Method and device for exact volume control of the material supply and process monitoring in 3D printing with material supply in wire form

摘要

Method for producing 3-dimensional workpieces with a 3D printing process, in which the workpiece is constructed by applying a thermoplastic material in which the raw material in the form of filament material is supplied, characterized in that - that the exact volume flow of the supplied filament during the printing process is measured by the device according to the invention in order to compensate for diameter fluctuations and roundness deviations of the filament and slip losses in the length advancement. - The device for measuring filament diameter and length feed contactlessly transmits the data to the machine control, where it necessary corrections to the filament feed device are calculated and corrected, so that the desired volume flow of the extruder can be controlled. - The device detects errors such as filament breakage, filament jam and thickening and transmitted to the machine control.