I do seem to miss a thing here. I want a network of 3 or more pulleys, where the shaft of one pulley is driven by a motor while the others drive some inertias via their shafts (in the following examples there are free rotational ends instead of inertias). I have studied the "best practices for pulley networks" example and read all the documentation that is out there, but I still encounter this problem:
Modeling the network with "ideal" pulleys without slip works fine. However, if I change the belts to "V-belts", the solver is not able to solve it anymore. Either it does not converge, or it can not solve the algebraic equations, etc. Or another one: The simulation is successfull, however, while the driven pulley shaft is rotating, the belt ends of said pulley do not receive any translational motion (meaning there is "total" slip, right?). I attached a sample file.
As you can see, the pulleys/belts slip in an absolute way. This is also true, if I remove one spring/damper couple. The springs have a small initial deformation (-0.005m) as recommended, and I am using an ideal torque source instead of velocity source, also as recommended. What am I doing wrong? I should add that I do care about the wrap angle and either calculate it or copy it from the transmission's datasheet.