Ice cream maker
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| 4 || The increased viscosity of the product may cause the mixing arm to break. || 3 || Test to see the breaking point of the mixing arm. || 1 || 12 || Test different materials to find the most cost-effective solution || Manufacturer || N/A || 4 || 3 || 1 || 12 | | 4 || The increased viscosity of the product may cause the mixing arm to break. || 3 || Test to see the breaking point of the mixing arm. || 1 || 12 || Test different materials to find the most cost-effective solution || Manufacturer || N/A || 4 || 3 || 1 || 12 | ||
| - | + | |- align="left" valign="top" | |
| + | | Wiring | ||
| + | * Transmits the current from the outlet to the device | ||
| + | | Current does not get transferred from the power outlet to the motor | ||
| + | | Motor will not rotate the bowl, so contents of bowl will not get mixed. | ||
| + | | 4 || The increased viscosity of the product may cause the mixing arm to break. || 2 || Before final assembly of the product, test connection points to see if all wiring points are valid || 3 || 24 || Install a station in the assembly process to make sure that all wiring connections are good || Assemblerer|| N/A || 4 || 2 || 3 || 24 | ||
|} | |} | ||
[[Ice cream maker DFE]] | [[Ice cream maker DFE]] | ||
Revision as of 12:48, 23 September 2007
| Item & Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility & 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 | Test different materials to find the most cost-effective solution | Gear Manufacturer | N/A | 8 | 2 | 3 | 48 | |
Mixing Arm
| Mixing arm breaks/fails | Contents of the bowl will not be properly mixed to form a consistent product. | 4 | The increased viscosity of the product may cause the mixing arm to break. | 3 | Test to see the breaking point of the mixing arm. | 1 | 12 | Test different materials to find the most cost-effective solution | Manufacturer | N/A | 4 | 3 | 1 | 12 |
Wiring
| Current does not get transferred from the power outlet to the motor | Motor will not rotate the bowl, so contents of bowl will not get mixed. | 4 | The increased viscosity of the product may cause the mixing arm to break. | 2 | Before final assembly of the product, test connection points to see if all wiring points are valid | 3 | 24 | Install a station in the assembly process to make sure that all wiring connections are good | Assemblerer | N/A | 4 | 2 | 3 | 24 |
