Thank you everybody.
@Robin2: I´m a bit confused now. After reading the following link I thought that there are common servos that provide feedback:
@zoomkat: I can not really clearly state the problem because there is no clear problem. I was wondering about how to avoid motor damage in case of overloading it but not in a specific case.
If "It depends on the setup and situation" is the answer and there is no standard solution then that´s answered the question. 
@Shpaget: Thank you for the answer.