2011:Mechanical 2 1.29

Attendance

Start time: 10

End time: 8:30

Members present: Brianna M, Jake K, Alex W, Ethan M, Mr. K, Mr. W.

Members Attending Next Meeting:

Tasks Completed

• tested prototypes
  • compared folding v. telescoping arm
    • release mechanism - needs 1 person for folding arm, 2 for telescoping arm
    • telescoping - may stick inside, in case of being skewed is useless and unfixable
    • folding arm is overall better, as it has a harder time breaking, has less friction
    • both have a simple stopping mechanism that should work quite well - latch-fold pin-tele
    • NOTE: telescoping prototype did not work at all at first - telescoping part was too rough
    • Upper structure 85% done.
  • determined which arm to use(telescope or folding[scale 1-10 {1 worst 10 best}]

	folding	telescope
does it work	9	3.5
realibility(prototype or design error)	10	4
how much force can it take	9.5(prototype only 1 side of the latch was used, in final design both sides would be used, making the final design stronger)	N/A
how easy is it to reset	9	2 People failry easy
autonomous mode	N/A	N/A
speed, timing	9 (fast)	7
how easy is it to fix	9(outside plates and latches are the only things that might break. if they break they are very easy to replace)	7(arm could possibly break completly making it very hard to repair, unless you have a spare arm)
which one has the most play	similar	similar
release mechanism	9(1 person)	(2people)
speed of deployment	9	8
übertube loading	9(arm simply folds at the beggining of the match)	4(arm has to be tucked in all the way, could create problems)
total	82.5	43.5

Tasks In Progress

• Arm prototype latch tests: http://www.youtube.com/watch?v=CJdY1KuXMQw&safety_mode=true&persist_safety_mode=1

http://www.youtube.com/watch?v=Skjqu8gzZQ4&safety_mode=true&persist_safety_mode=1

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Tasks to Complete

• finalize dimensioning arm

Materials Needed

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