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Mechanical - General 2018

Attendance

Note Info

Students
Mentors
Date & Time
Location & Author
  • Anna O.

  • Chris E.

  • 3/8/2018

  • 7 hours

  • Aquiferland

  • Ha T.


Work Completed

  • driver practice
  • diagnosed elevator problem: motor w/o encoder died
  • dt gearbox: washer holding in the pinion on the right side gearbox is low key rubbing on the dog gear. kind of affecting driving
  • started bob's design for ramps
    • inside of piston pivot scratched up --> difficult to put in / remove shaft
  • tested intake
    • get caught on inner frame corner, both versions
    • old intake worked alright for both orientation at 30psi
      • can't intake going at high speed
    • new intake intakes well in 13x13 but arms too wide to hold 11x13

Challenges

  • one of the 775pro elev died but no motor to replace it bc can't find last year's climber :(

Work for Next Meeting

  • Intake to do: cut new lexan arms, new back channel
  • Test feeder more. Is wider stance enough?  More changes needed?
    • modifications to try
      • adjust piston placement on feeder arm lexan
      • wider back channel --> move arm pivots further apart
      • actuate open/close arms
  • elev
    • replace motor (DONE)
  • Wait on this one -> Remove drive gearboxes so they can be converted to single speed.
  • Electrical
    • Plan on individually actuating ramps, since raising an unoccupied ramp makes it jump 2 feet in the air.
  • Ramps
    • Ramp work below probably on hold until design changes are finalized
    • Smoke(?) and surgical tubing and spectra line magic that needs to be implemented to have the robot actually rotate the lift cylinders into position and then lift one or two other robots
    • Get frisbee bot, weigh it down to 130 lbs and drive it on ramp, actuate it, remove it and repeat like 50 times. Need to prove the cover material will hold up and not break.
  • Continue bumpers
    • red set ready for numbers to iron on, staple and decide how to hang on robot.
    • Blue set:
      • make wood frames, measured from boards used on red ones. Also use same thicker brackets seen on red set
      • duct tape pool noodles to plywood. Get second person to compress the noodles so the material is snug after stapling. See picture Chris posted in #team slack today.
      • drape cloth over frames, cut
      • lay out where numbers go.  1 inch space between each letter, all of them carefully centered on each bumper.  Every side needs numbers - for front split the "40" and "90" on each side.
      • remove fabric and iron-on the numbers
      • wrap cloth carefully around bumper, snugly, folding corners nicely.
      • Staple fabric to plywood
    • attach L channel to plywood
    • drill some holes and make sure mounting/removing with pins is quick/easy
  • Testing
    • does intake rotate?
    • does intake intake?
    • does elevator lift smoothly?
    • does PID for elevator work as expected, dosn't slam it up or down, and doesn't over-accelerate? (<- for programming)
    • does cube fall out 
    • actual time for elevator to go full height & back
    • time takes for entire lifting routine (get on platform, deploy ramp, other robot climbs on, lift)
  • Pit Design
    • New pit wall for banner, sponsor stuff
    • Peg board for tools would be nice
  • Robot cart
    • execute Bryn and Jared's design, get er done
  • Make awards to give other teams?
  • Make buttons?
  • fix bars that constrict feeder
  • test and fix feeder

On Schedule?

heh