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This paper deals with an advanced modeling of the feed drives of a five axismachine tool within the context of High Speed Machining. The management of themulti axes as well as high velocities causes problems to the set machine tool -Numerical Controller throughout the trajectory execution process. As a result,many errors are introduced during machining all process long affecting thesurface quality. The paper aims at modeling the feed drive dynamics duringtrajectory follow-up including the current, the velocity and position loops aswell as the feed forward terms, which characterize classical drives on actualHSM machines. It concerns translational axes as well as rotary axes. Aprocedure of identification is implemented. Performances of the model areassessed by the comparison between simulated tool paths to the real one.Experimental verifications of the virtual axis model are detailed for three andfive axis trajectories presenting various types of geometrical discontinuities.

Feed drive simulation for the prediction of the tool path follow up in High Speed Machining