研究目的
The objective of the project was to build a working printer that makes multi-layered parts with good repeatability. Accuracy was to be judged after a repeatable printer was obtained.
研究成果
The paper documents the successful efforts of a student team in rebuilding and improving a DLP 3D printer as part of a capstone project. The project provided valuable educational experiences in scheduling, organizational and team skills, problem-solving, and hands-on learning. The final result was more than acceptable for a senior capstone project, with ongoing improvements planned for accuracy and contamination issues.
研究不足
The project faced issues such as build plate leveling, determining the exact distance for the stepper motor, resin box fit, projector positioning and leveling, resin curing, part sticking to the build platform, resin dripping, and the need for trial and error in printing. Future improvements include finding a more effective resin, better curing settings, protective measures for the projector, clear-sided resin box, optimal software settings, cable management, optimal projector location, non-pigment resin, thermal experiments, z-axis sensor, and additional fan installation.
1：Experimental Design and Method Selection:
The team was tasked with rebuilding a non-functional DLP printer, addressing issues such as an overheated projector, inefficient resin box, and old resin supply. The methodology included cleaning the printer enclosure, applying protective tint, disassembling the previous design, ordering a new projector, researching and purchasing new resin, designing and fabricating a new resin box and build platform, removing the color wheel from the projector, creating a fan installation, and printing parts.
2：Sample Selection and Data Sources:
The team used a non-functional DLP printer and researched open source software and resin products for the project.
3：List of Experimental Equipment and Materials:
The team utilized a projector, resin, tint film, stepper motor, printer enclosure, UV light filter, aluminum frame, steel, screws & nuts, and a laptop for software.
4：Experimental Procedures and Operational Workflow:
The team followed a sequence of tasks including cleaning, applying tint, disassembling, ordering new components, designing and fabricating new parts, and testing the printer.
5：Data Analysis Methods:
The team conducted a simple experiment to determine the best settings for printing, comparing layer thickness and exposure times for resolution and grade.
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