Drill Explanation
From GICLWiki
Contents |
Product Explanation
Purpose
The purpose of this gate is threefold: reassembly of the product, analyze the previous information gathered to make more detailed conclusions about the product, and present the information in a technical report on the groupʼs wiki.
Project Management: Critical Project Review
Cause for Corrective Action
At this point in the semester our group has ironed out any issues working together. There have been no challenges with this gate or the last three.
Product Archaeology: Product Explanation
Product Reassembly
Mechanisms
| Mechanism Table | ||||
| Technical Name | Purpose | How it works | Equations | Pictures |
| Electric Motor | Converts electrical energy into mechanical energy | The motor uses the principles of magnetism around an armature or an electromagnet that is free to rotate. With polarity changes rotational motion or mechanical work is formed. | Power=V x I x eff; Torque=(Power x 5252)/rpm | 
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| Epicyclic Gearing | Changes output rpm from motor as well as torque. It also prevents the motor from being damaged with a one way input torque from only the electric motor. | In this gearing system, there are the following gears: a sun gear, the planetary gears, and the annulus bigger gear. The main workings of this mechanism involve creating more torque. | 1 revolution of sun gear = -teeth(sun)/teeth(planetary)= Teeth(planetary gear)/teeth(annulus outer gear) | 
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Design Revisions
| Design Revision Table | ||||
| Original part/setup | Revision | GSEE reflection | Strengths | Weaknesses |
| Electric Motor (Carbon brushes) |
Brushless Motor | Economic: Fewer charges from battery with more efficient motor Longer lasting motor provides less waste with fewer thrown away drills from broken motors. Environmental: More durable motor and longer lasting power through greater efficiency decreases terrain vulnerability of breaking and running out of power. |
Greater torque Up to 50% less demand on battery less repair because motor lasts longer lighter motor quieter |
cost increase by 15% |
| No cognitive assistance | light and level | Societal: A light and level attached to drill can offer the consumer an innovation that can be seen and advertised as convenient. Environmental: A light can provide convenience in conditions of low light. A level can provide convenience in areas where being level is impertinent such as drilling or screwing upside down. |
Illumination Cognitive assistance |
Uses some battery power in led light Adds an estimated 10% increase in cost |
| Basic NiCad battery | Lithium Battery with life indicator |
Societal: Lithium battery especially with life indicator contributes as a good selling feature Economic: Battery lasts longer and requires fewer charges than original Contributes to fewer thrown away drills from dead batteries. Environmental: Drill can be taken to locations without as much worry about recharging. Life indicator allows consumer to know when he must recharge it, which would provide more versatility of use. |
Lighter Longer usage Life indicator convenience No memory effect (sustains maximum battery life) Very little loss of charge when not in use. |
cost increase by 15% |
