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CRABWISE
innovations
January 7 – 29
Deliverables
Nov 28-Dec 18

Task 1: Understanding the
problem

                  Immersion Story
Interview/observation          In order to
   Person with quadriplegianeeds of users
         of…                 understand…
    DaVinci Surgery armshortcomings of
Person with Quadriplegia Needs of users
    orthogonal systems
DaVinci Surgery Arm      Shortcomings of orthogonal
   TIRR wheelchairs (Monday, Jan
                         systems
    28)compatibility concerns
TIRR Rehabilitation Center   Compatibility with
(Monday, Jan 28th)           wheelchairs
Task 4a: Create linkages
 Linkages   designed in SolidWorks
Task 4a: Create linkages
 Assembled   joints in SolidWorks
Task 4b: Print and evaluate
viability for construction
2   linkages (1 joint) printed on 3-D printer




 Plastic   deemed viable for construction
Task 5a: Research Actuators
                                 Specifications
  Actuator
              Dimension(in)    Torque to Weight   Position
  Choices
              <[1.3x0.8x1.2]   ratio (oz) High    Sensing

Nema 8 Micro                5.7(@6v):2.82         Not built-in
Stepper      0.79x0.79x0.96          =            (but
motor                              2.02:1         accurate)
                               59.7(@6v):0.77     Built-in
HS-5085MG     1.14x0.51x1.18
                                        =         positional
Servo
                                     77.53:1      feedback
                                                  Built-in
HS-5065MG                    30.55(@6v):0.42
                                                  positional
Servo         0.92x0.45x0.94          =
                                                  feedback
                                   72.73:1
Task 5b: Purchase and Test
Selected Actuator
 Purchased   Hitec HS-
  5085 MG Servo
 Tested similar servo and
  potentiometer
Jan 30- Feb 19


Task 6: Create Programming to
Control the Arm
 Have begun learning arduino
  programming
 Created programming to control 1 servo
  and read 1 potentiometer
Jan 30- Feb 19


Task 7: Construct and test
prototype
 Works-like   prototype of joint:

     Models a hinge-connection method for
      joints of the arm
     Tests servo mounting strategy
     Allows a potentiometer to be used for
      positional feedback if required
Jan 30- Feb 19

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CrabWise Innovations (Deliverable 1/27/13)

  • 2. Nov 28-Dec 18 Task 1: Understanding the problem Immersion Story Interview/observation In order to  Person with quadriplegianeeds of users of… understand…  DaVinci Surgery armshortcomings of Person with Quadriplegia Needs of users orthogonal systems DaVinci Surgery Arm Shortcomings of orthogonal  TIRR wheelchairs (Monday, Jan systems 28)compatibility concerns TIRR Rehabilitation Center Compatibility with (Monday, Jan 28th) wheelchairs
  • 3. Task 4a: Create linkages  Linkages designed in SolidWorks
  • 4. Task 4a: Create linkages  Assembled joints in SolidWorks
  • 5. Task 4b: Print and evaluate viability for construction 2 linkages (1 joint) printed on 3-D printer  Plastic deemed viable for construction
  • 6. Task 5a: Research Actuators Specifications Actuator Dimension(in) Torque to Weight Position Choices <[1.3x0.8x1.2] ratio (oz) High Sensing Nema 8 Micro 5.7(@6v):2.82 Not built-in Stepper 0.79x0.79x0.96 = (but motor 2.02:1 accurate) 59.7(@6v):0.77 Built-in HS-5085MG 1.14x0.51x1.18 = positional Servo 77.53:1 feedback Built-in HS-5065MG 30.55(@6v):0.42 positional Servo 0.92x0.45x0.94 = feedback 72.73:1
  • 7. Task 5b: Purchase and Test Selected Actuator  Purchased Hitec HS- 5085 MG Servo  Tested similar servo and potentiometer
  • 8. Jan 30- Feb 19 Task 6: Create Programming to Control the Arm  Have begun learning arduino programming  Created programming to control 1 servo and read 1 potentiometer
  • 9. Jan 30- Feb 19 Task 7: Construct and test prototype  Works-like prototype of joint:  Models a hinge-connection method for joints of the arm  Tests servo mounting strategy  Allows a potentiometer to be used for positional feedback if required

Editor's Notes

  1. Unfinished deliverables from previous deliverables period
  2. 2 linkages (4th joint from proximal end) printed 10% densityScale?Other specs of print?Tested for viabilityMetal to plastic gluing (JB weld and …..)Drilling and Screwing (cracked with 10% density, worked well with 60% density)
  3. Next Deliverables Period—Started just a little
  4. Next Deliverables Period—started just a little
  5. Next Deliverables Period