Mother Truckers Project

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Mother TruckersProject 2
David Weaver Great start!

• Steve, Daniel, Carly

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Transmitter
Diodes
On/Off Switch
Resistor
Transistor
Crystal
(oscillates _at_ 27.145 MHz
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The Truck Circuit
Capacitors
DC Motor
Chip
DC Motor
Resistor
Transistors
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DC Motors
David Weaver Lenzs law doesnt really explain
the goings on. Explain the actual operation in
greater detail.

• In any electric motor, operation is based on
  simple electromagnetism. A current carrying
  conductor generates a magnetic field.
• Lenzs Law ?B?V?I?B?
• Every DC motor has six basic parts- axle, rotor
  (armature), stator, commutator, field magnets,
  and brushes.

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Servo Motors
David Weaver Im sure you dont mean to
plagiarize, but you have

• A servo is a small device that has an output
  shaft. This shaft can be positioned to specific
  angular position by sending the servo a coded
  signal.
• The servo motor has some control circuits and a
  potentiometer (a variable resistor, or pot) that
  is connected to the output shaft.
• This pot allows the control circuitry to monitor
  the current angle of the servo motor. If the
  shaft is at the correct angle the the motor shuts
  off.

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Stepper Motors
David Weaver You should have some images that
help you explain the physics of how steppers work.

• Stepper motors can be controlled by turning coils
  on and off, they are easy to control using
  digital circuitry.

• Stepping motors can be viewed as electric motors
  without communtators, which are in control of
  flipping the rotors magnetic field. The
  direction of rotation depends on which way the
  current is flowing through the rotor. If the
  motor is driven by a battery and flip the
  polarity of the battery the direction will
  reverse.
• Typically all windings in the motor are part of
  the stator, and rotor is either a permanent
  magnet or a block of magnetic material. All of
  the comutation must be handled externally by the
  motor controller.

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Radio Controller Devices
David Weaver How is SAM radio controlled? You
need to go into MUCH greater detail about
electromagnetic radiation, how RC systems create
and use them, etc. Splain where these waves fit
into the spectrum, the function of the crystals
(at either end), etc.

• Both SAM the robot and the RC truck use Radio
  Wave to control them.
• Radio Waves are essentially electromagnetic waves
  sent from a transmitter to the receiver in the
  truck or SAM.
• The receiver then translates the signal into
  commands for each motor.

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Radio Controlled Devices

• Signals are measured in Megahertz which means
  millions of cycles per second. The RC truck
  operates at 27MHz.

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How does it work?

• The Transmitter is essentially the controller. It
  takes a command, turns it into a pulse wave and
  sends it to the transmitter.
• The receiver is a tool used to receive the signal
  transmitted and decode the pulses into the
  original command. Then it tells the motors what
  to do.

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How does it work?
David Weaver You really need to give credit for
where you got stuff. You should also describe
how the different commands differ. How is the
Forward command different from the Reverse?

• The signal wave is actually pulses. Different
  amounts of pulses are different commands.

A- Pulse Sequince E-Burst Sequince B- 27.9 MHz
Signal -Each 700 Micro Sec Long C-Transmitted
Signal -With 700 Micro Sec Spacing D- 4 Syncro
Bursts F-Signal Repeats -Each 2.1ms long -With
700 Micro Sec Spacing
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The difference
David Weaver Sam is remote and the RC truck is
RC.

• The difference between radio control and remote
  is that remote uses a wire to send the signals
  through and radio is wireless.

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SIGNALS Program 4 Function
27 MHz RC Vehicle
Use this data to determine that
movement/direction of your RC Truck
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Entering SIGNALS into Your Graphing Calculator
S Signal (see previous slide to determine
Signal)
T Time ( of seconds for which the signal will
be transmitted)
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SAM Robot
David Weaver Please explain each of the 4
systems in greater detail and compare and
contrast them in the body of the presentation.
Show the innards of SAM and identify the various
components. Explain what the LabPro is and does.
Why not explain how ultrasonic motions detectors
work? (thats the blue thingee)

• In The Right Place Activity
• 
  (see Appendix for Questionnaire)
• Purpose to decide which system would be the most
  efficient prototype for a mobile microrobot, used
  for medical procedures
• Basic Manual System vs.
• Manual Velocity Control-System vs.
• Basic Automatic System vs.
• Automatic Velocity-Control System
• (most efficient)

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Appendix
SAM Part 1
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SAM Part 2
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SAM Part 3
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Sam Part 4
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SAM Part 5
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SAM Part 5 cont.