Ice cream maker
From DDL Wiki
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| The rotation of the motor will not be transferred to the product || 8 || The increased friction in between the separate gears can cause the gears to strip || 2 || Testing the durability of the gears || 3 || 48 | | The rotation of the motor will not be transferred to the product || 8 || The increased friction in between the separate gears can cause the gears to strip || 2 || Testing the durability of the gears || 3 || 48 | ||
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Revision as of 20:53, 22 September 2007
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Motor
| Electrical failures: Motor may overheat and fail | Product will not mix the ice cream, and the product may not have good consistency. | 8 | Motor may overheat when the ice cream starts solidifying. The increased viscosity of the ice cream may add too much torque on the motor. | 6 | Testing with different types of ice cream and find the point when the load applied is too high | 3 | 124 | Find a controller that will turn off the motor once the torque applied to the motor gets too high | Motor Manufacturer | Integrate a current sensor into the design | 8 | 1 | 3 | 24 |
| Mechanical Failure: Gear train may strip | The rotation of the motor will not be transferred to the product | 8 | The increased friction in between the separate gears can cause the gears to strip | 2 | Testing the durability of the gears | 3 | 48 |
