This bachelor assignment deals with oozing behavior and torque control for 3d printers. Oozing, excess filament flowing out of the nozzle forms a big problem when dynamically 3D printing objects. In this assignment, the possibility of torque-controlled extrusion has been investigated to reduce this oozing. Existing literature was used to get a mathematical model of the system and to look at possibilities for control. With this, a model of the extruder, liquefier, and nozzle was made.
The idea of feedforward control and adaptive feedback was discussed. For the feedforward path a gain was determined through experiments. However, the gain was not tested or implemented. A theory for adaptive control was made but this was also not implemented in the end.
The assignment concludes with the findings for the feedforward path and with ideas for further research into this subject.