Pololu TReX Dual Motor Controller DMC01

2 pc(s)
RBT-00621

$145.00

The TReX Dual-Motor Controller is a versatile, high-power DC motor controller designed to seamlessly blend autonomous and human control of small- and medium-sized robots. The TReX can control two bidirectional and one unidirectional motor via three independent control interfaces: radio...
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The TReX Dual-Motor Controller is a versatile, high-power DC motor controller designed to seamlessly blend autonomous and human control of small- and medium-sized robots. The TReX can control two bidirectional and one unidirectional motor via three independent control interfaces: radio control (RC) servo pulses, analog voltage, and asynchronous serial (RS-232 or TTL).

The TReX uses five input channels to receive the RC or analog control signals. When operating in RC or analog mode, the five channels function as follows:

  • Channel 1: motor 1 speed and direction or, if in mix mode, turn left/right
  • Channel 2: motor 2 speed and direction or, if in mix mode, go forward/reverse
  • Channel 3: auxiliary (unidirectional) motor speed
  • Channel 4: can be used to enable “flipped mode", which allows invertable robots to be controlled as normal when they are inverted
  • Channel 5: determines whether the motors are controlled by the channel inputs or the serial interface; this channel allows you to switch between autonomous and human control at will

The serial interface can switch instantly with one of the other two interfaces, allowing mixed autonomous and remote control. For example, a robot could be configured to run autonomously most of the time, but a human operator could override the autonomous function if the robot gets stuck or into a dangerous situation. If the serial mode is selected as the primary interface, high-resolution measurements of all five channel input signals (be they RC pulses or analog voltages) are made available to the autonomous robot controller, allowing for complex and unlimited mixing of operator control and sensor input. For example, the TReX would be a great motor controller for a remotely controlled balancing robot.

Features

  • RC/Analog control features
    • Battery Elimination Circuit (BEC) jumper lets the TReX optionally power your RC receiver or analog controller
    • mix-mode jumper allows for single-stick motor control of differential-drive robots
    • automatic calibration for your particular RC or analog controller (the TReX can learn the channel ranges)
  • Options accessable through the serial interface
    • all five high-resolution channel input values are available
    • remapped channel input values show what the TReX would do if it were in control
    • optional 7-bit cyclic redundancy checking to ensure command/data validity
    • calibration values can be explicitly read and set
    • each channel can be reversed and parabolically scaled
    • current limit, acceleration, and maximum motor speed settings
    • the bidirectional motors can (individually) be set to coast or variable brake when in the deadband
    • upgradable firmware
  • Safety features
    • “safe-start" requirements prevent accidental motor activation at power-up
    • optional automatic motor shutdown on serial error, timeout, or input channel noise

Specifications:

  • Motor Driver: VNH2SP30
  • Motor channels: 3 (two bidirectional, one unidirectional)
  • Control interface: non-inverted TTL serial (2-way); RS-232 serial (1-way), RC servo pulses, analog voltage
  • Operating voltage: 6V to 16V
  • Continuous output current per channel: 13A
  • Continuous paralledled output current: 25V
  • Current sense: 0.13V/A
  • Maximum PWM frequency: 19.5KHz
  • Logic voltage: 2.7V to 5.5V
  • Reverse voltage protectioncscart_ Yes

Documents

Dimensions: 1.9" x 1.9" x 0.8"

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