Weed whacker
From DDL Wiki
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| Slip || Doesn't rotate || 5 || gears aren't properly alligned || 5 || Unallign gears and turn on || 5 || 125 || Check how much tolerance the shafts give the rod and gears || | | Slip || Doesn't rotate || 5 || gears aren't properly alligned || 5 || Unallign gears and turn on || 5 || 125 || Check how much tolerance the shafts give the rod and gears || | ||
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Revision as of 13:36, 17 September 2008
Contents |
Stakeholders
There are several stakeholders that will be affected by our changes to this product. They include:
The manufacturer
Fulltime/partime gardeners
Lawn owners
Raw material suppliers
Gardening/home improvement stores
Product Usage
Usage of a weed whacker is very straight forward. For situations and areas where a lawnmower would be difficult to use, the hand-held weed whacker becomes a tool of choice. The convenience of this gardening tool comes from its ability to quickly cut vegetation in hard to reach places without damaging structures that may surround it.
In order to power on the weed whacker, first make sure there is sufficient gas in the tank. Click the on/off switch to on. Intructions on how to start the motor are included on a sticker on the straight shaft, and are as follows:
For a cold engine:
1. Press bulb 10 times.
2. Move blue choke lever to "1".
3. Squeeze trigger and pull rope 5 times.
4. Move blue choke lever to "2".
5. Squeeze trigger and pull rope till engine starts. If it doesn't start, repeat steps 1-5.
6. Let engine run 15-30 seconds.
7. Move blue choke lever to "3".
For a warm engine:
1. Move blue choke lever to "2".
2. Squeeze trigger and pull rope till engine starts.
3. Move blue choke lever to "3".
Once the engine is running, it is a simple matter of pointing the spinning wire towards the vegetation you wish to cut. If you wish to lengthen the wire, tap the bottom of the weed whacker to the ground, and a pre-measured length of wire will be added on. To stop the motor, simply press and hold the off button.
System Functions
Failure Mode Effects Analysis (FMEA)
| Item and Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility and Deadline | Actions Taken | S | O | D | RPN |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wire safety | cell 1,1 | cell 1,2 | |||||||||||||
| ! Bevel-Gears | Slip | Doesn't rotate | 5 | gears aren't properly alligned | 5 | Unallign gears and turn on | 5 | 125 | Check how much tolerance the shafts give the rod and gears |
Design for Environment (DFE)
There are two main aspects of this product to scrutinize in order to reduce its impact on our environment - usage and production. Since the mechanics of how a weed whacker works are quite simple, there is little that can be done to reduce waste from the usage of this product. The The mechanics that go into a weed whacker are frankly quite simple.
