ENGINEERING SENIOR CAPSTONE (TEAM 19101): AUTOMATED BUILD SURFACE FEED SYSTEM FOR MICRO-3D PRINTER

Abstract

The goal of this project was to design and build an automated Build Surface Feed System (BSFS) that can allow Micro FDM (the sponsor for the project) to run multiple prints sequentially, with limited human interference. Interchangeable surface cartridges are stacked between two parallel track assemblies within the BSFS. The tracks are driven by two stepper motors which allow for precise positioning of cartridges in front of the build plate of the printer. Once the cartridge is aligned, a linear actuator mounted with electromagnetic solenoids connects to the steel components of the cartridge and moves it into place on top of the build plate. Then the Locking mechanism of the printer holds the cartridge during ongoing prints. After a print is complete, the linear actuator moves the cartridge and completes the print back onto its original slot on the treads. The treads would then be moved up to align a new cartridge with the buildplate and the process repeats. The movement of the BSFS is controlled by the feed system driver (FSD) fireware, developed and programmed by the team. Unfortunately due to the unforeseen Covid-19 pandemic the assembly of the full functioning feed system was not completed, therefore the scope of the project was modified to fit with the current situation. The project was shifted to focus on developing the BSFS to help mass produce face shields for essential workers during this pandemic. The team took on the role of advisors and consultants, as well as continued the development of the FSD firmware. Micro FDM LLC took on the responsibility of assembling the BSFS.