This paper describes the construction of a spatial computer model of the PowerBot mobile robot from ActivMedia Robotics corp. The model was made based on measurements made in the laboratory where the robot was located by the method of reverse engineering. Reverse engineering [1] is the process of reconstructing a finished product into digital form for determination of the products design features with little or no knowledge of the processes involved in their original production. In some cases, the goal of reverse engineering is to re-document a product that may be a competitor's product, and the goal is not to directly copy the product but to conduct analysis of the competitor and possible refinement and modification of the product to make it better and more competitive. The 3D model was created in Autodesk Inventor Professional 2018. The modeling of individual parts of the robot is described in detail, and sketches of the parts are shown as well. The creation of a robot movement simulation is also described, and instructions for recording the simulation are also provided, as well as some of the possibilities for creating a simulation. The conditions required for creating a simulation in Inventor Studios are also defined.