| 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 |
System Identification of Fused Filament Fabrication Additive Manufacturing Extrusion and Spreading Dynamics |
| Author(s) |
Osama Habbal, Ali Kassab, George Ayoub, Pravansu Mohanty , Christopher Pannier |
| On-Site Speaker (Planned) |
Christopher Pannier |
| Abstract Scope |
In fused filament fabrication additive manufacturing, polymer extrusion and spreading dynamics affect build quality in both surface finish and mechanical properties. However, the nonlinear extrusion and spreading dynamics are ignored by slicers. To advance the aim of slicing using accurate nonlinear dynamic models, this work presents a system and procedure for automated measurement of dynamic bead extrusion. The system uses a belt printer, iFactory3D One Pro, with nozzle tilted 45 degrees from the build belt, and a snapshot 3D scanner. Single layer prints in polylactic acid (PLA) are scanned and then automatically ejected. The G-code for the L-shaped print holds the gantry speed fixed while the extrusion flow rate is varied as a square wave signal in space. The experiment design matrix varies three variables: extrusion temperature, gantry speed, and extrusion flow rate. Time constants are fitted to bead width signal extracted from the scan data to obtain nonlinear models. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |