P17521: Kodak Dry Ink Station Coupling Test Bed
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Build & Test Prep

Table of Contents

Team Vision for Build & Test Prep Phase

First and foremost, team P17521 upon completing MSD I had an outstanding request for an electrical engineer to be added to the team. This request was granted at the start of MSD II, which was very fortunate and necessary, but now required a step back from the end state of the project since the completion of MSD I, which is explained below:

During this phase, the team primarily aims to re-evaluate the project design (specifically the electrical aspect with new team member, Dave Yin). This backtracking is necessary in order to ensure a thorough build of the testing fixture, now that there is such a good electrical engineering resource at the team's disposal. Secondary goals are to finalize mechanical design for upcoming fabrication (ASAP) and preliminary discussion on data/error analyses following testing. A preliminary estimate of timing is shown below, with the caveat of some times varying following the electrical design discussions:

Preliminary Fall Project Plan

Preliminary Fall Project Plan

The entire vision for this phase was completed, along with some electrical design prototyping, which is an important step before final subsystem (and then system) assembly.

Design Summary

Mechanical

At this stage, the mechanical aspect of design is complete, leading to next steps of materials sourcing and purchasing, before sending the material to the machine shop for manufacture.

Electrical

Where the original plan was to review the design for further design following this phase, the team has even further progressed into detailed design. The following circuit diagram was constructed for the encoder and DAQ systems:
Electrical Diagram

Electrical Diagram

Next steps in design are to purchase the DAQ, encoders, and any other electrical components for preliminary assembly and test.

Software & Analysis

Preliminary research into analysis involved discussion with subject matter experts regarding error measurement and sensitivity. These discussions led to the realization of new test plans needing to be made, ensuring error is less than the allotted error noted in the customer requirements.

Test Plan Summary

Test plans were drafted during MSD I in separate documents, one per Engineering Requirement. The next step in the process is to convert each document into one spreadsheet for easy addition of values from data measurement/analysis. This is the most efficient way to determine and show each engineering requirement, along with acceptable margin of error, has been satisfied by the test fixture. An example of the new formatting is shown below for ER 1:

public/Detailed Design Documents/Test Plans/ER1 Test Plan-a.PNG

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public/Detailed Design Documents/Test Plans/ER1 Test Plan-b.PNG

public/Detailed Design Documents/Test Plans/ER1 Test Plan-b.PNG

Risk and Problem Tracking

The Risk Management tracker was updated following the addition of Dave to the project team. No more level 81 risks are identified, however the team can now focus on reducing any level 27 risks that are still active.

Post-Summer Risk Management Update

Post-Summer Risk Management Update

Plans for next phase

As noted in the project plan above, the next steps for the upcoming phase are to order stock for manufacture of mechanical parts, purchase electrical components for assembly, and begin outlining the code for data collection and analysis.


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