The user can apply user’s experimental solutions on the Sheet by using Nodal Force. For example, the following forces can be installed on the media transport system.
•An attraction force between the belt and the sheet due to vacuum
•An electrostatic attraction between papers and rollers
•An air resistance force of papers
•The user should know that returned forces of a nodal force would be:
•Calculated in the Inertia reference frame
•Applied on the center point of each nodal mass
Also, the forces will be reacted on the ground. The user can program a user-written subroutine with one of C/C++ or Fortran languages.

Figure 1 Nodal Force