Group 28 - HP Officejet 7310 All-in-One printer

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HP Officejet 7310 All-in-One printer[1]



For MAE 277, Introduction to Mechanical Engineering, our group will be reverse engineering a HP Officejet 7310 All-in-One printer. As group 28, our five members will work together in a collaborated effort to completely disassemble the printer, all the while using an engineering standpoint to analyze each component and part. Once our printer is taken apart, we will then reassemble our product, returning it to its original state, and wrap up our engineering analysis.

Group Members

  • Matthew Forrest - Project Manager
  • Martin Moy - Assistant Manager
  • Dennis Maines - Technical Expert
  • Lisa Vogt - Design Specialist
  • Max Wroblewski - Communications Representative

Executive Summary

The two major processes of this project were the disassembly and reassembly. The disassembly gave us our first glimpse into the workings of the product, but compared to the information we gained and discovered during the reassembly, the disassembly served more as a stepping stone along the way. Taking the printer apart didn’t require any thinking as to what went where and why. During the disassembly we simply removed the components that were most visible at the time. In doing this however, we set ourselves up for the reassembly. The reassembly required all the thinking that taking the printer apart did not. We had to realize the function of each part before we could reattach it successfully, and understand how it interacted with other parts around it. Without first understanding the functions the various parts performed in, reassembly would have been impossible.

One of our most important findings was the method in which the signal, energy, and material flows ran throughout the product. In the printing process for example, the initial signal began the process, which then started the extremely coordinated movements of the rollers, ink carriage, and the many belts and gear trains that connected with these. There are only two motors dedicated to the print function, but through the flow of mechanical energy by way of gears and belts, numerous parts can be moved, disengaged, or reengaged depending on the current stage of printing. Understanding how these flows interacted with the components was essential to reassembly. Considering the small space and the density of the parts within the product, the way in which everything meshes together and functions as a single unit is remarkable.

Project Planning: Gate 1

  • Work Proposal
  • Management Proposal
  • Project Archeology

Product Dissection: Gate 2

  • Preliminary Project Review
  • Product Dissection

Product Analysis: Gate 3

  • Coordination Review
  • Product Evaluation

Product Explanation: Gate 4

  • Critical Project Review
  • Product Reassembly

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