How to add a constraint on SimMechanics

Hi guys I'm modelling a rotor (Brushless motor + propeller) and a plane with simMechanics where I add a rotation + thrust force for a time then I apply no more... The idea is that the rotor will raise for a certain altitude then fall. The problem is that the motor fall forever (Passing through the plane)... I've tried to use the constraint block but when I simulate I got an error on the solver "Singularity issue"

Do you guys know a better way to limit the translation extension of this cylindrical joint? I've heard about the hard-stop but I could not understand it well and I'm not certain that this is the better way.

[Leonardo Araujo]

Here is the video of the current simulation http://www.youtube.com/watch?v=SP8jdQA3knE And the scope view

Answer 1

[Ibrahim SAT]

hello, ı try to control ballbot robot by using simmechanic. ı moved 3D model matlab simmechanic from solidworks. but ı dont know how ı will control it. Should you make suggestion to me pls. ı watched some simple videos on youtube. also ı am glad ıf you can share a aducation video ıf you have. thanks