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Electrical Parts & Tools

Electrical Parts & Tools. By: Christine Chen Team 115. What is Crimping?. Crimping a wire simply connects a wire to another or something else like a speed controller to pass on electrical current. Crimping Tool. Crimps. male. female.

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Electrical Parts & Tools

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  1. Electrical Parts & Tools By: Christine Chen Team 115

  2. What is Crimping? • Crimping a wire simply connects a wire to another or something else like a speed controller to pass on electrical current Crimping Tool

  3. Crimps male female To connect 2 wires, crimp a female crimp on the end of one wire and the male crimp on the end of the other wire.

  4. Solder & Iron • Soldering is joining metals by melting a metal with a low melting point (solder) and join metals (wires) • Creates an electrical and mechanical connection • Soldering Iron melts the solder Solder Soldering Iron

  5. Crimping Faster/easier Better for use with larger wire  takes too long too heat wire up to melt solder Quick fix Soldering More reliable when done properly More rigid Stronger than a crimp Preferable Better connection Lower resistance Easier to determine whether connection is good or bad Crimping v. Soldering

  6. Robot Controller (RC) PWM output (connects to speed controllers) • Holds the code for the drivetrain, arm / manipulator, and autonomous • Outputs speed that is received via radio/tether to speed controllers to motors • “Brain” of the robot • Tether port connects RC to OI directly • Program port connects the RC to laptop/computer to download new code Programport Tether port

  7. Operator Interface (OI) • Transmit data (i.e. speed from joysticks) to RC via radio/tether • Attaches to external switches (i.e. kill switch, push button) • Ports connect to joysticks and switches • Competition port connects to switches that decide the mode (disabled & autonomous) Operator Interface reset Robot controller reset

  8. Analog Goes from 0 to 254 Values generally used for speed for motors 0 full speed backward 254 full speed forward 127 neutral Also used for potentiometers Digital Values are 0 and 1 Used for limit switches or push buttons 0 for closed and 1 for open or vice versa Depends on how you wire the switch and decide to program Analog and Digital

  9. Speed Controller • Regulates speed for the motors • Transmits speed to motor from RC

  10. Spikes • Connects directly to the RC rather than to the Breaker Panel • Used to control the pneumatic cylinders • Uses a 12V Battery

  11. Tether/Programming Cable • Programming cable connects RC to laptop for code download • Tether connects RC (Robot Controller) to IO (Operator Interface)rather than use of radio

  12. Joystick • Used to drive the robot and move the arm/manipulator • Transmits speed from 0 to 254 with 127 being neutral • Therefore 0 is backwards and 254 forwards full speed • Transmits speed to OI (Operator Interface)

  13. Limit Switches • Used as a electrical tool in determining when to stop and start the motion of an arm/manipulator • When stop a heavy manipulator like an elevator, a mechanical stop is needed as well to avoid cracking the plastic covering on the switch • Transmit data digitally (0 & 1 for open & closed or vice versa)

  14. Potentiometers • The top of the potentiometer moves and moves also from the values 0 to 254 • Sends feedback telling the program how far the potentiometer has been turn

  15. Electrical Tape • Prevents the electrical current from hurting people on battery terminals or open wire • Primarily used to insulate bare wires or ends

  16. PWM • Stands for pulse width modulator • Used to transmit data to speed controllers • Red for power • Black for ground • White/Yellow for service PWM Crimps

  17. Breaker Panel • Uses automatic reset fuses to control amount of voltage a motor is drawing out from the main battery • 20/30/40 amp fuses for different types of motors • When the fuse pops up, it means that the motor is drawing too much current Fuse

  18. Backup Battery • Takes over for the main battery for a few seconds if the average voltage coming out of the main battery dips below a certain point (generally around 11 volts)

  19. Servos • Rotates from 0 to 254 • Once given position, stays there and cannot be moved unless “told” by the code • A very small motor

  20. Main Battery • 12 volt battery • Main battery that connects to breaker panel and circuit breaker

  21. Main Circuit Breaker • Connected to the red wire (power) of the battery • When turned off, all power is cut off and robot turns off • Easy way to turn the robot off • Needs to be place in an accessible but not too accessible place so that it can be pushed but not during competition accidentally • Connects (red) to the breaker panel • Very hard to trip this breaker

  22. Zip ties • Used to keep wiring neat and out of the way from moving parts to avoid the wires from getting cut

  23. Label Maker • Labeling wire makes it easy to identify where it’s from / going to (ex. from RC to switch)

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