Ansys Employee
For the above model, it might be a good idea to take a slice/section of the model and make use of linear periodic symmetry. This will save considerable computational expense. You can also make use of left-right symmetry. For the boundary conditions fix the lower most surface of the guide rail, define 2 pairs of frictional contact (for each row) ball-guide & ball-carrier. Define the ball surface as contact (fine mesh) and guide/carrier as target. Have a look at https://www.scirp.org/journal/paperinformation.aspx?paperid=71332.
Regards Ishan.