Abstract
3D Printer using the Fused Filament Fabrication method has expanded its application to not only personal but trial and commercial products for industry. For precision printing, it is necessary to understand the discharge mechanism and how to control material feed speed. It is difficult to estimate mathematical expression which is used for designing a control system because of its complicated physical phenomenon such as melting of material and behavior of viscous fluid. In former study, there are some study to clarify dynamic characteristics of discharge process from experimental data. However, there are few cases of controlling the material feed with the estimated model. This report describes the estimated mathematical expression of the discharge mechanism from experimental data, and the results of experiments using feedforward control of material feed. As a result, the printing precision was improved.
