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| | === [[Engineering Analysis]] === | | === [[Engineering Analysis]] === |
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| − | Problem Statement:
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| − | If you use a 400 ft extension cord for the power sander, will that 400 foot extension cord be enough to power the Ryobi power sander.
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| − |
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| − | Diagram:
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| − | [http://img405.imageshack.us/img405/8247/jpgcity.jpg]
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| − |
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| − | Assumptions:
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| − | *For the sander to run it needs 120 volts
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| − | *The sander will not be able to run with 60 volts supplied from the cord
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| − | *The current for the sander to run is 1.2 A
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| − | *The radius of the extension cord is 1.5 mm
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| − | *The extension cord is made out of copper
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| − | *The temperature is 20 degrees Celsius
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| − | *The resistivity is 1.62 x 10-8
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| − | *The cord is made out of copper
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| − |
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| − | Governing Equations:
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| − | *R = V/i
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| − | *R = (resistivity) * (L/A)
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| − | *A = π*r^2
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| − |
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| − | Solution:
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| − |
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| − | R = V/i
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| − | R = 60/1.2 = 50 ohms R = (resistivity) * (L/A)
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| − | A = 3.14 * .00152 50 = (1.62 x 10-8) *(L/7.07x10-6)
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| − | L = 71,590 ft
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| − |
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| − | 400ft < 71,590ft So the 400 ft extension cord would be enough to power the Ryobi power sander.
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| − |
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| − | Discussion:
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| − |
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| − | The 400 foot extension cord would be able to deliver enough power to the power sander. The 400 foot extension cord won’t be enough because it would take 71,590 feet of extension cord until the power sander wouldn’t be able to have enough power to run. This is true only under the assumption that the power sander would not work at 60 volts. However any higher voltage that the sander would not work at would mean the length of the cord would be less than 71,590 ft.
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| | == Gate 4 == | | == Gate 4 == |
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| − | === Assembly ===
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| | | | |
| | + | === [[Product Reassembly Plan]] === |
| | | | |
| − | ==== RYOBI Battery-Powered Corner Sander ====
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| | | | |
| | + | === [[Reassembly Review]] === |
| | | | |
| − | {| style="width:100%; height:100px" border="1"
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| − | |-
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| − | | align="center" style="background:#f0f0f0;"|'''Step'''
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| − | | align="center" style="background:#f0f0f0;"|'''Description'''
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| − | | align="center" style="background:#f0f0f0;"|'''Easiness'''
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| − | | align="center" style="background:#f0f0f0;"|'''Tools Used'''
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| − | | align="center" style="background:#f0f0f0;"|'''Pictures'''
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| | | | |
| − | |- | align="center"
| + | === [[Product Recommendations]] === |
| − | | 1||Place the electric motor and switch assembly into the housing so that the spindle is placed into the lube. This part is fitted into the casing. The wires should be tucked into the outer parts of the housing so they will not be pinched when it is put together. ||1||Hands||[[Image:P1000630.JPG|150px|thumb|Casing and Motor]]
| + | |
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| − | |- | align="center"
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| − | | 2||Place the black switch in it\'s fitted housing next to the motor. Then place the yellow on/off switch over the black one.||1||Hands||[[Image:P1000633.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |- | align="center"
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| − | | 3||Place the small metal clip against the yellow switch to stabalize the switch.||3||Hands||[[Image:P1000631 - Copy (2).JPG|150px|thumb|Metal Clip]]
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| − |
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| − | |- | align="center"
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| − | | 4||Place the gears and bearing with counterweight into its fitted spot in the housing. The gears should be able to now spin the spindle.||1||Hands||[[Image:P1000636.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 5||Place the two white connectors into the housing. The smaller one fits in below the switch assembly. If looking at the sander with the motor to the top right, the larger connector will be placed about an inch to the left of the gears in it\'s fitted spot. ||1||Hands||[[Image:P1000638.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 6||Slide the other casing onto the casing with the motor, gears, and switch assembly. It should match up so that connectors go into their fitted spots. The connectors should now be seen on the botton of the sander. ||2||Hands||[[Image:P1000638.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 7||There are eleven Phillips head #2 screws that need to be screwed onto the outer casing. There are designated holes for the screws, and they are the only holes on the sander.||2||Phillips head #2 screw-driver||[[Image:P1000630.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 8||This is the orange piece that can be taken out by hand. It is located along the handle next to the rubber grip||1||Hands||[[Image:P1000630.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 9||Snap the velcro pad housing onto the bottom of the sander. It snaps on using the connectors. ||1||Hands||[[Image:P1000630.JPG|150px|thumb|Casing and Motor]]
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| − |
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| − | |-| align="center"
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| − | | 10||There are five phillips head #2 screws that need to screw the sand-paper velcro pad onto the sander.||2||Phillips head #2 screw-driver||[[Image:P1000630.JPG|150px|thumb|Casing and Motor]]
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| − | |-
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| − | |
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| − | |}
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| − |
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| − |
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| − | ==== RYOBI Corner Sander ====
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| − |
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| − | {| style="width:100%; height:100px" border="1"
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| − | |-
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| − | | align="center" style="background:#f0f0f0;"|'''Step'''
| |
| − | | align="center" style="background:#f0f0f0;"|'''Description'''
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| − | | align="center" style="background:#f0f0f0;"|'''Easiness'''
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| − | | align="center" style="background:#f0f0f0;"|'''Tools Used'''
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| − | | align="center" style="background:#f0f0f0;"|'''Pictures'''
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| − |
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| − | |-| align="center"
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| − | | 1||Slide the field assembly over the armeture. The wires for the switch should be on the opposite side of the vacuum fan as seen in the picture.||1||Hands||
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| − | |-| align="center"
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| − | | 2||Attach the switch to the field assembly. This is done by connecting it to the fitted connector of the red wire. ||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 3||Connect the black wire coming from the power supply cord to the switch.||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 4||Place one brush into the connector coming from the white cord of the power supply. Place the other brush into the connector coming from the black cord of the field assembly.||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 5||Place the two white connectors into the housing. The smaller one fits in below the switch assembly. If looking at the sander with the motor to the top right, the larger connector will be placed about an inch to the left of the gears in it\'s fitted spot. ||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 6||Everything assembled thus far will fit onto the casing. The field assembly has a fitted spot in the center of the casing, everything else attached dwill fall into it\'s fitted spot. ||1||Hands||
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| − | |-| align="center"
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| − | | 7||The orange on/off switch lays in next to the switch assembly||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 8||The black fan baffle fits in over the sand vacuum. The curved edges will fit onto the housing properly.||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 9||Place the two white connectors into the housing. The smaller one fits in below the switch assembly. If looking at the sander with the motor to the top right, the larger connector will be placed about an half an inch to the left of the field assembly in it\'s fitted spot. ||1||Hands||
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| − |
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| − | |-| align="center"
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| − | | 10||Place the second part of the housing onto the connectors. Wires must be placed in designated areas. There are teeth that will catch the wires to keep them in place. ||4||Hands||
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| − |
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| − | |-| align="center"
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| − | | 11||Screw the two cord clamp screws over the cord where it meets the sander. ||2||Phillips Head #2 screw-driver||
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| − |
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| − | |-| align="center"
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| − | | 12||Screw in both of the external screws to connect both casings. These screws are located underneath where the grip will be.||2||Phillips Head #2 screw-driver||
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| − |
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| − | |-| align="center"
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| − | | 13||Place the grip on top of the sander. Fasten the three top cover screws. ||2||Phillips Head #2 screw-driver||
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| − |
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| − | |-| align="center"
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| − | | 14||Place the velcro pad housing onto the bottom of the sander and use the 4 velcro pad housing screws to fasten it.||2||Phillips Head #2 screw-driver||
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| − |
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| − | |-| align="center"
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| − | | 15||Place the velcro pad onto the velcro pad housing and use 5 of the velcro pad housing screws to fasten it onto the velcro pad housing.||2||Phillips Head #2 screw-driver||
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| − |
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| − | |-| align="center"
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| − | | 16||Fit the vacuum bag over the vacuum exhaust coming out the back of the sander as seen in the picture.||1||Hands||
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| − | |-
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| − | |
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| − | |}
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| | | | |
| | == References == | | == References == |
| | | | |
| | [http://www.ereplacementparts.com/ Ryobi Corner Cat Power Sander Parts (model #CFS1502)] | | [http://www.ereplacementparts.com/ Ryobi Corner Cat Power Sander Parts (model #CFS1502)] |
| | + | |
| | + | [http://www.ereplacementparts.com/ Ryobi Battery-Powered Corner Sander Parts (model #P400)] |
For the MAE 277 reverse engineering project, our group was given two electric
powered RYOBI corner sanders (Model #’s P400 & CFS1502). One of the sanders
is powered by an electric cord and the other is battery-powered. Throughout the
semester, we will be dissecting and analyzing the components that make these two
products work. We will then compare the different results for the two sanders to
figure out which one is more efficient than the other.
