EAS 199A Lecture 14:     9,10 November 2011

Last updated at 02:34 AM on 23 Nov 2011

14. Intro to pump fabrication, least squares polynomial regression, R2

Class meeting on 9,10 November 2011

Homework: Problem Set 6 and Rubric for in-class demo of the desktop fan

Learning Objectives

  1. Be able to compute and interpret the R2 coefficient of a least squares line fit
  2. Be able to use Excel's trendline function to add a least squares line fit to data
  3. Be able to use Excel's trendline function to add a least squares fit of a polynomial to data
  4. Be aware of pump fabrication steps and responsibilities for students
  5. Be aware of the 3D solid modeling necessary for the impeller fabrication.

Notes and Supplemental Files

  1. Slides on R2: one slide per page or two slides per page
  2. Slides on polynomial curve fitting: one slide per page or 2-up handouts
  3. Pump fabrication overview PowerPoint, PDF, or 3-up notes
  4. Key operations on pump body (PNG image), and Larger PDF version
  5. Solidworks instructions for impeller design
  6. Instructions for manufacturing the pump body: PowerPoint, PDF, or 3-up notes

Solidworks Tutorial

The Solidworks Tutorial referred to on Homework 6 is the built-in tutorial that comes with the software.

  1. Launch Solidworks
  2. In the upper right part of the screen, under "Solidworks Resources", click on the "Making My First Part" link

Pump body operations

Graphical representations of key steps in fabricating the pump body

Click for larger PDF image

For good results

  • Apply the adage, "Measure twice, cut once"
  • Study the fabrication presentation before coming to class
  • Use the crank handle for z-direction motion -- DO NOT use the spindle handle for any critical z-direction operations
  • DO NOT use the spindle handle for any operations involving Forstner bits. The bits have a tendency to bite into the material in cut deeper than you want -- they tend to get "sucked into" the material. The crank handle allows much better control.