A post‐processor for the five‐axis machine MultiProDesk based on inverse kinematic transformation

Abstract

This paper shows the development of a post‐processor for a five‐axis table tilting machine. Postprocessing software transforms a machining toolpath in CL file into G‐code, which is necessary for the machining process in most CNC. The subject of this analysis is the MultiProDesk machine with two rotary axes on the machine table. The kinematic structure of the proposed machine is C'A'Y'OXZ. The machine can be modeled with two kinematic chains, one carrying the workpiece and the other carrying the tool. Equations needed to transform the CL data into the displacement of the machine's axis were derived using the inverse kinematic model. Currently, the machine has a three‐axis configuration, and the model was extended using simplified versions of the two rotary axes. The inverse kinematic equations were implemented in a post‐processing algorithm in the Matlab software. The calculated data was tested in the form of a G‐code on a virtual model of the machine in the Vericut software. The simulated workpiece machined in the virtual surrounding matched the original workpiece used to calculate the toolpath, verifying the developed post‐processor for the considered machine.