Gears, Chains, and Sprockets - VEX Robotics

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Build PhaseOverviewIn this phase, you experiment with different gear ratios using the test stand that you built in Unit 5.Phase ObjectivesAfter completing this phase, you will be able to:■■Describe the relationship between gearing, speed, and power.Incorporate VEX gears into a design.PrerequisitesBefore starting this phase, you must have:■■Completed Unit 6: Gears, Chains, and Sprockets > Think Phase.Have an assembled VEX motor test stand from the Unit 5: Speed, Power, Torque, andDC Motors > Build Phase.Related phase resources are:■■■Unit 1: Introduction to VEX and Robotics.Unit 4: Microcontroller and Transmitter Overview.Unit 5: Speed, Power, Torque, and DC Motors.46■Unit 6: Gears, Chains, and Sprockets
Required Supplies and SoftwareThe following supplies are used in this phase:SuppliesNotebook and penOne assembled VEX motor test stand from the Unit 5: Speed, Power, Torque, and DC Motors > Build PhaseWork surfaceSmall storage container for loose partsOptional: Autodesk Inventor Professional 2009VEX PartsThe following VEX parts are used in this phase:Quantity Part Number Abbreviations5 BEARING-FLAT BF10 NUT-832-KEPS NK10 SCREW-832-0500 S42 SHAFT-3000 SQ32 SHAFT-COLLAR COL1 SPACER-THICK SP21 SPACER-THIN SP11 VEX-12-TOOTH-GEAR G121 VEX-84-TOOTH-GEAR G842 WASHER-DELRIN WPActivity GearsActivityIn this activity, you add a single-stage gear reduction to the test stand from Unit 5 to enable the liftingof heavier objects.As you work on building this project, have some of your team members focus on expandingtheir expertise using Autodesk Inventor. Later in the curriculum, you will be challenged to come upwith your own creative solutions for robot design. You will save time and maximize your ability tocreate winning solutions if your team understands how to leverage the power of digital prototypesusing Inventor.Build Phase■47
Page 3 and 4: SuppliesSoftwareAn assembled the ge
Page 5 and 6: PhaseBuildStandardScience (NSES)Uni
Page 7 and 8: Think PhaseOverviewThis phase expla
Page 9 and 10: Spur GearsSpur gears have been used
Page 11 and 12: The driving torque applies some for
Page 13 and 14: Idler GearsGears can be inserted be
Page 15 and 16: Compound Gear RatioCompound gears a
Page 17 and 18: Chain DrivesSprockets and chains ar
Page 19 and 20: Create PhaseOverviewThis phase desc
Page 21 and 22: Icon Name DescriptionRectangularPat
Page 23 and 24: Example: Generated GearsIn the foll
Page 25 and 26: Enter data to design the gear set.I
Page 27 and 28: Exercise: Generate Spur GearsIn thi
Page 29 and 30: 12. To check your design again, cli
Page 31 and 32: 9. Press E to start the Extrude too
Page 33 and 34: 4. For Operation, select Cut.2. Exp
Page 35 and 36: 14. Click OK.3. Click again to crea
Page 37 and 38: Extrude the Sketch on the Back Face
Page 39 and 40: 7. For Count, enter 5.8. For Spacin
Page 41 and 42: Insert an iFeatureIn this section o
Page 43 and 44: Exercise: Animate a Gear AssemblyIn
Page 45: 9. Scroll back to SHAFT-3000:5. Rig
Page 49 and 50: 2. To complete the next step:■■
Page 51 and 52: 4. To complete the next step:■■
Page 53 and 54: Amaze PhaseOverviewIn this phase, y
Page 55 and 56: f. Set up the test stand between tw
Page 57 and 58: Figure 4: 36:60 ReductionFigure 5:
Page 59 and 60: STEM ConnectionsBackgroundThe Unite

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