Hello

i have a problem in simulating a spring which its length would change base on the situation

and i can do it only with external link(reference) method

but the problem is that ,in this method , assembly needs to be rebuilded and it would automatically be done in animation mode but the problem is i have mechanism that needs contact ,spring,and gravity forces,and these cannot be recognized by solidworks in animation mode on the other hand if i want those forces i should switch back to basic motion and then the external link for the length of the spring wont be recognized by solidworks(in basic motion) .

well what is the solution for this problem?.

i just want it to recognize the external link and forces in the same time

thanks in advance