Height error mapping and compensation for a fused filament fabrication machine
Name
1023497811-MIT.pdf
Description
Full printable version
Size
16.81 MB
Format
Adobe PDF
Checksum (MD5)
fdb677d535f77816a6eafcc1a938de91
Author(s)
Lee, Shien Yang
Advisor(s)
David E. Hardt.
Date Issued
2017
Publisher
Massachusetts Institute of Technology
Abstract
An artifact-based height error mapping and compensation method for fused lament fabrication machines ("3D printers") is developed. In the proposed method, an error mapping artifact is produced and inspected using a coordinate measuring machine to determine height errors at 81 discrete points in the machine's work envelope. A polynomial regression model is fitted to this measured data and used to generate height error predictions at each point in the volume of novel parts. Finally, height error compensation based on the aforementioned model is applied by modifying G-code sequences used to drive the machine. Preliminary experimental validation of the proposed method's efficacy was carried out on NVPro fused lament fabrication machines manufactured by New Valence Robotics Corporation. Results suggest the proposed method is capable of reducing systematic height errors and spatial dependence of height errors over the work volume studied. However, these improvements are attenuated by an accompanying increase in random height variation resulting from the intervention. Recommendations for further testing, refinement, and application of the proposed error mapping and compensation method are presented.
Description
Thesis: M. Eng. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 95-98).
Subjects
Mechanical Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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