Difference between revisions of "Power Scissors"

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(Parts)
('''Customer Requirements''')
Line 86: Line 86:
 
*Blades are sharp enough to cut different materials
 
*Blades are sharp enough to cut different materials
 
**Have a sharpening function
 
**Have a sharpening function
b. Easy to use
+
*Easy to use
  i.   Has a low weight
+
**Has a low weight
  ii.   Has a small size
+
**Has a small size
  iii.   Comfortable to hold
+
**comfortable to hold
  iv.   Wireless
+
**Wireless
  v.   Easily accessible buttom to start
+
**Easily accessible buttom to start
c. Aestheically Pleasing
+
*Aestheically Pleasing
  i.   More likely to be bought
+
**More likely to be bought
d. Long battery life, chargeable
+
*Long battery life, chargeable
e. Changeable blades for different materials to cut
+
*Changeable blades for different materials to cut
f. Doesn’t break if dropped
+
*Doesn’t break if dropped
  
'''Engineering Specifications'''
+
=='''Engineering Specifications'''==
1. Material for jaws is sharper than cutting materials strength.  This corresponds to E.
+
*Material for jaws is sharper than the intended material to cut
2. Battery Life is ______ long.  This correspsonds to D.
+
**Corresponds to blade sharpness
3. Force of scissors is greater than _____. This corresponds to A.
+
*Batteries last for 40 hours of use
4. Weight is less than _______ (5 lbs?). This corresponds to B. 
+
**Corresponds to long battery life
5. Scissors retain sharpness for _______ (amt of time).  This corresponds to A.
+
*Force of scissors is greater than 5N  
6. torque on motor is ______.  This corresponds to A. 
+
**Corresponds to ability to cut through material
7. External casing can withstand ______ force, to avoid being dropped.  This corresponds to F.
+
*Weight is less than 5 lbs   
8.      A certain percentage of people when surveyed said that the scissors are pleasing.  This corresponds to C.
+
**Corresponds to easy to use
 +
*Scissors retain sharpness for 40 hours of use
 +
**Corresponds to blade sharpness
 +
*Torque on motor is great
 +
**Corresponds to ability to cut through material
 +
*External casing can withstand force from being dropped
 +
**Corresponds to long-lasting
 +
*90% of people surveyed found the scissors pleasing
 +
**Corresponds to Aesthetically pleasing.

Revision as of 20:06, 30 January 2008

Contents

Power Scissors Dissection

Function

The primary function of the Power Scissors is to cut through different materials. There are two blades, the bottom one stays stationary, and the top blade moves rapidly, opening and closing. This action allows the tool to cut through different materials.


Parts

The table belows lists the components for the Black & Decker Power Scissors.

Table 1: Power Scissors Component List
Part # Part Name Category Function Material Picture
1 Motor Input Serves as Power Supply for blades
DVTray.jpg
2 External Casing Structural Component Protects internal components and holds them together Plastic
DVHousing.JPG
3 Jaws Ouput The bottom blade remains stationary, while the top blade moves continually up and down Steel
DVLargeStep.JPG
4 Battery Input Provide power to motor Wrapped in cardboard
DVDockMotor.JPG
5 Cam Motion Conversion This forces the bracket to move by translating rotation motion of the motor, to translational movement in the bracket. The bracket then causes the upper blade to open and close Plastic
DVRail.JPG
6 Screws Structural Holds Casing Together Metal
DVGears.JPG
7 Bracket Support element Ball and socket joint limits movement of jaws. The socket is ovular so it allows some movement of the jaws. Plastic
DVCPU.JPG
8 Button (spring) Motion Conversion Closes switch to start motor by closing circuit. Button – plastic

Spring – metal Switch - metal







Customer Requirements

  • Blades are sharp enough to cut different materials
    • Have a sharpening function
  • Easy to use
    • Has a low weight
    • Has a small size
    • comfortable to hold
    • Wireless
    • Easily accessible buttom to start
  • Aestheically Pleasing
    • More likely to be bought
  • Long battery life, chargeable
  • Changeable blades for different materials to cut
  • Doesn’t break if dropped

Engineering Specifications

  • Material for jaws is sharper than the intended material to cut
    • Corresponds to blade sharpness
  • Batteries last for 40 hours of use
    • Corresponds to long battery life
  • Force of scissors is greater than 5N
    • Corresponds to ability to cut through material
  • Weight is less than 5 lbs
    • Corresponds to easy to use
  • Scissors retain sharpness for 40 hours of use
    • Corresponds to blade sharpness
  • Torque on motor is great
    • Corresponds to ability to cut through material
  • External casing can withstand force from being dropped
    • Corresponds to long-lasting
  • 90% of people surveyed found the scissors pleasing
    • Corresponds to Aesthetically pleasing.