1. MESA USA Prosthetic Arm Challenge 2.1- Revisions

2. GENERAL RULES
The device must have at least two artificial fingers, these fingers:
MUST open and close. Only one finger is required to move.
MUST grab and release the specific objects for each task. Teams may NOT use any other part of the prosthetic arm or parts of their own hand, wrist or arm to grab or release the objects.
MUST be controlled by an Arduino microcontroller which is programmed with the Arduino language (i.e. Arduino IDE, CodeBender, etc.).
2. The device must NOT be operated by either of the team member’s wrists, hands or fingers.
3. During a trial, team members may use their unencumbered hand to hold the bucket, crate, or dexterity testing device. These testing items are allowed to be rotated, but the bottom must remain in contact with the testing surface at all times.

3. GENERAL RULES (cont.)
Teams MUST complete the provided itemized budget sheet for their device and MUST provide documentation to support the prices listed.
Teams that do not conform to the General Rules will NOT be allowed to compete in the device performance, thus resulting in zero points for the device performance.

4. DISTANCE ACCURACY Now using 12 beanbags Step pyramid shaped target
No longer a relay, only one team member during each trial
Different team member each trial
1 minute time limit
Time ends when:
The team may call the end of the trial after any 3 (three) beanbags have been accurately tossed onto the target.
One minute has passed
No deduction for beanbags left in the bucket
Bonus for higher numbers thrown in

5. Diagram 1 (not to scale) 2 m .75 m = Working Area 1 m 1.25 m
30cm
= Working Area
= Launch Line
= Target Zone
= bucket
Diagram 1
(not to scale)
1.5 m
1.25 m
1 m
.75 m
.5 m
= meter stick
1.75 m

6. OBJECT RELOCATION
Table divided into 3 equal areas – approx. 60 cm each, end areas are TASK AREAS and CENTER IS THE VOID. One task area will be divided into 2 equal areas of approximately 60 cm x 37 xcm.
One is the Starting area and the other is the Finishing area.
OBJECTS – 1 each – composition notebook, 12” ruler, Pack of 100 index cards, empty .5 L bottle of water, unsharpened #2 Pencil, CD or DVD. (15 Points each)
In addition: 4 unidentified items. These objects will vary in size but will be no heavier than 500 g and would not require the artificial fingers to open wider than 3 inches to grasp, lift and release the object. (25 Points each)
Objective is to place items in the milk crate as fast as possible and then take them out again as fast as possible

7. Task Area
(60 cm)
The Void
Area 1
Working Area
74 cm
180 cm
Diagram 2

8. OBJECT RELOCATION (cont.)
Objects can only be taken over and back one at a time
Contestants unable to reach into crate may use a stool that they must provide themselves
Time: max 1 minute per trial
Different team member each trial
During the task, the team member will place the items into the container by lifting them only with the prosthetic device, carrying them over the “Void” and placing the item into the designated container

9. OBJECT RELOCATION (cont.)
The prosthesis must break the open plane of the crate before releasing an object.
An item must be released and the prosthesis must be fully outside of the open plane of the crate before attempting to remove the object.
Items that are dropped in the “Void”, outside the container or on the floor cannot be re-attempted. A penalty equal to the point value of the object will be assessed.
Any item held by the device when time is called will not count as an item returned to Task Area.

10. OBJECT RELOCATION (cont.)
15. The trial will end when any of the following occur:
The team may call time after and only after at least 5 items have been placed in the finishing area. The team may signal the end of the trial by calling out “done” or time”.
If the team is unable to move at least 5 objects in to the Finishing area they will be given the full time.
Or the judge will call “time” after one minute has passed.
Any item broken will not count as an item placed into the container. These items will be assessed a penalty for scoring purposes.
The judge will record the time needed to complete the task and the objects correctly placed in the finishing area.

11. DEXTERITY Time: 1 minutes per trial
The nut will be tightened using the Prosthetic, NO WRENCHES
At the end of time, digital calipers will be used to measure hex nut progress. Measurement will be made from the bottom of the hex nut to the bottom of the bolt
The testing board may be set at any angle for inserting the bolt but must remain in the testing area and the base must remain on the table.

12. DEXTERITY (cont)
5. Time will be marked when called by the team member or when time lapses.
Time can only be called after all 3 (three) hex bolts have been secured
Time will be measured in seconds (s). Full time will be given to teams that have not secured all 3 nuts on their corresponding bolts.
If a nut or bolt is dropped it may be picked up by the prosthetic or non-prosthetic hand and placed on the table outside the “Testing Device Area” to attempt again. If the item is not able to be placed on the table to try again, the trial will stop and a score will be given for what has been completed with a full trial time of 2 minutes

13. COMMUNICATIONS New items to be included
Discussion section of the Technical Paper:
Discussion of electronic hardware integration
Discussion of software development
Rubric updated
Design Features section of the Display:
Arduino Block Diagram of programming
Display reduced to 1 trifold in size. 48”x36” Poster for Nationals