Talk:Ratcheting screwdriver

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We received your report, and you have some interesting findings, but we would like to see more detail in some areas. Comments follow:

  • Please include a picture of the product
  • Nice executive summary – your findings are clear.
  • Explanation of product function is rather clear, but figures would help. It is difficult to imagine the packaging of the mechanism without documentation.
  • The customer use description is fine, but a more detailed account of the procedure would be useful.
  • The DFMA is detailed. A summary of findings before including the list of data would be helpful.
  • The LCA is interesting, but a change to nuclear power is far beyond our scope. More detail on your analysis would be helpful – which sectors did you use to represent ratcheting screwdriver manufacturing? Does use phase or manufacturing dominate the drill impact?
  • The FMEA appears to be just a data table with no discussion. What are we supposed to do with this? How will stronger metal reduce failure from the dead battery pack?
  • Some pictures appear to be missing from the parts list, and some pictures include multiple components without identification of the component in study. Also, your parts list includes only one sun gear and one planet gear, but there seem to be more. Why would copper be selected for the gears? Please reexamine.
  • The gear analysis is clear – so is the 0.011 gear ratio the right ratio for the drill? What can you conclude?
    • The mechanical analysis of the gear train has been expanded to include an overall conclusion of this gear ratio.
  • It is difficult to follow your analysis of the pawl without a diagram. Is the pawl the most likely point of failure, or would it be the ratchet wheel? Is the resulting failure torque of 23 N-m reasonable? What factor of safety does it give for the most extreme working conditions you might expect?
    • The mechanical analysis of the pawl has be redone within the report, including diagrams explaining parts of the analysis.
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