Salt Lake City, Utah
June 23, 2018
June 23, 2018
July 27, 2018
Experimentation and Laboratory-Oriented Studies
While the Fused Filament Fabrication (FFF) 3D printers are now ubiquitous devices in many undergraduate engineering curricula, the Digital Light Processing (DLP) 3D printers just became affordable for widespread use in undergraduate engineering labs. This paper will address the similarities and differences between DLP and FFF 3D printers as measured by undergraduate students. While measuring various characteristics of these 3D printers, students became more knowledgeable and accustomed to different 3D printing processes. 3D printing lab/lecture modules are formally introduced in detail in a required, one-semester, three credit-hours, senior-level Computer-Integrated Manufacturing course in two engineering programs, Bachelor of Science in Engineering with specialization in Mechatronics (BSE-Mechatronics) and Industrial Engineering (IE). During the lecture portion of the course students learn about various 3D printing technologies. In the lab, they build a number of various small objects using one of nine FFF 3D printers and three LDP 3D printers. For comparison purposes, they create a tensile test specimens on each type of the 3D printer. Then, they compare the processes (printing speed and additional post-processing work required to obtain the final part), the objects (surface structure and smoothness, object’s dimensional precision, and object’s mechanical characteristics), and materials (environmental impact and cost). Students’ knowledge gain is measured via test questions dealing with additive manufacturing processes and equipment. Student excitement is assessed by evaluating student surveys, discussions, and personal informal interviews. Students’ knowledge of 3D printing processes increased. From the direct laboratory exercises, they understand (and retain this understanding) how the use of different 3D printing processes depends on their application. As a motivational enhancement, they are fascinated with engineering when they see a solid object quickly emerge from a shallow tank.
Jaksic, N. I., & Ansaf, B. I. K. (2018, June), Inexpensive Digital Light Processing 3D Printers in Undergraduate Engineering Labs Paper presented at 2018 ASEE Annual Conference & Exposition , Salt Lake City, Utah. https://peer.asee.org/30659
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