Talk:Staple gun
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* Your DFMA analysis was insightful. | * Your DFMA analysis was insightful. | ||
* Also, please include a free body diagram with numerical analysis of the input and output forces and the energy transfered to the staple. Can you be clear about why a spring is used in a two-part operation instead of applying the user's input force directly to the staple itself? | * Also, please include a free body diagram with numerical analysis of the input and output forces and the energy transfered to the staple. Can you be clear about why a spring is used in a two-part operation instead of applying the user's input force directly to the staple itself? | ||
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| + | ===Additional Comments=== | ||
| + | It could be useful, if along with the various ways in which the product has been designed for X, you mentioned whether or not you found these design points to be sufficient, or lacking. | ||
Revision as of 22:14, 15 February 2007
We received your report on the stapler and were very impressed with your work. Your analysis and conclusions are clear, and you have identified a number of opportunities for improvement. We can’t wait to see what you come up with in the next phase. Detailed comments follow:
- Your assembly picture was a big help in understanding the function, but can you label major parts? The description of function is great, but would be much more helpful if parts in the disassembly picture were labeled so that we can see what you mean. The video is a nice touch, but the low quality makes it difficult to see details. Your links to pictures of parts in the disassembly procedure section really helped us see what you were talking about.
- Why is the bending spring composed of two metal bars instead of one? Also, you mentioned that the bending of the spring was below that which would cause failure, but I didn’t see the calculation – is it far below? Should we reduce the size?
- safety to prevent misuse, tight corners
- You have identified some good areas of improvement from your user study – the difficulty inserting staples, high required force to operate, difficulty working in tight corners, and difficult using the tension adjust lever. We are also surprised that the user fired the gun several times without realizing that there were no staples loaded. Doesn’t this model have a window for viewing the presence of staplers? Should we redesign it? Also, did you come across any issues with different sized staples?
- Your FMEA seems a bit sparse. Do you think there might be other important failures? For example, is part 21 a wear part, since the springs appear to slap against it?
- Your DFMA analysis was insightful.
- Also, please include a free body diagram with numerical analysis of the input and output forces and the energy transfered to the staple. Can you be clear about why a spring is used in a two-part operation instead of applying the user's input force directly to the staple itself?
Additional Comments
It could be useful, if along with the various ways in which the product has been designed for X, you mentioned whether or not you found these design points to be sufficient, or lacking.
