Group 16 - DeWalt 4 1/2 in Angle Grinder Gate 4 - Revision history

MAE 277 2012 - Group 16: /* Attachment Connections */

2012-12-13T20:50:20Z

Attachment Connections

MAE 277 2012 - Group 16: /* Adjustable Handle */

2012-12-13T20:35:41Z

Adjustable Handle

MAE 277 2012 - Group 16: /* Changeable Gear Box */

2012-12-13T20:21:05Z

Changeable Gear Box

MAE 277 2012 - Group 16: /* Changeable Gear Box */

2012-12-13T20:20:15Z

Changeable Gear Box

MAE 277 2012 - Group 16: /* Mechanisms */

2012-12-13T20:04:46Z

Mechanisms

MAE 277 2012 - Group 16: /* References */

2012-12-10T02:06:15Z

References

MAE 277 2012 - Group 16: /* References */

2012-12-10T02:05:58Z

References

MAE 277 2012 - Group 16: /* Design Revisions */

2012-12-09T22:49:21Z

Design Revisions

MAE 277 2012 - Group 16: /* Adjustable Handle */

2012-12-09T22:48:29Z

Adjustable Handle

MAE 277 2012 - Group 16: /* Adjustable Handle */

2012-12-09T22:46:39Z

Adjustable Handle

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 The new design for connecting attachments will address both societal and economic factors.
-Global Factors:
+''Global Factors'':
 *This design revision will not have a significant impact on any global factors.
-Societal Factors:
+''Societal Factors'':
 *The user will be able to change attachments quicker and easier.
 *Since there will be no clamp nut on the outside of the grinding wheel, the user will have an easier time grinding materials because the entire face of the grinding wheel can be used.
-Economic Factors:
+''Economic Factors'':
 *The cost of the angle grinder and attachments will increase slightly, but is justified by the benefits this new system will provide.
 *Because this attachment method will not allow current grinding wheels and other attachments to be used, consumers must buy DeWalt attachments, thus increasing the profits made from selling this type of angle grinder.
-Environmental Factors:
+''Environmental Factors'':
 *The new system will result in less waste because almost all of the material on each grinding disc will be used, instead of having some leftover amount that is disposed of each time.
 ==References==

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 The primary concerns behind this new design will be global, societal, and economic.
-Global Factors: The system design will be very intuitive, as the user just pulls on the handle and slides it where they want. This means some simple symbols or no instructions at all will be required for use. This will allow the product to be used in many different locations by many people.
+''Global Factors'': The system design will be very intuitive, as the user just pulls on the handle and slides it where they want. This means some simple symbols or no instructions at all will be required for use. This will allow the product to be used in many different locations by many people.
-Societal Factors: The user will be able to do their work efficiently and easily, since they have now more options for changing the positioning of handle. In addition, the user will be able to set the handle further from the disc and/or hold the grinder more securely for some jobs, thereby increasing safety.
+''Societal Factors'': The user will be able to do their work efficiently and easily, since they have now more options for changing the positioning of handle. In addition, the user will be able to set the handle further from the disc and/or hold the grinder more securely for some jobs, thereby increasing safety.
-Economic Factors: This new design will cost slightly more to produce than the current design because extra machining will have to be done in order to create the track and add the spring. This cost will not be significant compared to the total price of the grinder, and therefore should not adversely affect sales.
+''Economic Factors'': This new design will cost slightly more to produce than the current design because extra machining will have to be done in order to create the track and add the spring. This cost will not be significant compared to the total price of the grinder, and therefore should not adversely affect sales.
-Environmental Factors: This revision will not use significantly more material or energy, and therefore should not change the environmental impact of this product.
+''Environmental Factors'': This revision will not use significantly more material or energy, and therefore should not change the environmental impact of this product.
 ====Attachment Connections====

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 '''GSEE Factors'''
-*'''Global'''
+*''Global''
 No new global factors.
-*'''Societal'''
+*''Societal''
 The new more intuitive design will make it easy for the user to swap out tools.
-*'''Economioc'''
+*''Economic''
 Now a user can expand their tool collection at a lower cost than before.
-*'''Environmental'''
+*''Environmental''
 No new environmental factors.

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 No new environmental factors.
+The only significant disadvantage of this product is the increase in material (and by extension, cost)will make the angle grinder's price rise. While it will be cheaper for a consumer to buy the new angle grinder and attachments than to buy all tools separately, there will be difficulty entering the market because many experienced professionals probably already own most of the additional tools they need. If this is the case, those professionals will opt for competitor's angle grinders just because they are cheaper. This problem will fade over time however, as people entering the market for the first time or those who need to replace many of their aging tools will opt for the revised DeWalt angle grinder because of its superior versatility.
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 ====Adjustable Handle====

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 Fg = Gear thrust
 *Fg = Fs x cos (e)
 ===Design Revisions===

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 ==References==
-*'''Title'''1800 Mechanical Movements, Devices and Appliances '''Author''' Gardner D. Hiscox
+*'''Title''':1800 Mechanical Movements, Devices and Appliances '''Author''': Gardner D. Hiscox
 *http://www.ehow.com

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 ====Adjustable Handle====
+[[File:Handle_Revisions.png|420px|thumb|right|The blue arrows show the positions where the handle will be able to lock in place after redesign]]
 For our next design revision we propose replacing the current handle with one that can rotate around the grinder in 45 degree increments. Currently, the handle can only be placed in two locations: one for left handed people, and one for right handed people. Either handle location is parallel to the grinding surface, which requires the user to hold the handle at an awkward position in order to use the grinder. Besides the discomfort this causes the user, holding the grinder at an awkward angle will also decrease the overall precision. By adding a truly adjustable handle system we will improve the overall functionality of the grinder by allowing the user to easily hold it at whatever angle they desire for the current job.