| About this Abstract | 
   
    | Meeting | 2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023) | 
   
    | Symposium | 2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023) | 
   
    | Presentation Title | Non-linear Dynamic Modelling of Cartesian-frame FFF 3-D Printer Gantry for Predictive Control | 
   
    | Author(s) | Maharshi   Arindom Sharma, Albert E Patterson | 
   
    | On-Site Speaker (Planned) | Maharshi   Arindom Sharma | 
   
    | Abstract Scope | This paper addresses the dynamic modelling of an FFF 3-D printer gantry (2-D) to reduce manufacturing defects from extruder carriage error. Physical examples of vibration errors are presented with observations about the machine-related causes of these errors. A six-dimensional non-linear dynamic model of the printer gantry was derived using Newton-Euler method. The Lagrangian dynamic model was derived to get additional insight on energy transfer aspects and model validation. A state-space model of the full system was developed for positioning and control. A detailed case-study of an example printer was completed in Matlab-Simulink to demonstrate the system model with comparisons from the analytical model and some physical characterization on a printer. Finally, a few examples of passive control designs were illustrated for predictive control. It was concluded that dynamics-based predictive control is a promising, realistic, and practical approach to controlling the dynamic error and dimensional error commonly seen with FFF machines. | 
   
    | Proceedings Inclusion? | Definite: Post-meeting proceedings |