Simulating a mechanical system controlled by a motion controller. First position data may be received. The first position data may be provided by a motion controller at a first rate. The first position data received at the first rate may be interpolated to provide second position data at a second rate. Operation of the mechanical system may be simulated or modeled using the second position data at the second rate. Interpolating the first position data and modeling the operation of the mechanical system may be performed without simulating drives and motors necessary to drive the mechanical system.