P08028: Magnet Centering Device
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Set Final Specifications

Develop Technical Models of the Product

With the concept of the design determined by conducting reviews and interviewing the customer and people who are heavily involved with the LVAD heart project, in particular the centering magnet device, the decision was made to develop a test rig. Design A was choosen to be the best design further, Design A had several revisions as a result from the detail review. Below illustrates the design our team developed:

Refine the Specifications, Making Tradeoffs Where Necessary

The tradeoffs to the Design A was a cost factor. The design implements linear and rotary stages to move the magnet and bushing to their magnetic and physical center respectively. A laser sensor is used to measure the physical characteristics of the component. The following chart illustrates the usefulness of each component by the number of times they are used throughout the process and related them to the customers needs.
 The components were ranked due to the number of their usage.

The components were ranked due to the number of their usage.

The chart above illustrates the how often the components are used throughout the process and the chart below illustrates the precision that each component needs to be.
 The components are related with the precision and the number of usage throughout the process.

The components are related with the precision and the number of usage throughout the process.

By relating the importance of the precision of the components and the number of times the component are used, our team determined their importance. Through this process we could determine what components would best suit our project.

Reflect on the Results and the Process

Through this process it was determined that the majority of the projects budget would be used to measure and determine the physical diameter of the bushing and magnet. The second important component to the test rig is the motorized parts that moves the magnet and bushing. In addition to the importance of the parts mentioned above, the portion of machining would be done by CNC machines to minimize error and tolerance stacking.

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