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2021-2022 FIRST Tech ChallengeBasic ‘Bot Guide for TETRIXPart 2 Game Specific

2 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificSponsor Thank YouThank you to our generous sponsors for your continued support of the FIRST Tech Challenge!Revision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game Specific 3Revision HistoryRevision1Date10/13/2021DescriptionInitial ReleaseContentsContents . 3Introduction . 5What is FIRST Tech Challenge?. 5Gracious Professionalism . 5Introduction to this Guide . 6About this Guide . 6Parts . 6Tips and Tricks . 6Computer Aided Design (CAD) . 6CAD Coloring Legend. 6Chassis Modifications . 7Step 1: Remove Screws & Nuts from Right Rail . 7Armature . 8Step 1: Add Tower Support. 8Step 2: Add Right Rail Screws & Nuts . 9Step 3: Add Channel Support . 10Step 4: Add Channel . 11Step 5: Add Additional Channel Support . 12Step 6: Add Lower Gear Set . 13Step 7: Add Upper Gear Set . 14Step 7: Continued to Show Front Detailed View . 15Step 8: Add Motor Mount . 16Step 9: Add Motor and Gear . 17Properly Meshing Gears . 18Step 10: Add Hand Extension . 19Step 11: Add the Servo Mount . 20Step 12: Add the Servo . 21Step 13: Add First Flat Bracket . 22Step 14: Add First Flat . 23Step 15: Add First L Bracket . 24Step 16: Add Second Flat . 25Step 17: Add Third Flat . 26Step 18: Add Second L Bracket. 27Gracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

4 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 19: Add Fourth Flat . 28Step 20: Add Second and Third L Bracket . 29Final Steps . 30What’s Next? . 30Visit the FIRST website for programming instructions and game rules. . 30Appendix A – Resources . 31Game Forum Q&A . 31Volunteer Forum. 31FIRST Tech Challenge Game Manuals. 31FIRST Headquarters Pre-Event Support . 31FIRST Websites . 31FIRST Tech Challenge Social Media. 31Feedback . 31Revision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game Specific 5IntroductionWhat is FIRST Tech Challenge?FIRST Tech Challenge is a student-centered program that focuses on giving students a unique andstimulating experience. Each year, teams engage in a new game where they design, build, test, and programautonomous and driver operated robots that must perform a series of tasks. To learn more about FIRST TechChallenge and other FIRST Programs, visit www.firstinspires.org.Gracious Professionalism FIRST uses this term to describe our programs’ intent.Gracious Professionalism is a way of doing things that encourages high-quality work, emphasizes thevalue of others, and respects individuals and the community.Watch Dr. Woodie Flowers explain Gracious Professionalism in this short video.Gracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

6 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificIntroduction to this GuideAbout this GuideThe Basic ‘Bot Guide is designed to be a resource for teams looking for a step-by-step instructional for buildinga basic armature for the FIRST Tech Challenge competition. There are multiple versions of this guide,previously called the “Push Bot Guide”. This version of the Basic ‘Bot Guide for TETRIX Part 2 (Armature)has been created to use the 2021-2022 season’s TETRIX kit of parts.Parts TETRIX FTC Competition Seto Tools included with the TETRIX FTC Competition SetElectronics Modules and Sensors setControl & Communication Set 1 or 2(Optional) Only the tools included in the FTC Competition Set will be needed to build the chassis. Thescrews and nuts are a standard size and having more tools may allow more students to participate atthe same time.(Optional) A ruler is not needed to build this robot, but it is necessary to make sure that the robot iscompetition ready.Tips and Tricks Make sure that set screws are installed in every axle hub, motor hub, and axle collar.Refer to the legend provided in the Kit of Parts, if any parts are unfamiliar.Make sure that all assemblies are square. It is hard to drive a crooked robot straight!The drive wheels are powered by two DC motors located on the back of the robot, which are relativelyheavy. This weight is needed to help the wheels grip the surface better.Omni wheels should be located on the front of the robot, which allows the robot to turn more easily.The omni wheels can slide sideways with very little friction due to the rollers.Unless otherwise noted, the top image in each step shows the necessary parts; the lower image showsthe completed assembly.Computer Aided Design (CAD) The drawings in this document were generated using Creo Parametric Computer Aided Design (CAD)software.o By designing on the computer first, with CAD, the design can be tested to ensure everything willwork together before actual construction.The Creo software is available for free to FIRST teams for use in designing robots. The CAD drawingscolor code the screws to help identify them (see table below).CAD Coloring LegendPitsco Part Number3909839094391113909739195Part5/16" socket head cap screwkeps nut3/8” button head cap screw1/2” socket head cap screwmotor mount screwColorredbluegreenyelloworangeRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game Specific 7Chassis ModificationsStep 1: Remove Screws & Nuts from Right RailParts Removed:39098 - 5/16" socket head cap screw (4)39094 - keps nut (4)Figure 1- Assembled viewFigure 2- Unassembled viewGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

8 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificArmatureStep 1: Add Tower SupportParts Needed:39270 - Inside C Connector (1)39098 - 5/16" socket head cap screws (4)39094 - keps nuts (4)Figure 3- Unassembled ViewFigure 4- Assembled ViewRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 2: Add Right Rail Screws & Nuts 9Parts Needed:39097 - 1/2" socket head cap screws (4)39094 - keps nuts (4)Figure 5- Unassembled ViewFigure 6- Assembled ViewHelpful Hint The original screws are replaced with longer screws.Gracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

10 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 3: Add Channel SupportParts Needed:39270 - Inside C Connector (1)39098 - 5/16" socket head cap screws (4)39094 - keps nuts (4)Figure 7- Unassembled ViewFigure 8- Assembled ViewRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 4: Add Channel 11Parts Needed:39067 - 160 mm Channel (1)39098 - 5/16" socket head cap screws (3)39094 - keps nuts (3)Figure 9- Unassembled ViewFigure 10- Assembled ViewGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

12 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 5: Add Additional Channel SupportParts Needed:39281 - Inside Corner Bracket (1)39098 - 5/16" socket head cap screws (3)39097 - 1/2" socket head cap screws (3)39094 - keps nuts (6)Figure 11- Unassembled ViewFigure 12- Assembled ViewRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game Specific 13Parts Needed:39111 - 3/8” button head cap screws (8)39086 - Gear 80 Tooth (1)39079 - Motor Hub (2)41665 - 6mm Plastic Bushing Spacer (4)40227 - 8mm x 6mm Bronze Bushing (2)44708 - 100mm x 6mm Axle (1)39028 - Gear 40 Tooth (1)Step 6: Add Lower Gear SetFigure 13- Unassembled ViewFigure 14- Assembled ViewHelpful Hint The order should be: 80 tooth gear, hub, spacers (2), brushing, spacers (2), 40 tooth gearGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

14 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 7: Add Upper Gear SetParts Needed:39079 - Motor Hub (2)41665 - 6mm Plastic Bushing Spacer (4)40227 - 8mm x 6mm Bronze Bushing (2)44708 - 100mm x 6mm Axle (1)39085 - Gear 120 Tooth (1)39097 - 1/2” socket head cap screws (4)Figure 15- Unassembled ViewFigure 16- Assembled View (Front Overview)Helpful Hint: The order should be: NO GEAR, hub, spacers (2), brushing, channel, brushing, spacers (2), hub, 120tooth gear, channelRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game Specific 15Step 7: Continued to Show Front Detailed ViewFigure 17- Assembled View (Front Detailed View)Figure 18- Assembled View (Back Detailed View)Gracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

16 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 8: Add Motor MountParts Needed:39089 - Motor Mount (1) (with included bolts and nuts)Figure 19- Unassembled ViewFigure 20- Assembled ViewHelpful Hint: The mount is on the vertical center of the channelRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 9: Add Motor and Gear 17Parts Needed:44260 - TorqueNADO Motor (1) (gear)39079 - Motor Hub (1)39028 - Gear 40 Tooth (1)39111 - 3/8” button head cap screws (4)Figure 21- Unassembled ViewFigure 22- Assembled ViewHelpful Hints: The motor should be plugged into port 2 The next page shows how to properly mesh gearsGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

18 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificProperly Meshing GearsThe following pictures show examples of meshing the gears. However please note, that these examplepictures are from a previous year’s robot. Figure 23 is too loose; Figure 24 is too tight; Figure 25 is a goodmesh.Figure 23- Gears are too loose, this is a bad meshFigure 24- Gears are too tight, this is a bad meshFigure 25- Gears are just right, this is a good meshHelpful Hint: To test the mesh, rotate the mechanism by hand. If the gear teeth slip, then it is too loose, if themechanism binds, then it is too tight.Revision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 10: Add Hand Extension 19Parts Needed:39098 - 5/16” socket head cap screw (4)41253 Stand-Off Post 6-32 x 16mm (4)Figure 26- Unassembled ViewFigure 27- Assembled ViewGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

20 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 11: Add the Servo MountParts Needed:41789 - Servo Mount from Mounting Kit (1)39273 - Flat 96mm x 27mm (1)39111 - 3/8” button head cap screw (4)Figure 28- Unassembled ViewFigure 29- Assembled ViewRevision 1:10.13.2021

FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 12: Add the Servo 21Parts Needed:39197 - 180 Standard-Scale HS-485HB Servo Motor (1)39097 - 1/2” socket head cap screw (4)39094 - keps nut (4)Figure 30- Unassembled ViewFigure 31- Assembled ViewHelpful Hint: The servo should be plugged in to port 0 with an extension cableGracious Professionalism - “Doing your best work while treating others with respect and kindness - It’s what makes FIRST, first.”

22 FIRST Tech Challenge Basic ‘Bot Guide for TETRIX-Part 2 Game SpecificStep 13: Add First Flat BracketParts Needed:39097 - 1/2” socket head cap screw (4)39197 - Metal Servo Horn from Servo Kit (1)39061 - Flat Bracket (1)39094 - keps nut (4)Figure 32- Unassembled ViewFigure 33- Assembled ViewHelpful Hint: Use the screw that comes with the Servo to secure the Servo Horn to the ServoRevision 1:10.13.2021