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| | == '''Background''' == | | == '''Background''' == |
| | | | |
| − | *''Lead Wiki Developer – Christoff Forth'' | + | *''Lead Wiki Developer – Christoff "The Smooth Criminal" Forth'' |
| | **Format Wiki page | | **Format Wiki page |
| | **Review input data and update as necessary | | **Review input data and update as necessary |
| | **Add flash, pictures, animations, videos, and other complicated wiki features | | **Add flash, pictures, animations, videos, and other complicated wiki features |
| − | *''Communication Liaison – Benjamin Rinauto'' | + | *''Communication Liaison – Benjamin "The Poison Dart" Rinauto'' |
| | **Point of contact between group and instructors | | **Point of contact between group and instructors |
| | **Point of contact between group members | | **Point of contact between group members |
| | **Keeps track of and notifies group members of upcoming due dates | | **Keeps track of and notifies group members of upcoming due dates |
| | **Keeps group on a timely track for success | | **Keeps group on a timely track for success |
| − | *''Technical Expert – Eugene Grigoriev'' | + | *''Technical Expert – Eugene "Soviet Sensation" Grigoriev'' |
| | **Advises members on disassembly and assembly procedures | | **Advises members on disassembly and assembly procedures |
| | **Identifies points of product that members are not familiar with | | **Identifies points of product that members are not familiar with |
| − | *''Project Manager – Josh Weisberger'' | + | *''Project Manager – Josh "The Danish Delight" Weisberger'' |
| | **Oversees project development | | **Oversees project development |
| | **Ensures group stays on task | | **Ensures group stays on task |
| | **Photography of parts | | **Photography of parts |
| | **Advises 3D Solid Modeling | | **Advises 3D Solid Modeling |
| − | *''Safety Advisor – Dan McArdle'' | + | *''Safety Advisor – Dan "The Crouching Tiger" McArdle'' |
| | **Ensures safe use of tools for disassembly and assembly | | **Ensures safe use of tools for disassembly and assembly |
| | <BR> | | <BR> |
| | | | |
| − | [[Initial product assesment]]
| |
| | | | |
| − | == '''Task Deadlines''' ==
| |
| | | | |
| − | : 1. Request for Proposal : 10/09 | + | [[Gate One: Request for Proposal]] |
| − | :: 1.1. Complete Work Proposal : 10/07
| + | |
| − | :: 1.2. Complete Management Proposal 10/03
| + | |
| − | :: 1.3. Progress Review 10/08
| + | |
| − | :: 1.4. Familiarization with Wiki 10/08
| + | |
| − | : 2. Preliminary Design Review 10/30
| + | |
| − | :: 2.1. Disassemble product and label components 10/07-10/24
| + | |
| − | :: 2.2. Progress Review 10/24
| + | |
| − | :: 2.3. Add all information to the Wiki 10/09-10/30
| + | |
| − | : 3. Coordination Review 11/30
| + | |
| − | :: 3.1. Create Component list summary 10/10-11/14
| + | |
| − | :: 3.2. Complete an Engineering analysis of each component 10/10-10/14
| + | |
| − | :: 3.3. Learn and complete Solid Model 10/30-11/21
| + | |
| − | :: 3.4. Review Progress 11/21-11/30
| + | |
| − | :: 3.5. Post information to the Wiki 10/30-11/30
| + | |
| − | :4. Reassembly 12/7
| + | |
| − | :: 4.1. Reassemble the product 11/30-12/05
| + | |
| − | :: 4.2. Answer the given questions about reassembly 12/04-12/06
| + | |
| − | :: 4.3. Post information to the Wiki 12/05-12/07
| + | |
| − | : 5. Delivery 12/01-12/08
| + | |
| | | | |
| − | [[Image:ganttchart.jpg]] | + | [[Gate Two: Preliminary project review]] |
| | | | |
| − | == '''Causes for Corrective Action''' ==
| + | [[Gate Three: Coordination review]] |
| − | The plan for disassembly was well-planned and successful. We did not diverge from the gannt chart at all, and both our division of labor and plan for dissection were executed without any major mishaps. All in all, our management and work proposals worked very well.
| + | |
| | | | |
| − | The original proposal called for the disassembly to begin immediately. As planned, group 30 met up and collected the electric scooter from the lab as soon as they were allowed in the lab. During the first few meetings, the group disassembled the scooter into a few major parts such as the frame, the handlebars, and the wheels. They began removing the easiest part; the seat post. They were careful not to misplace small parts and immediately placed screws and nuts into labeled bags. To facilitate the scooter’s eventual reassembly, the group planned ahead and enumerated the steps taken so that backtracking would be a viable method to return every piece to its correct place. The majority of the scooter was disassembled by hand and with tools that were included in the box. On the final day of disassembly, they borrowed three wrenches from the lab and a set of Allen keys.
| + | [[Gate Four: Critical project review]] |
| | | | |
| − | The group digressed from the specified plan by not meeting every day that had a meeting planned. They were supposed to meet every Monday, Wednesday, and Friday after MAE277 to work on the dissection as well as on Saturdays. The reason for the meetings being canceled was due to the fact that no more work needed to be done to stay on the specified track.
| + | [[Gate Five: Delivery]] |
| − | | + | |
| − | == '''Product Dissection Plan''' ==
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Difficulty Scale, 1 → 3 ==
| + | |
| − | '''
| + | |
| − | *Difficulty = 1
| + | |
| − | **Straightforward disassembly
| + | |
| − | **Minimal force required with or without tool
| + | |
| − | *Difficulty = 2
| + | |
| − | **Requires intuition and planning
| + | |
| − | **Has multiple steps involved to detach
| + | |
| − | *Difficulty = 3
| + | |
| − | **Require excessive force to remove
| + | |
| − | **Difficult to remove even with tools
| + | |
| − | **Requires critical thinking to detach
| + | |
| − | <BR>
| + | |
| − | | + | |
| − | '''
| + | |
| − | | + | |
| − | == Challenges Faced ==
| + | |
| − | '''
| + | |
| − | Group 30 encountered several difficulties on the track to full disassembly of the electric scooter. Many components of the product were very difficult if not impossible to remove. For example, they were able to unscrew the screws from the motor cap but after doing so, the top could not be removed. The controller was easy to disconnect from the main frame and other major components such as the handlebar and the motor. However, after unscrewing the top, the group was unable to disassemble the controller further because a hard gel surrounded all the components. The third difficulty encountered was that the tires were unable to be removed from the metal axle.
| + | |
| − | <BR>
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Fasteners and Functions ==
| + | |
| − | '''
| + | |
| − | *Washers/Nuts
| + | |
| − | **"Locking" device to lock in screws
| + | |
| − | **Retain tension
| + | |
| − | *Clamps
| + | |
| − | **Used to hold bigger components together tightly
| + | |
| − | ***Vertical and horizontal handlebars
| + | |
| − | ***Clamps seat cushion to vertical seat bar
| + | |
| − | <BR>
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Tools Required ==
| + | |
| − | '''
| + | |
| − | There were no special tools required.
| + | |
| − | *Screwdriver
| + | |
| − | **Used to unscrew different size screws
| + | |
| − | *Hands
| + | |
| − | **Used to remove easily detachable components
| + | |
| − | *Wrench
| + | |
| − | **Used to remove various bolts
| + | |
| − | *Allen Wrench
| + | |
| − | **Used to remove hexagonal screws
| + | |
| − | *Pliers
| + | |
| − | **Used to attempt to dislodge motor cap
| + | |
| − | **Used to remove handlebar covers
| + | |
| − | <BR>
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Steps for Dissection ==
| + | |
| − | '''
| + | |
| − | | + | |
| − | {| border="3" cellspacing="0" cellpadding="3" align="center"
| + | |
| − | ! width="100" |Step
| + | |
| − | ! width="250" |Tools Required
| + | |
| − | ! width="200" |Overall Difficulty (1 → 3)
| + | |
| − | ! width="200" |Picture
| + | |
| − | | + | |
| − | |-
| + | |
| − | | align="center" |[[Seat Removal]]
| + | |
| − | | align="center" |Phillips Head Screwdriver Size = 1
| + | |
| − | | align="center" |1
| + | |
| − | | align="center" |[[Image:seat1.JPG|thumb|Seat]]
| + | |
| − | |-
| + | |
| − | | + | |
| − | |-
| + | |
| − | | align="center" |[[Handlebar Removal]]
| + | |
| − | | align="center" |Phillips Head Screwdriver Size = 1
| + | |
| − | Wrench
| + | |
| − | | align="center" |3
| + | |
| − | | align="center" |[[Image:handlebar1.JPG|thumb|Handlebars]]
| + | |
| − | |-
| + | |
| − | | + | |
| − | |-
| + | |
| − | | align="center" |[[Motor Removal]]
| + | |
| − | | align="center" |Phillips Head Screwdriver Size = 1
| + | |
| − | Allen Wrench
| + | |
| − | | align="center" |2
| + | |
| − | | align="center" |[[Image:motor3.JPG|thumb|Motor]]
| + | |
| − | |-
| + | |
| − | | + | |
| − | | + | |
| − | |-
| + | |
| − | | align="center" |[[Wheel Removal]]
| + | |
| − | | align="center" |Phillips Head Screwdriver Size = 1
| + | |
| − | Wrench Size = 15 mm
| + | |
| − | | align="center" |2
| + | |
| − | | align="center" |[[Image:wheels1.JPG|thumb|Wheels]]
| + | |
| − | |-
| + | |
| − | |}
| + | |
| − | | + | |
| − | ==Is the product intended to be taken apart easily?==
| + | |
| − | | + | |
| − | The product is intended to be serviceable, so there are components that are clearly meant to be taken apart. For example, the seat is intended to be removed so that the scooter can be ridden standing up. There are directions for the removal of the front and rear wheels, reflector, and battery in the manual in case anything needs to be fixed. The components not meant to be disassembled were easy to identify. The controller was filled with a solid gel to prevent corrosion, so it was impossible to disassemble. The motor, similarly was put together in such a way that it was also impossible to take apart.
| + | |
| − | | + | |
| − | | + | |
| − | | + | |
| − | == Component Summary ==
| + | |
| − | | + | |
| − | == Component Complexity Scale 1 → 5 ==
| + | |
| − | | + | |
| − | *Complexity = 1
| + | |
| − | **Non-moving component
| + | |
| − | **A single, simple function
| + | |
| − | **Example: Reflector
| + | |
| − | *Complexity = 2
| + | |
| − | **May move
| + | |
| − | **Has a single function
| + | |
| − | **Example: Wheels
| + | |
| − | *Complexity = 3
| + | |
| − | **Contains some sub-components
| + | |
| − | **May interact with the user
| + | |
| − | **Has one or possibly two functions
| + | |
| − | **Example: Brake pad
| + | |
| − | *Complexity = 4
| + | |
| − | **May move, interact with the user
| + | |
| − | **Multiple functions
| + | |
| − | **Example: Throttle System
| + | |
| − | *Complexity = 5
| + | |
| − | **Contains several sub-components that we were not able to remove
| + | |
| − | **Performs complex functions
| + | |
| − | **Example: Motor
| + | |
| − | <BR>
| + | |
| − | | + | |
| − | ==Components==
| + | |
| − | | + | |
| − | [[Plastic Frame Covers]]
| + | |
| − | | + | |
| − | [[Handle Brake]]
| + | |
| − | | + | |
| − | [[Throttle]]
| + | |
| − | | + | |
| − | [[Brake Pad]]
| + | |
| − | | + | |
| − | [[Brake Disc]]
| + | |
| − | | + | |
| − | [[Handlebar Locking Device]]
| + | |
| − | | + | |
| − | [[Vertical Handlebar]]
| + | |
| − | | + | |
| − | [[Rear Wheel Gear]]
| + | |
| − | | + | |
| − | [[Seat Post]]
| + | |
| − | | + | |
| − | [[Horizontal Handlebar / Crossbar]]
| + | |
| − | | + | |
| − | [[Motor]]
| + | |
| − | | + | |
| − | [[Controller]]
| + | |
| − | | + | |
| − | [[Chain guard]]
| + | |
| − | | + | |
| − | [[Chain]]
| + | |
| − | | + | |
| − | [[Rear Wheel]]
| + | |
| − | | + | |
| − | [[Rear/Front Axle]]
| + | |
| − | | + | |
| − | [[Main Frame]]
| + | |
| − | | + | |
| − | [[Seat]]
| + | |
| − | | + | |
| − | [[Fasteners]]
| + | |
| − | | + | |
| − | == '''Design Revisions''' ==
| + | |
| − | | + | |
| − | *Loop Attached to Frame
| + | |
| − | **Currently there is no way to lock the scooter. For most children who use the scooter solely for recreation this may not be a problem. If an adult or teenager is using the scooter for transportation, however, this becomes a great obstacle to the scooter’s use, as they cannot leave the scooter unattended. Welding or otherwise attaching a steel loop to the scooter’s frame transforms the scooter from a mainly recreational vehicle to one that is practical for transportation.
| + | |
| − | | + | |
| − | *Water/Salt Guard on wheels
| + | |
| − | **When taking the scooter apart, we noticed a large amount of salt and rust on the fasteners and other components near the wheels. From this information we can deduce two things: that the scooter was tested in the winter, and that winter weather, especially in buffalo, will have a big impact on the scooter. After a few years this could grow to be a very large problem. Already this problem made it difficult to remove some of the nuts. A simple solution would be a cover or guard that fits between the wheels and the other components so that the salt on the wheels is not transferred to the other components. Keeping the salt out could extend the life of the scooter and make it easier to service.
| + | |
| − | | + | |
| − | *Move wires into handlebar post
| + | |
| − | **Currently the wires connecting the brakes and throttle to the controller are outside the handlebar post, held there by a few thin loops. The handlebar post is hollow. There is no reason why the cables can’t be put inside the handlebar instead of hanging loosely on the outside. It would protect the cables better and improve the scooter aesthetically. The only problem it would create would be that the connection between the handlebars and the handlebar post would have to be changed in order to allow the cables to fit through.
| + | |
| − | **To implement, cut a hole at the connection of the vertical handlebar and the horizontal handlebar to insert the wires extruding from the throttle and the brake handle. Similarly, cut a hole in the semi circle frame-to-wheel connector to extract the wires from inside.
| + | |
| − | | + | |
| − | == '''3D Solid Modeling''' ==
| + | |
| − | | + | |
| − | Until the wiki server is fixed, all images are posted at sites.google.com/site/benbuzz790/pictures-for-wiki
| + | |
| − | | + | |
| − | '''
| + | |
| − | | + | |
| − | == Choice of Components ==
| + | |
| − | '''
| + | |
| − | The motor was chosen as the main focus for the 3D modeling because it is where the rotational energy comes from to turn the rear wheel via a connecting chain. The motor is also heavy so it must be supported by the frame. It is attached to the frame by four screws. The interconnecting piece between the motor and the frame is the "motor base". This piece is glued onto the bottom of the motor and has the four holes drilled through to allow for easy connection to the scooter's main frame. This in turn allows easier maintenance of the motor than if it had been hidden internally.
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Choice of CAD Package ==
| + | |
| − | '''
| + | |
| − | The choice of SolidWorks for the modeling process was based purely on availability as well as ease of use. The modeler for the group needed a package that was quick to learn as well as completely versatile and functional. The ease of dimensioning and extrusions was a significant factor in the choice as well, because the motor was based heavily on those two functions.
| + | |
| − | | + | |
| − | | + | |
| − | [[Image:motor_assembly.JPG|500px|ISO Motor Assembly]]
| + | |
| − | | + | |
| − | [[Image:motor_assembly_front.JPG|500px|Front Motor Assembly]]
| + | |
| − | | + | |
| − | [[Image:motor_assembly_top.JPG|500px|Top Motor Assembly]]
| + | |
| − | | + | |
| − | == '''Engineering Analysis''' ==
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Purpose of Engineering Analysis ==
| + | |
| − | '''
| + | |
| − | | + | |
| − | Engineering analysis can be used in the testing and design stages to help determine the most efficient and cost effective solution to the problem statement. The problem statement defines the scope of the problem faced. It helps focus the attention on the actual problem at hand. Making assumptions is vital in any engineering analysis to save time while not sacrificing accuracy. As long as the assumptions can be adequately justified, the calculations can be done without consequences. The diagram is used to obtain a visual representation of the problem at hand. It is important to list equations used in the engineering analysis to make it easier for others to decipher equations used in the calculations and decipher the concepts involved in the overall analysis. Calculations are needed to express quantitatively and qualitatively the results to solve the problem statement. The solution check verifies the correct usage of units and equations as well as defines reasonable boundaries for the result. The discussion section describes the quality of the assumptions made about the problem.
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Problem Statement ==
| + | |
| − | '''
| + | |
| − | Find the maximum velocity of the scooter around a turn of constant radius so that the tires will remain in contact with the ground without sliding
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Assumptions ==
| + | |
| − | '''
| + | |
| − | *Mass of the rider = 68 kg
| + | |
| − | *Mass of the scooter = 20 kg
| + | |
| − | *To obtain the μs,asphalt,dry, take the average of the range of μ values
| + | |
| − | *To obtain the μs,asphalt,wet, take the average of the range of μ values
| + | |
| − | *To obtain the μs,concrete,dry, take the average of the range of μ values
| + | |
| − | *To obtain the μs,concrete,wet, take the average of the range of μ values
| + | |
| − | *Radius of the turn is constant, thus a circular path
| + | |
| − | *Radius of the turn = 3 m
| + | |
| − | *Force of gravity is 9.8 m/s^2
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Diagrams ==
| + | |
| − | '''
| + | |
| − | Until the wiki server is fixed, all images are posted at sites.google.com/site/benbuzz790/pictures-for-wiki
| + | |
| − | | + | |
| − | | + | |
| − | '''
| + | |
| − | | + | |
| − | == Governing Equations ==
| + | |
| − | '''
| + | |
| − | *Fc = mv2/r
| + | |
| − | **Fc = Centripetal force [kg*m/s^2]
| + | |
| − | **m = Mass [kg]
| + | |
| − | **v = Velocity [m/s]
| + | |
| − | **r = radius [m]
| + | |
| − | *fs = μsN
| + | |
| − | **fs = Force of static friction [N]
| + | |
| − | **μs = Static friction coefficient []
| + | |
| − | **N = Normal force [N]
| + | |
| − | *W = mg
| + | |
| − | **W = Weight [N]
| + | |
| − | **m = Mass [kg]
| + | |
| − | **g = Force of gravity [m/s^2]
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Calculations ==
| + | |
| − | '''
| + | |
| − | | + | |
| − | '''Rubber -> Asphalt (Dry)''' μs in range of .5 - .8
| + | |
| − | | + | |
| − | Average μs = (.5 + .8)/2
| + | |
| − | | + | |
| − | Average μs = .65
| + | |
| − | | + | |
| − | '''Rubber ->Asphalt (Wet)''' μs in range of .25 - .75
| + | |
| − | | + | |
| − | Average μs = (.25 + .75)/2
| + | |
| − | | + | |
| − | Average μs = .5
| + | |
| − | | + | |
| − | '''Rubber -> Concrete (Dry)''' μs in range of .6 - .85
| + | |
| − | | + | |
| − | Average μs = (.6 + .85)/2
| + | |
| − | | + | |
| − | Average μs = .725
| + | |
| − | | + | |
| − | '''Rubber -> Concrete (Wet)''' μs in range of .45 - .75
| + | |
| − | | + | |
| − | Average μs = (.45 + .75)/2
| + | |
| − | | + | |
| − | Average μs = .6
| + | |
| − | | + | |
| − | ----------------------------------------------------------
| + | |
| − | | + | |
| − | N = W
| + | |
| − | | + | |
| − | W = (m,rider + m,scooter)*g
| + | |
| − | | + | |
| − | N = (m,rider + m,scooter)*g
| + | |
| − | | + | |
| − | Fr = μs*(m,rider + m,scooter)*g
| + | |
| − | | + | |
| − | ((m,rider + m,scooter)*v2)/r = μs*(m,rider + m,scooter)*g
| + | |
| − | | + | |
| − | v = sqrt(r* μs*g)
| + | |
| − | | + | |
| − | -----------------------------------------------------------
| + | |
| − | | + | |
| − | '''Rubber -> Asphalt (Dry)'''
| + | |
| − | | + | |
| − | v = sqrt((.3 m)*(.65)*(9.8 m/s^2))
| + | |
| − | | + | |
| − | v = sqrt(1.911 m^2/s^2)
| + | |
| − | | + | |
| − | v = 1.38 m/s
| + | |
| − | | + | |
| − | '''Rubber -> Asphalt (Wet)'''
| + | |
| − | | + | |
| − | v = sqrt((.3 m)*(.5)*(9.8 m/s^2))
| + | |
| − | | + | |
| − | v = sqrt(1.47 m^2/s^2)
| + | |
| − | | + | |
| − | v = 1.21 m/s
| + | |
| − | | + | |
| − | '''Rubber -> Concrete (Dry)'''
| + | |
| − | | + | |
| − | v = sqrt((.3 m)*(.725)*(9.8 m/s^2))
| + | |
| − | | + | |
| − | v = sqrt(2.1315 m^2/s^2)
| + | |
| − | | + | |
| − | v = 1.46 m/s
| + | |
| − | | + | |
| − | '''Rubber -> Concrete (Wet)'''
| + | |
| − | | + | |
| − | v = sqrt((.3 m)*(.6)*(9.8 m/s^2))
| + | |
| − | | + | |
| − | v = sqrt(1.764 m^2/s^2)
| + | |
| − | | + | |
| − | v = 1.33 m/s
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Solution Check ==
| + | |
| − | '''
| + | |
| − | | + | |
| − | *The units cancel to the correct units for the final answers
| + | |
| − | *The velocities seem reasonable given the weight of the rider, the coefficients of friction, and general knowledge
| + | |
| − | | + | |
| − | '''
| + | |
| − | == Discuss and Interpret ==
| + | |
| − | '''
| + | |
| − | | + | |
| − | From data found on various websites, the values of μ were tabulated. The values of μ for each scenario (i.e. concrete/dry, asphalt/wet) had a range. Instead of using the range of μ, the average was calculated by adding the two limits and dividing by two. By looking at the free body diagram of the scooter, it is clear that the normal force N is equal to the weight W of the scooter. This equation would change had turn been banked at an angle. The weight of the system is equal to the mass of the rider added to the mass of the scooter and multiplied by the force of gravity. Because the weight is equal to the normal force, the normal is set equal to the value of W. Using the equation f = μ*N and using the new normal force N that was calculated, the force of friction can be obtained. By using the equation v = sqrt(r* μs*g), the velocity can be calculated for each coefficient of friction. After plotting the values of velocity versus the values of the coefficient of friction, it is seen that the two are linearly related; when fitting the linear curve, there is an R2 value of .9984. The value of R2 should be as close to 1 as possible and it is clear that this is a valid curve fit.
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| − | Using these calculated velocities, the rider can determine what the maximum riding velocity is for various weather conditions and surfaces. These velocities can be calculated for any surface where there exists data for a coefficient of friction between that surface and rubber.
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| − | [[Image:AnalysisChart.JPEG|500px|Analysis Chart]]
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| − | == Works Cited ==
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| − | *"Coefficient of Friction Reference Table - Engineer's Handbook." Mechanical Engineering Design Guide - Engineer's Handbook. Web. 10 Nov. 2009. <http://www.engineershandbook.com/Tables/frictioncoefficients.htm>.
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| − | == '''Steps for Reassembly''' ==
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| − | == Difficulty Scale ==
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| − | *Difficulty = 1
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| − | **Straightforward reassembly
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| − | **Minimal force required with or without tool
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| − | *Difficulty = 2
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| − | **Requires intuition and planning
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| − | **Has multiple steps involved to reattach
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| − | *Difficulty = 3
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| − | **Require excessive force to attach
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| − | **Difficult to attach even with tools
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| − | **Requires critical thinking to attach
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| − | == Controller Reassembly ==
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| − | [[Image:Controller.JPG|300px|right|thumb|Controller Reassembly]]
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| − | *With four screws reassemble the controller's shell (Difficulty: 1)
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| − | **Screw on the top to the middle compartment
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| − | **Screw on the bottom to the middle compartment
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| − | **Put the controller back in its compartment
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| − | ***Note: Putting the controller back into its compartment was difficult because the wires were hard to fit in with the controller
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| − | **Screw the black component using two screws back into the main frame to hold controller in its housing
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| − | == Motor Reassembly ==
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| − | [[Image:MotorReassemble.JPG|300px|right|thumb|Motor Reassembly]]
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| − | *Screw 4 long Phillips head screws into motor (Difficulty: 1)
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| − | *Connect motor to the main frame by screwing it on with four screws (Difficulty: 2)
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| − | **Run the wire from the motor to the controller box
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| − | **Put wire from motor through the base where the battery is housed
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| − | **Connect the wire from motor to the control box
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| − | ***Note: When connecting the motor to the frame, we had to make sure we could fit the chain and chain guard around it as well
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| − | == Wheel Reassembly ==
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| − | [[Image:WheelReassemble.JPG|300px|right|thumb|Wheel Reassembly]]
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| − | *Front Wheel Reassembly (Difficulty: 2)
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| − | **Put the brake disk on the wheel
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| − | ***Line the three holes on the brake disk with the three holes on the wheel
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| − | ***Connect the brake disk to wheel by screwing in three screws
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| − | **Run axle through front wheel
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| − | **Slide the wheel and axle into the the slot on main frame to tighten into place
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| − | **Put on the washers
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| − | **Connect front wheel to the scooter by screwing in two hex nuts, one on each side
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| − | *Rear Wheel Reassembly (Difficulty: 3)
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| − | **Put the gear onto the rear wheel
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| − | ***Line the three holes on the gear with the three holes on the wheel
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| − | ***Connect the gear to wheel by screwing in the three screws
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| − | **Run the axle through the rear wheel
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| − | ***Chain is already over motor
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| − | **Put the chain over the gear
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| − | **Slide the wheel into the back slot making sure the axle is even on both sides
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| − | **Pull back on the wheel in the slot until the chain is taught
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| − | **Connect the rear wheel to the scooter by bolting it with two hex nuts one on each sides (making sure the tension in the chain is not too tight or too slack)
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| − | **Connect chain guard
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| − | ***Slide the chain guard through the slot by the motor from the back of the frame
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| − | ***Screw into frame
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| − | == Handlebar Reassembly ==
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| − | [[Image:handlebarpic.JPG|300px|right|thumb|Handlebar Reassembly]]
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| − | *Put the horizontal handlebar into the slot on the vertical handlebar (Difficulty: 1)
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| − | **Put the clamp over the top of the bar so it lines up with the two holes
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| − | **Screw it down with the two screws to hold the horizontal bar in its position
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| − | *Slide the reflector onto the horizontal handlebar and screw it in place to prevent from sliding (Difficulty: 1)
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| − | *Slide throttle onto the horizontal handlebar (Difficulty: 1)
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| − | **Screw throttle onto the horizontal handlebar using an Allen Wrench to tighten
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| − | *On the opposite side of the horizontal handlebar, slide the braking device onto the horizontal handlebar (Difficulty: 1)
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| − | **Tighten by fitting hex nut into position on one side and screwing the screw on the other side
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| − | *Connect handlebar to the scooter (Difficulty: 2)
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| − | **Fit the bottom through the hole in the frame by the wheel
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| − | **Tighten the bolt using a wrench to keep the handlebar from turning
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| − | *Attach the brake pad to the main frame (Difficulty: 2)
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| − | **Screw the two hexagonal Phillips head screws into the main frame holes
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| − | **Place the steel wire attaching the brake to the pad through the two holder components
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| − | **Tighten the screw to hold the steel wire in place
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| − | == Seat Reassembly ==
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| − | [[Image:SeatReassemble.JPG|300px|right|thumb|Seat]]
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| − | *Reassemble Brace (Difficulty: 2)
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| − | **Slide inner clamps into the base
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| − | **Put axle through the brace
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| − | **Slide outer clamps into the base
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| − | **Slightly tighten with the two hex-nuts on both sides
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| − | **Insert metal seat post into the brace
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| − | **Tighten both hex-nuts all the way
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| − | *Put Seat Component onto Main Bar (Difficulty: 1)
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| − | **Slide the vertical seat component into base
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| − | **Tighten hex nuts to clamp vertical seat component to main frame
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| − | *Screw two screws into vertical seat component (Difficulty: 1)
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| − | == Plastic Covering Reassembly ==
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| − | [[Image:PlasticCovering.JPG|300px|right|thumb|Plastic Covering]]
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| − | *Attach the back plastic covering to the frame (Difficulty: 1)
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| − | **Screw three Phillips head countersunk screws into frame
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| − | **Screw two round-top Phillips head screws into the back-most part of the frame
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| − | *Attach the front plastic covering to the frame (Difficulty: 1)
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| − | **Slide the flat battery covering into the slots from the back plastic covering
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| − | **Screw the Phillips head countersunk screw into to frame
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| − | '''
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| − | =='''Reassembly Questions'''==
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| − | '''
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| − | ==Does the product run the same as it did before you disassembled it?==
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| − | '''
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| − | Before we disassembled the product, it did not run because the battery and charger were not included with the scooter. We did not purchase or construct any sort of battery or charger, so there is still no way to power the scooter. We did not and still do not have any way to test how well the scooter functions. As far as we can tell, the scooter runs exactly the same as it did before.
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| − | '''
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| − | ==What were the differences between the disassembly, reassembly processes?==
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| − | '''
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| − | The biggest change is that previously we were careful to make sure we remembered where everything went, but now we were struggling to remember where anything came from. Other than that, the reassembly was, for most components, the disassembly backwards. There were a few tricks, though. The rear wheel, axel, chain, and chain guard system became a puzzle of near-Rubik magnitude. We remembered, for the most part, how the wheel and axel came off, and how the chain guard was on the scooter, but it seemed necessary to put them all on simultaneously in order to get it back to its original condition. We tried 4 different permutations of order of reassembly before we finally found a way to do it.
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| − | All the tools used to disassemble the scooter were used to reassemble it, and no additional tools were necessary.
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| − | Although we had trouble in some places during reassembly, we managed to get the entire scooter reassembled and back into the condition in which we received it.
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| − | == '''Oral Presentation''' ==
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| − | [[Image:Slide1.JPG|500px|left|thumb|Introduction]]
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| − | [[Image:Slide2.JPG|500px|center|thumb|Specifications]]
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| − | [[Image:Slide3.JPG|500px|right|thumb|How the Scooter Works]]
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| − | [[Image:Slide4.JPG|500px|left|thumb|Challenges Faced]]
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| − | [[Image:Slide5.JPG|500px|right|thumb|Design Revisions]]
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Our product is a dual-wheeled electric scooter that has an electric motor. Our scooter was created with the intent of serving as a recreational vehicle
The product is primary for home use by teenagers and young adults. It is possible that some people will use the scooter in a professional manner to travel to their place of work. For the most part, the product will be used by children and adolescents for fun, or in place of other similar transportation, such as a bicycle.
The most basic function of the electric scooter is transportation. People who own the scooter will most likely use it as an object for entertainment rather than a reliable source of transportation. In most cases, it will be utilized for short neighborhood travel, and other leisure activities that involve travel over relatively short distances.
