Design Review #2 1/20/07

Arm:

- test motors in parallel
- mock up gear ration for 2nd link
- move sprockets between the 2 bars so it's not cantilevered
- chain guard
- chain tensioner
- pnumatic cylinder
-where to mount?
-what stroke?
Mr. Sambyal: "It's a simple design"
Mr. Rock: "I like it!"

Arm code:

- #1 cause of failure will be the sensors don't work (sensor breaks or messes up)
- have a switch to change from sensor to manual drive mode
- control logic = drive error to 0, use damping or derivatives, ask Mr. Rock for help when we get there

Clutching

- if both the control loop works and the motors are geared correctly it shouldn't be necessary
- worm gear
    - less efficiency
    - easier
-break pad
    - more complex
    - more motor and actuator stuff
- avoid pins and holes
- spring loaded de-tense
    - a spring loaded pin jammed into the sprocket teeth, which only the motor is strong enough to pull out of
- have an operator disable break option
- buy bike break from local bike shop

Grabber

- harder to hold horizontal
- material?
- That beefy!? Use thin wall tubing, make lighter
- KEEP IT LIGHT
- herding guides
- do you lower the arm then drop or just drop?
- how do you drop if the bottom jaw can't move?
- to despoil, have a little stick "flip" spoilers off

Encoder

- complicated if you're monitoring (quad code)
- you're in trouble if you miss counts
- interrupt based code

Other suggestions

- Practice driving last year's robot with arm
- Make a computer program to calculate the most strategic location to place ringers and spoilers
- estimate speed of putting on a ringer

News

Be sure to come to F108 during lunch on February 2 for an important meeting regarding regionals!

Since build is underway, please check the Snack Schedule to find out which week you are assigned to bring snacks.

Check out the Breakout Game Review presented during kickoff to learn more abou this year's game.

Watch the NASA webcast of the live kickoff in Manchester.

Please remember to check our calendar for updates regarding other upcoming events.

Important Links

MVRT Forums

MVRT Blog

Chief Delphi Forums

McMaster-Carr Supply

NI Robotics

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