Mechanical and electronical upgrade of a used woodworking CNC machine

CNC stroji so danes tako v lesni industriji kot pri obrtnikih postali osnovni obdelovalni stroji. Z njimi močno povečamo storilnost in kakovost izdelkov. CNC stroje relativno enostavno programiramo s CAD/CAM programsko opremo, če pa so stroji opremljeni z avtomatsko izmenjavo orodij, lahko stroj enostavno, varno in hitro opravi več operacij. Razvoj CNC strojev je hiter, saj proizvajalci sledijo novostim na področju elektronike in informacijskih tehnologij. Manjšim obrtnikom predstavlja nakup novega sodobnega CNC stroja velik strošek. V nalogi je predstavljena nadgradnja malo rabljenega 3 osnega CNC stroja z zastarelo krmilno elektroniko v sodoben 3 osni CNC stroj z avtomatsko izmenjavo orodij. V prvem delu je predstavljena mehanska nadgradnja stroja z obdelovalnim agregatom z avtomatsko izmenjavo orodij in vrtalno enoto. Zasnovan in izdelan je bil nosilni vmesnik obdelovalnega agregata, ki je bil preverjen z napetostno deformacijsko analizo z metodo končnih elementov v računalniškem programu Autodesk Fusion 360. V drugem delu pa je predstavljena posodobitev krmilne enote stroja s strojno opremo Hyper Cut in Mach 3 CNC krmilnikom, ter programiranje makrojev za avtomatsko menjavo orodij. Nadgrajeni stroj izpolnjuje vse postavljene zahteve in se uporablja v obrtniški delavnici.CNC machines have become fundamental machine tools in wood industry and also in craft industry. By using them, it is possible to increase productivity and the quality of products. They are fairly easy to be programmed, using CAD/CAM softwareif they are equipped with the automatic tool exchange, the machines can perform several operations simply, safely and quickly. The development of machine tools is rapid as producers keep up with novelties in the field of electronic and information technologies. The purchase of a new modern CNC machine represents a large expense for smaller craftsmen. In the thesis, the upgrade of a 3 axes CNC machine not much used and with obsolete control electronics to a modern 3-axes CNC machine with the automatic tool exchange is presented. In the first part, the mechanical machine upgrade with a machining unit with the automatic tool exchange and a drilling unit is described. The supportive interface of the machining unit was conceived and producedit was checked on the basis of stress and deformation analysis with the finite element method, using the Autodesk Fusion 360 software. In the second part, the control unit upgrade with Hyper Cut hardware and Mach 3 CNC software and macro programming for the automatic tool exchange are presented. The upgraded machine fulfils all the requirements and is used in a workshop