RoboClaw 2x45A Motor Controller

The RoboClaw 2x45A is an intelligent motor controller designed to control two brushed DC motors at 45 Amps continuous with up to 60 Amps peak per channel. It can be controlled from USB, RC radio, PWM, TTL serial, analog and microcontrollers such as an Arduino or Raspberry Pi.

Not currently available

Our Code: SKU-003919

Supplier Link: [Pololu MPN:3287]

Description

The RoboClaw 2x45A is an intelligent motor controller designed to control two brushed DC motors at 45 Amps continuous with up to 60 Amps peak per channel. It can be controlled from USB, RC radio, PWM, TTL serial, analog and microcontrollers such as an Arduino or Raspberry Pi.

Key Features:

  • 45 Amps Continuous Per Channel
  • 60 Amps Peak Per Channel
  • Dual Encoders Supported
  • Position Control
  • Autotuning PID
  • Multimode Control Interface
  • USB, Serial, R/C, Analog Inputs
  • Limit, Home and E-Stops
  • Up to 34VDC Operation

RoboClaw automatically supports 3.3V or 5V logic levels, travel limit switches, home switches, emergency stop switches, power supplies, braking systems and contactors. Power supplies can be used by enabling the built in voltage clamping control feature. A built-in switching mode BEC supplies 5VDC at up to 3 Amps for powering user devices.

Brushed DC motors can be controlled in open or closed loop using position or velocity control modes. RoboClaw features several built-in commands for controlling acceleration, deceleration, distance, speed, current sense, voltage limits and more. RC and analog control modes also include several user defined settings such as acceleration and decelerate speeds.

Dual quadrature encoders with up to 19.6 million pulses per second are supported and can be auto tuned using Motion Studio which is a free downloadable application. In addition, a wide range of sensor inputs including potentiometers and absolute encoders are supported. RoboClaw's closed loop functionality creates absolute control over speed, velocity and direction regardless of load changes.

RoboClaw incorporates several protection features including temperature, current, over voltage and under voltage limits. The protection features are self monitoring and protect RoboClaw from damage in any operating condition. Several user definable settings such as maximum current limit, maximum and minimum battery voltages are provided for more refined control.

RoboClaw's regenerative capabilities will charge a supply battery during slow down or breaking. It's advance circuitry can change direction during full throttle without damage! RoboClaw also incorporates a LiPo cutoff mode to prevent battery damage.


Description

Overview

The RoboClaw from Ion Motion Control (formerly Orion Robotics) is an efficient, versatile, dual-channel synchronous regenerative motor controller. It can supply two brushed DC motors with 7.5 A, 15 A, 30 A, 45 A, or 60 A continuous (depending on the model) at voltages from 6 V to 34 V, and it allows for peak currents up to twice the maximum continuous rating.

The RoboClaw features dual quadrature decoding capability. A built-in PID routine can be used for closed-loop speed control, maintaining motor speeds even if the load varies, or the encoder counts and speeds can be read directly from the RoboClaw for use with an external control system. Analogue feedback is also supported for closed-loop position control.

The RoboClaw has a USB interface that acts as a virtual serial (COM) port, allowing it to be controlled directly from a computer. Several other interface modes are supported by the RoboClaw as well: it can be controlled via TTL serial for use with an embedded system, RC hobby servo pulses for use as an RC-controlled electronic speed control (ESC), or analogue voltages for use with potentiometers or analogue joysticks.

The RoboClaw 2x7A (V5 and V5B) and V5 and V5D versions of the 2x15A, 2x30A, 2x45A, and 2x60A have USB Micro-B connectors; older USB RoboClaws had a USB Mini-B connector.

Details for item #3287

This version, the Roboclaw 2x45A, has pin headers for control I/O connections. It is also available with screw terminal I/O connections (ST. 2x45A).

Key Features

  • Simple bidirectional control of two brushed DC motors
  • 6 V to 34 V operating supply range
  • 7.5 A to 60 A maximum continuous current output, depending on controller model
  • Automatic current limiting reduces duty cycle when motor current is between 1× and 2× the controller’s rated current
  • Four communication or control options:
    1. USB serial interface (virtual COM port)
    2. Logic-level (TTL) serial interface for direct connection to microcontrollers or other embedded controllers
    3. Hobby radio control (RC) pulse width interface for direct connection to an RC receiver or RC servo controller
    4. 0 V to 2 V (5 V tolerant) analogue voltage interface for direct connection to potentiometers and analogue joysticks
  • Dual feedback inputs for PID closed-loop control:
    • Speed or position control with quadrature encoders, up to 19.6 million encoder pulses per second
    • Position control with analogue encoders or potentiometers
    • (Open-loop control with no feedback also available)
  • Screw terminals for quick connect/disconnect
  • Configurable via pushbutton interface
  • Regenerative braking
  • Tolerates high-speed direction changes
  • Jumper-selectable 5 V BEC
  • Battery monitoring and under-voltage cutoff protects batteries from over-discharging

RoboClaw Comparison Table


2x7A

2x15A

2x30A

2x45A
ST. 2x45A

2x60A
Motor channels: 2
Operating voltage: 6 V to 34 V
Continuous output current: 7.5 A 15 A 30 A 45 A 60 A
Peak output current: 15 A 30 A 60 A 60 A 120 A
5V BEC(1) max current: 150 mA (V5) or 1.2 A (V5B) 3 A
Width: 1.7″ (4.2 cm) 2.1″ (5.2 cm) 3.4″ (8.6 cm)
Length: 1.9″ (4.8 cm) 2.9″ (7.4 cm) 3.9″ (10 cm)
Weight: 18 g 60 g 60 g (2x45A)
63 g (ST. 2x45A)
205 g

1 Battery Eliminator Circuit

Sample Code

Ion Motion Control has written an Arduino library for the RoboClaw that makes it easy to interface these motor controllers with an Arduino. The library comes with several example sketches that demonstrate different methods of controlling the RoboClaw.

Note: Ion Motion Control was formerly Orion Robotics, which was previously Basic Micro. Ion Motion Control uses the following product names and number for the RoboClaw controllers:

    “RoboClaw 2x7A Motor Controller”, Item Id: ION404 (replaces “RoboClaw 2x5A”, Item Id: ION403)
    “RoboClaw 2x15A Motor Controller”, Item Id: ION412
    “RoboClaw 2x30A Motor Controller”, Item Id: ION413
    “RoboClaw 2x45A Motor Controller”, Item Id: ION418
    “RoboClaw ST. 2x45A Motor Controller”, Item Id: ION419
    “RoboClaw 2x60A Motor Controller”, Item Id: ION414


Specifications

Dimensions

Size: 2.1″ × 2.9″ × 0.9″
Weight: 60 g

General specifications

Motor channels: 2
Control interface: USB; non-inverted TTL serial (2-way);
RC servo pulses; analogue voltage1
Minimum operating voltage: 6 V
Maximum operating voltage: 34 V
Continuous output current per channel: 45 A
Peak output current per channel: 60 A

Notes:

1
Available baud rates are 2400, 9600, 19,200, and 38,400 bps.

Resources

Recommended links

RoboClaw motor controller user manual
User manual for the RoboClaw brushed DC motor controllers.
RoboClaw Motor Controller resources
Go here to find links to all of the downloadable RoboClaw resources, including datasheets, drivers, source code libraries, and CAD drawings.