This paper presents configuring of a virtual reconfigurable 5-axis machine tool for the purpose of realizing the simulation of the machine according to the running program. Machining simulation is realized in the CAD/CAM environment, when the machine works according to the CL files based running program, and in the STEP-NC Machine environment, when the machine works according to the STEP-NC format based running program. In this way, a possibility of program verification for the machine is obtained, which includes a complete virtual model of the machine configured with the corresponding kinematic relations. Verification of the virtual machine, in both environments, has been done by simulations of machining several test workpieces based on the running program
