I did small research for that but I couldn't find similar problem. sorry if answer exist somewhere here.
I tried spin very simple assembly from two parts in motion analysis with gravity and gear mate, but didn't worked.
When I tried without gravity but with rotary motor and gear mate works.
I can't understand why that happen. Obviously i did something wrong.
Does anybody know how to sort this out?
Sorry for my English.
Thank you for your help.