2007 TE Session Outline

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This is the outline for both the 2007 basic and advanced Technology Enrichment sessions.

Basic Sessions

These sessions are geared to new students and new teams.

Introduction

Date: 09/11/2007

  1. Welcome to 2007 TE Sessions and to Tech
    1. Info about RoboJackets
    2. Key people and contacts during the sessions
    3. Info about sponsors
    4. Info about this year vs. last year
    5. Show them where to get power points and materials on our site
      1. On our website in TE sessions (there will be a page for materials and such)
  2. What is a robot
    1. Types
  3. Robots in real life
    1. Applications
      1. Commercial / Industrial
        1. Roomba
        2. Kuka
      2. Government / Military
        1. Samsungs Sentry in the DMZ
        2. UAV's border patrol, communication, traffic reports
        3. Bomb defusing
        4. Rescue
      3. Research
        1. DARPA
        2. NASA
        3. Telescopes
      4. Robotics at tech
        1. Borg Lab
        2. RIM
        3. GTRI
        4. UAV Lab
        5. others
      5. Our robots
        1. Candi
        2. 1 or 2 RoboCup
  4. End with our goals and aspirations
    1. Take questions

Intro to Mechanical Engineering

Date: 09/18/2007 1. Force Balances 

     a. MATERIALS NEEDED:
             1. Arrow shaped force applicators
             2. pop can and weights
             3. spring steel strips and fixtures
             4. thin aluminum strips
             5. plastic strips
             6. poorly built box
             7. strong box
             8. Working Model demos
     b. Basics
             i.   Gravity (2 slides)
             ii.  equations F=sum(ma¬¬i) 2 slides
             iii. examples
                     1. pictures of point masses
                     2. pictures of airplane
                     3. crush a pop can
     c. Stresses
             i.   Bending (4 slides)
                     1. one point
                     2. multiple point
             ii.  Material basics (2 slides)
                     1. steel vs. aluminum
                     2. plastics and other
             iii. Examples
                     1. spring steel mounted in different ways
                     2. aluminum fatigue
                     3. plastic bending
     d. Building a decent box
             i.   Working Model™ demos of bad designs
             ii.  Shear loads (3 slides)
                     1. square with side loads on top
                     2. corner loads
                     3. triangles help!
             iii. Fastening (2 slides)
     e. Activity
             i.  Build a box with VEX kit material
                     1. focus on strength and weight
             ii. Box should be strong enough to put entire VEX kit on top and resist side loading

2. Rotation 

     a. MATERIALS NEEDED
                     1. Wheels
                     2. Shafts
                     3. Bearing setup
                     4. Bushing setup
                     5. Shaft collars
                     6. VEX demo
     b. Bearings vs. Bushings 
            1.	Wheel setups (4 slides)
                     a. Overhanging loads
                     b. Centered loads
                     c. Should wheels spin on shaft?
                     d. Should shaft spin in housing?
            2.	Types of bearings (2 slides)
                     a. Radial 
                     b. Thrust
            3.	Forces bearings can resist (2 slides)
                     a. Speed
                     b. Loading 
            4.	Bushing Applications (3 slides)
                     a. Slow moving rotations
                     b. Radial and thrust
                     c. Materials
            5.	Shaft Restraint (3 slides)
                     a. Set screws
                     b. Shaft Collars
                     c. Nuts 
                     c. VEX kit examples
    c.	Making square shafts spin in round holes (2 slides)
            1.	Intro to VEX parts
            2.	Physical examples
    d.	Activity
            i.	  Put wheels on your box to transport a load
            ii.  See if your box can support load while accelerating/decelerating to demonstrate dynamic loading.
            iii. Put wheels on sides too, to test overall robustness of design

Mechanical Power Transmission

Date: 09/25/2007

  1. What is power
    1. Physics
      1. Work x time = force x velocity
    2. Idea
      1. Make your motors useful
  2. Mechanisms
    1. Gears
      1. How they work
        1. Teeth
        2. Pitch diameter
    2. Ratio
      1. What it means
      2. How to calculate
        1. Teeth to teeth
    3. Belts
      1. Types
        1. V Belt
        2. Timing Belt
      2. How they work
        1. V Belt - Fits in a wheel that has groove
        2. Timing belt - Have notches
        3. Goal when using keep as much contact as possible between belt and wheel (sort of)
      3. How to calculate
        1. Diameter to diameter
    4. Chains and Sprockets
      1. How they work
        1. Links
        2. Master links
        3. Numbering (what it means)
        4. Standard sizes (lengths etc)
        5. Goal when using ...
      2. Big v. Small
        1. Big
          1. Stronger
          2. Less efficient
        2. Small
          1. Weaker
          2. More efficient
      3. How to calculate
        1. Diameter to diameter
    5. Pulleys
      1. How they work
    6. Special
      1. Rack and Pinion
        1. How they work
      2. Worm Gears
        1. How they work
  3. Advantages and Disadvantages of each
    1. Gears
      1. Weight
        1. You will be reducing them
      2. Location
        1. Motor is close to output
      3. Easier to work with
        1. Don't have to tension
    2. Belts
      1. Tensioning
      2. Location
        1. Motor can be much farther away from output
      3. Weight
        1. Don't need to remove mass
      4. Skipping
    3. Chains
      1. Tensioning
      2. Location
        1. Motor can be much farther away from output
      3. Slack
        1. Less efficient than gears
      4. Weight
        1. Don’t need to remove mass
    4. Special
      1. Rack and Pinion
        1. Linear motion
      2. Worm Gears
        1. High torque
          1. Cant back drive (in theory but teeth can break...)
  4. Demos
    1. Gears
      1. C4's Gearbox and Lego Demo
    2. Belts
      1. C4’s Panning Turret (ghetto)
    3. Chains
      1. C4's drive module
    4. Pulleys
      1. ?
    5. Special
      1. Rack and Pinion
        1. Lego
      2. Worm
        1. Lego
  5. Activities
    1. Build a gear box with a ratio of X (lego)
    2. Allow groups to come up and see C4’s various aspects.
    3. ??
  6. What to expect
    1. A combination of these on your bot (not just one)
    2. Be prepared to chop of some weight

Drive Types

Date: 10/02/2007

  1. Methods of motion
    1. Tank
    2. Swerve / Ackerman
    3. Swerve / Crab
    4. Omni
    5. Mecanum
  2. Advantages and Disadvantages of each
    1. Tank
      1. Advantages
        1. mechanically simple
        2. saves space
        3. zero turning radius
        4. high traction
      2. Disadvantages
        1. more turning effort/traction tradeoff
        2. single axis of motion
    2. Swerve / Ackerman
      1. Advantages
        1. mechanically simple
        2. low turning effort
        3. high traction
      2. Disadvantages
        1. large turning radius
        2. difficult to power all wheels
    3. Swerve / Crab
      1. Advantages
        1. Multi-axis motion
        2. zero turning radius
        3. high traction
        4. low turning effort
      2. Disadvantages
        1. complex control
        2. mechanically complex
    4. Omni drive
      1. Advantages
        1. mechanically simple
        2. zero turning radius
        3. multi-axis motion
      2. Disadvantages
        1. low traction
        2. complex controls
        3. expensive parts
    5. Mecanum
      1. Advantages
        1. mechanically simple (uses tank setup)
        2. zero turning radius
        3. multi-axis motion
        4. higher traction than omni drive
      2. Disadvantages
        1. complex controls
        2. expensive parts
  3. Demos (during presentation)
    1. RC Cars
    2. Robocup bases / video
    3. Mecanum forklift video
  4. Activities
    1. Drive demo vehicles through maze (time trials)

Manipulation

Date: 10/09/2007

  1. Arms
    1. Types
      1. single bar
      2. parallel bar
      3. telescoping
    2. Reach
      1. single joint range of motion (angular and linear)
      2. workspace (several joints)
    3. Stability
      1. Center of gravity
      2. static balance
      3. dynamic balance
  2. Conveyors
    1. Belts / rollers
      1. single / double belt systems
      2. enclosed conveyor system
  3. Demos
    1. Hand crank powered conveyors
    2. Unpowered linkages and joints
  4. Activities

Manufacturing and Safety

Date: 10/16/2007

  1. Design Tools
    1. Brainstorming
      1. Strategy
        1. Idea cloud
        2. Function tree
          1. Organizes possible robot functions during competition
      2. Robot designs
        1. Morphological chart
    2. Evaluation
      1. Objective weighting based on strategy
      2. Evaluation table
        1. considers importance of robot characteristics based on selected strategy
    3. Machinability (6 slides)
      1. Design parts that can be made
      2. Design parts to fit available materials
      3. Show design of one part
      4. Show manufacturable design of same part
    4. Drafting (5 slides)
      1. Importance of drawing accurately and well
      2. Drafting basics (dimensions and linetypes)
      3. CAD, why its good
      4. Proper dimensioning
      5. Demo of poorly drafted part
    5. Weight (3 slides)
      1. Weight removal
      2. Material selection
      3. Shape and weight considerations
      4. Building Successful Machines
    6. Technical Drawing
      1. Last step before fabrication
      2. Can use anything from simensioned sketchees to 3D models
      3. Important to shot not only individual part dimensions but also how it fits into the overall design
  2. Fabrication

Safety

  1. MATERIALS NEEDED:
    1. Old pair of safety glasses
    2. Ear protection
    3. Gloves
    4. Machined parts that demonstrate topics
  2. Safety
    1. Glasses (4 slides)
      1. Reasons to wear
      2. Times to wear
      3. Glasses vs. face shields
      4. Welding
      5. Demo (Pair of damaged glasses)
    2. Clothing and hair (3 slides)
      1. Shoes and shirts
      2. Pull hair back
      3. Gloves and types
    3. Ear protection (2 slides)
      1. Types
      2. Hazards
      3. Pass around different types
    4. Chemicals (3 slides)
      1. Paint and solvents
      2. Dust masks
      3. Gloves and skin protection
    5. Machinery dangers (4 slides)
      1. Don’t touch drill bits and moving parts
      2. Pinch points
      3. Parts may be hot
      4. Fixturing parts properly
    6. First Aid (3 slides)
      1. When to call for help & first aid kits
      2. Bleeding & Shock
      3. Broken bones & Falls
  3. Fabrication
    1. Drilling (6 slides) +video
      1. Use lubricants
      2. Proper speed for material
      3. Battery drills vs drill press
      4. Drill holes oversized for bolts
      5. Material thickness and chip removal
      6. Safety
    2. Cutting (7 slides) +videos
      1. Powered vs. manual
      2. Workpiece Material
      3. Bandsaws
      4. Rotary saws
      5. Hacksaws
      6. Milling
      7. Safety
    3. Grinding (7 slides) +video
      1. Reasons to grind
      2. Grinders
      3. Material removal is slow
      4. Heat buildup
      5. Grinding disc types
      6. Aluminum and steel
      7. Safety
    4. Milling and Turning (7 slides) + video
      1. Reasons to use mill or lathe
      2. CNC machining
      3. Precision
      4. Bits
      5. Show different bits and the cuts they produce
      6. Show lathed parts
      7. Safety
    5. Tapping (5 slides) + video
      1. Reasons to tap
      2. Tap sizes
      3. Material
      4. Tapping procedures
      5. Safety
  4. Activity
    1. Thoroughly design a complex device for manufacture.
    2. Draw pieces out by hand
    3. Describe fabrication processes involved

Pneumatic / Fluid Power

Date: 10/23/2007

Electrical Power

Date: 10/30/2007

Programming

Date: 11/06/2007

Success in FIRST / Cookout

Date: 11/10/2007

Advanced Sessions

Technical Design

Date:

  1. CAD vs. Solid modeler
    1. Autodesk AutoCAD
    2. Eagle CAD
    3. Autodesk Inventor
    4. UGS Solid Edge
    5. Dassult Systems CATIA
  2. Reading technical drawings
    1. Multi views
    2. Isometrics
  3. Properly dimensioned vs. bad
  4. Basics of Autodesk Inventor
    1. How to make a part
      1. Constraining sketches
      2. Extrusions / Cuts
      3. Holes
      4. Importance of placing holes for bolts
    2. Assembly
      1. Mating / Constraining
      2. Projecting geometry
    3. Output a drawing
      1. 3 view
      2. Placing dimensions
      3. What a machine shop might want from you

Motor Control

Date:

Adv. Mechanical Power Transmission

Date:

Topics in Autonomous Control

Date:

Machine Vision

Date:

Manipulation

Date: and (2 weeks)

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