Radio Shack Mobile Robot manual Front Wheel Assembly

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Front Wheel Assembly

A picture is worth a thousand words – so take a look at the drawings below before starting to building the front wheel assembly. First locate the front wheel which has a threaded bore and a red mark on the hub. Screw the threaded front axle into the wheel so that one side of the axle protrudes about 1/2 inch from the wheel’s hub. Follow the assembly summary below while looking at the drawings. If you bend the whisker wires in this process don’t worry, we’ll fix them later.

Summary:

￿

￿￿ Locate the wheel with the threaded bore. It has a red mark on the hub.

￿￿ Thread the front axle through the wheel so that it protrudes 1/2“ on one side.

￿￿ Don’t damage the threads on the axle!

￿￿ On the short axle side, slide on a star washer and screw on the coupling – tighten.

￿￿ On the long axle side, slide on a star washer then screw on a nut – tighten.

￿￿ On the long axle side. screw on a nut, a washer, then another nut per the drawing.

￿￿ Slip the bronze bearing onto the long side of the axle – flange first.

￿￿ Insert the long axle side through the hole in the right motor bracket and the coupling on to the drive motor shaft. The bronze bearing should fit in the hole. If not, use a knife to enlarge the hole.

￿￿ Move the nut/washer/nut combination installed earlier so they push against the bronze bearing.

￿￿ Now install the encoder wheel with the nuts and washer as shown in the drawing. The encoder wheel should ride in the slot in the encoder sensor without touching it.

￿￿ Tighten the set screw in the coupling against the motor shaft, tighten the wheel against the coupling, tighten the other nut against the wheel, tighten the two nuts together, and finally, tighten the nuts against the encoder wheel. The encoder wheel should not touch the sensor.

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Contents Assembly and User Guide ARobot Mobile Robot Connectors Introduction About ARobotBasic Stamp II Control Computer What You’ll Need Feature ListTechnical Specifications Precautions Controller Component LocatorGlossary of Terms Glossary of Terms Glossary of Terms Assembly Overview Parts Quantity Description Used ForAbout Screw, nut, and washer sizes Parts Motor Brackets Sanding PaintingPaint Primer Finish CoatWhiskers SummaryHow it Works Whisker Detail Full Scale Whisker Wire Pattern Drive Motor and Brackets Encoder Sensor Front Wheel Assembly Steering Motor and Rear Wheels Steering Motor Mounting Wheel and Axle Steering System Controller Board Battery Pack Don’t install batteries yetSummary Don’t install batteries yet Body Cable Finishing Up Basic Stamp II Installation About the Controller BoardProgramming PC Editor/Downloader Software Cable to your PCUSB Port Programming NotePrograms Steering Adjustment Program STRAIGHT.BS2Test Program TEST.BS2 Wander Program WANDER.BS2About the Controller Board Power On/Off Switch Reset ButtonBatteries Speaker LED indicatorsDrive Motor and Encoder Push Buttons and Jumpers switchesSteering Motor Example !1M11200E7 Coprocessor Command SummaryCoprocessor Communication Rules RC Servo Motor and Steering Motor ControlHexadecimal, Binary, Bytes, Words, etc Body Connector J8 Battery Connector J9Serial Port J12 PinoutDrive Motor Connector J10 RC Servo Motor Connectors J2-J5Powerful Connector J11 Voltage 12 volts Maximum Current 500ma PinoutExpansion Port RC Servo Motor Signals Expansion Connector J1Expansion Port Circuit Examples Digital/Power Output Switch Input ExampleDigital Inputs Sensor Input ExampleBasic Stamp II light sensor example code Analog InputsCommunications Coprocessor Network ExpansionUsing Other Controllers Using ARobot’s controller as a coprocessorCabling between ARobot’s controller and another controller Suggested Reading Component Suppliers Small Parts Sava IndustriesStock Drive Products SuperCircuitsWeb Sites Internet Robot ResourcesNewsgroup NameDescription Internet News GroupsTroubleshooting Arrick Robotics Warranty InformationRobotics.com