Learning Forum

[javat33489]

Hello everyone, I'm getting the TIMSTEP IS TOO SMALL error in ANSYS MOTION when I run a calculation.
I have the following mesh:

The second element, which rotates the shaft, is a rigid body.
I'm using the following settings:

Why does this error occur?

Thank you.

[Ankush Choudhary]

Hi,

This is a general error that can occur due to multiple reasons. Please check out the solver output file; there you will find the reason and recommendations to resolve the errors. You can also try reducing the maximum step size.

[javat33489]

Yes, sir, I understand.
I've also used all the necessary general knowledge on this issue. But it doesn't go away.
I'd like to point out that I've increased the minimum time step, damping, and stabilization:

But I always get an error when Multi Point is enabled in the contact settings:

If I use Surface, the problem is solved. But I want to understand why it doesn't work with MultiPoint.