Talk:Oscillating fan

From DDL Wiki

We received your report, and we are impressed with your clear findings and documentation. Detailed comments follow:

• Please include a picture of the product at the top of the page
• Excellent executive summary - your findings are well summarized
• Nice description of customer needs. You may consider additional issues, such as adjustment and storage.
• The description of function is rather clear, but a figure would help - especially for the oscillating mechanism. Also - how are different speeds achieved? Will engaging the oscillating mechanism have an effect on speed?
• Why is the front fan cover made of zinc while the rear cover is plastic? Is the front cover created by welding?
• It appears that some parts, such as the oscillation linkage, are likely stamped and bent, as opposed to cast. You may want to take a second look.
• Why was magnesium chosen for a number of the parts?
• DFMA - nice observations. It is not clear how several gears could be made into a single molding. You have some good suggestions.
• If RPNs are low only because the consumer will detect failure, this may be less than ideal. Detection of failure by the consumer may avoid catastrophic problems; however, by the time the consumer detects failure, the product has disappointed the consumer. Detection of potential problems before the product gets to the consumer would be more important for lowering RPNs, but some of the modes you identify could be candidates for improvement, regardless of detectability during use.
• The idea that fan manufacturers would contribute to global warming in order to sell more fans seems far fetched.
• The LCA is quite interesting - the conclusion that use phase dominates is important. Can you run the electricity sector to see how GHG of use phase compare to manufacturing? It sounds like we should look into ways to reduce power consumption, even at the risk of slightly increasing manufacturing requirements?
• For the analysis, it would be helpful to see how these components fit together.
• The quantitative analysis does not explain where some of the numbers and equations come from, so it is difficult to follow. It looks like the oscillation speed is proportional to the fan speed. Is this desirable? Also, do you think the gear ratio choices are desirable? Finally, the speed is decreased 223 times, but the torque is only increased 11.5 times. This implies the power is decreased significantly - is this a source of power loss - can you comment on this?