creo Mechanism?

Or is it only automatic?


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3 REPLIES 3

Re: Can you change the iteration time step in Creo Mechanism?

Not sure what you mean, but you can control timing with the advanced controls.

User defined servo motors, for instance, can combine several different time domains and actions throughout the duration you specify.

Re: Can you change the iteration time step in Creo Mechanism?

I mean when the analysis is running it's choosing a time step to measure a measure like position for example. I think Mechanisms uses a fourth order Runge-Kutta to solve the equations of motion of time?

In this example I've created a projectile ball and taken a measure of its y-position over time. You see from exporting the graph to excel; mechanisms has chosen a time step of 0.01 seconds from the first picture and then when it approaches the termination condition i set up, the time step changes to 6 decimal places (figure 2).

Do I have any control over this? Say i wanted the whole simulation time step to be 6 decimal places?

TimeStep1.JPG

Figure 1

TimeStep2.JPG

Figure 2

Re: Can you change the iteration time step in Creo Mechanism?

I see. I think it follows the analysis frames from some earlier tests I did.

This means you need to stretch your event if you want more steps due to the limit of the minimum step, probably .01 seconds.

I could be wrong, but I haven't been overly thrilled with the accuracy of mechanism.

The idea is that with interval points, you have unlimited interpolated data in the generated curve.

Unfortunately, Mechanism's precision is not very good. It truncates or rounds to very few digits.

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