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Jackal User Manual

Introduction

Jackal is a rugged, lightweight, fast and easy-to-use unmanned ground robot for rapid prototyping and research applications. Jackal includes a computer, as well as basic IMU and GPS. Standard perception modules are available, including URDF, simulator integration, and demonstration applications.

danger

Mobile robots are inherently hazardous. It is the responsibility of the deployer to ensure that all personnel that may come into contact with the system are trained properly. It is also the responsibility of the deployer to understand the hazards presented and to ensure sufficient safeguards or other mitigations are in place. Refer to the Safety section of this manual for further details.

Shipment Contents

Your Jackal shipment contains the following:

  • Clearpath Robotics Jackal
  • 270 Wh lithium battery
  • 110 VAC - 220 VAC battery charger
  • Sony PS4 Bluetooth controller

If you purchased standard payload modules or custom integration services with Jackal, then additional equipment will be included per your specific configuration, plus further documentation as required.

Hardware Overview

System Architecture

Jackal is built around a computer running Ubuntu (Intel-based computer or Jetson developer kit), paired with a 32-bit microcontroller MCU. The MCU handles IO, power supply monitoring and motor control, as well as supplying data from the integrated IMU and GPS receiver. The communication channel between the MCU and PC is a Full Speed USB connection, with the MCU operating as a standard serial CDC device.

The communication protocol used is rosserial. An instance of the rosserial_server serial node is embedded in the jackal_base node, where it is connected to Jackal's kinematic controller.

An internal magnetometer is available, but not recommended for use due to its location in the vehicle chassis.

Exterior Features

The Jackal exterior is shown below and includes:

  • 80 mm mounting pattern on the lid
  • 190 mm diameter wheels
  • Human machine interface panel (HMI)
  • Lid latches

Human-Machine Interface (HMI) Details

The human-machine-interface (HMI) panel is shown below and includes from left:

IconDescription
Motion Stop button: LED is solid green when Jackal is able to drive and flashing green when the Jackal's motors are disengaged; pressing button toggles the motors between engaged and disengaged mode (further details in Motion Stop Buttons)
Comms indictor: LED is solid green when communication between the MCU and computer has been established and LED is off otherwise
Wi-Fi indicator: LED is solid green when Wi-Fi is connected and LED is off otherwise
Battery indicator: LED is solid green when the battery level is ok, solid yellow when the battery level is getting low (should be charged soon), and solid red when the battery level is critical (should be charged immediately)
System Power button: LED is solid blue when the system is powered on and running and the LED is flashing blue during the shutdown process; when the system is powered off, pressing the power button begins the power on process; when the system is powered on, a quick press of the power button begins a graceful shutdown and a prolonged press of the power button triggers and immediate power off of the system
HMI Panel

Payloads

Additional payloads such IMUs, lidars, cameras, GPS, manipulators and many more can be integrated with Jackal, either as part of your Jackal purchase or installed after receiving your Jackal. You can find a list of supported packages and related documentation for payloads in this documention portal, under the Computers, Sensors, Manipulators, and Accessories sections. In addition, refer to Jackal Integration for details on how to integrate your own payload or how to integrate a payload kit from Clearpath Robotics. Each payload kit that ships from Clearpath Robotics comes with a custom mounting bracket and cabling for easy attachment to Jackal.

Interior Features

To access Jackal's interior, actuate the latches under the front end of the lid, on the opposite end from the HMI. When you lift the lid, you will see Jackal's onboard lithium battery, and its two connectors. The large Anderson Power Pole connector is to supply power to Jackal and must be connected for Jackal to operate. The smaller white Molex connector allows the battery to be charged inside Jackal while Jackal is powered off. It is recommended to connect both. The interior components of Jackal are labeled below.

Battery area inside Jackal

Further, you may undo the thumbscrews which hold Jackal's computer tray to the lid. The tray lowers, revealing Jackal's onboard computer, user power supplies, and internal user hardware mounting area. The figures below illustrate the components of the tray and user power supplies. Note that the fused user power is available as four-pin Molex connectors, or a plug-in screw terminal block. For more information on integrating payloads electrically, see Jackal Integration.

Computer and user tray
User power supply

Orientation References

The reference frame used by all Clearpath Robotics ground robots is based on ISO 8855.

When commanded with a positive translational velocity (forward), wheels travel in the positive X-direction. The direction of the axes differs from those used for roll, pitch, and yaw in aircraft, and care should be taken to ensure that data is interpreted correctly.

System Specifications

SpecificationMeasurement
Dimension, Length508 mm
Dimension, Width430 mm
Dimension, Height250 mm
Ground Clearance65 mm
Maximum Payload20 kg
Speed, Maximum2.0 m/s
Battery ChemistryLithium, 270 Wh
Operating Time8 hours (basic usage), 2 hours (heavy usage)
Charge Time4 hours
User Power16 A @ VBAT (25.6 V nominal), 7 A @ 12 V, 5 A @ 5 V
CommunicationEthernet, USB 3.0
Internal SensingBattery Status, Wheel Odometry, Motor Currents, Onboard IMU, Onboard GPS
Operating Temperature-20 to 45 °C
Operating EnvironmentIndoor or Outdoor (designed for IP62)

Getting Started

You are ready to go! This section details how to get Jackal into action. To begin, place Jackal "up on blocks" as described in the Safety section, making sure that the wheels are clear of the ground.

For most Jackal setups, there will be an Onboard Computer which is directly connected to the Jackal and a Remote Computer which is used to control Jackal and gather data. These two computers must be set up to communicate with each other.

Onboard Computer Setup

If you purchased an Onboard Computer from Clearpath Robotics with Jackal, it is already installed, connected, and powered. If not, or to set up your own Onboard Computer, see the Jackal Tutorials.

Note that the Onboard Computer must be connected to the USB port on the Jackal MCU, which is accessible inside the Jackal.

Powering Up

If you've just unpacked Jackal from its packaging, you may need to open it up and connect the battery.

Press the power button on Jackal's HMI panel. The LEDs should show a test pattern, after which you will wait about 30 seconds for the internal computer to finish booting up. Once it has finished booting, the Comms indicator should turn green. This indicates that ROS is up on the computer and has established communications with the Jackal base.

Network Configuration

To get Jackal connected to your local Wi-Fi network, you must first access the Onboard Computer using a wired connection to the robot. Open the chassis, lower the computer tray, and connect to the network port labeled STATIC with a standard ethernet cable. See the Jackal Tutorials for details on completing the Wi-Fi setup.

Connecting and Using the Controller

To use your controller, it must be paired with your Jackal and powered on. If your purchased the Onboard Computer from Clearpath Robotics, your controller is already paired with your Jackal. If your controller has become unpaired or if you wish to pair a new controller, following the instructions in the Jackal Tutorials.

To teleoperate Jackal, first clear the motion-stop. Then, power on the controller by pressing the PS button on the controller. Once the blue LED on the top of the controller goes solid, you are paired and ready to drive. Hold the L1 trigger button (deadman switch) and push the left thumbstick forward to drive the Jackal. For full speed mode, hold the R1 trigger. See the figure below for the Sony PS4 controls layout. If you are not seeing any action, refer to Support to get in touch with support.

PS4 Controls Layout

Using ROS

Robot Operating System (ROS) is an extensible framework for controlling and working with robotic systems. Clearpath Robotics recommends using ROS with your robot. If this is your first time using ROS, it is strongly recommended to run through our series of ROS 101 tutorials to learn the basics of ROS.

Battery Charging

When finished with the Jackal, press and release the power button to power it off.

Jackal's lithium battery may be charged internal to the chassis: simply plug in the charger to the charge port located under the rear fender. Charging will occur when Jackal is powered down.

Alternatively, if you have multiple batteries, you can easily lift the lid and remove the battery for external charging. When charging externally, remove the pigtail which adapts the charger to the platform's weather sealed charge port.

The battery is manufactured for Clearpath Robotics by AllCell Technologies. The pack includes integrated protections against fault due to overcurrent, overdischarge, and short circuit. The pack is rugged and designed for the demanding environments into which Jackal may be deployed.

However, please take note of the following:

  • The pack must not be stored or operated above +60 °C or below -19 °C.
  • The pack must not be punctured or disassembled.
  • The pack should be dropped off or delivered to your local hazardous waste authority for disposal.
  • When traveling with Jackal, consult your airline's restrictions regarding lithium batteries. If possible, bring the pack in your carry on luggage, where it will be subject to normal cabin temperatures and pressures.

Please contact Clearpath Robotics for additional information about Jackal's battery or for information about purchasing additional packs.


Safety Considerations

Clearpath Robotics is committed to high standards of safety. Jackal contains several features to protect the safety of users and the integrity of the robot.

caution

Jackal is a fast moving robotic platform. Please read the following notices carefully.

General Warnings

Jackal is a rugged and high-performance robot. For the safety of yourself and others, always conduct initial experiments and software development with the robot raised off the ground. Place a wooden crate, a set of sawhorses, a sturdy storage tub, or any other solid flat structure having a height greater than 100 mm under Jackal to keep the wheels clear of the ground ("up on blocks").

When starting out, favour slower wheel speeds. Jackal's control loops can accurately maintain velocities as low as 0.1 m/s. Operating at such speeds will give you more time to react if things don't go quite as you expect.

Motion Stop Buttons

The Motion Stop button is located on the HMI Panel at the back of Jackal. To engage Stop Mode, press the Motion Stop button once; you should see that the green LED by the Motion Stop button is flashing and that all four corner LEDs are flashing red. To disengage Stop Mode, press the Motion Stop button again; all LEDs should return to their original values.

When in Stop Mode, the Jackal will not drive. The commands received while in Stop Mode are not buffered; Jackal will always act on the latest commands received. This means that if the commands are stopped before the Motion Stop button is pressed to disengage Stop Mode, the Jackal will not move. If the commands are continued, Jackal will move at the speed commanded once the Motion Stop button is pressed to disengage Stop Mode.

Ensure that the Motion Stop button is accessible at all times. Avoid mounting payloads that extend over the rear of Jackal and would block access to the Motion Stop button.

Electrical System

Jackal is powered by batteries capable of delivering high outputs for short durations. This gives Jackal's motors their great performance; however, it is also enough power to cause severe bodily harm. Always use caution when operating Jackal to avoid personal injury or property damage. To ensure safety, please observe the following precautions:

  • Do not tamper with the plug attached to the battery.
  • Do not tamper with the fuses, except to check and change the fuses.
  • Always replace fuses with the same type and rating to ensure continued protection against risk of fires.
  • Consult Clearpath Robotics support if you need to service the batteries.
  • Charge the battery only with the charger provided by Clearpath Robotics.
  • Please dispose of the batteries properly or return them to Clearpath Robotics to do so.

Lifting and Transport

For the safety of users and to maximize the lifetime of Jackal, please observe the following when manually transporting the robot:

  • Ensure that Jackal's Stop Mode is engaged when transporting short distances and powered off when transporting longer distances.
  • Do not push the robot at more than 0.5 m/s (1.6 ft/s) or damage to the motor controls may occur.

Performance Considerations

Included in Jackal are native software checks and limits to protect the robot. However, it is recommended to monitor the system's status during usage with the /status and /diagnostics topics. These topics provide useful information regarding voltages, currents, temperatures and general health of the system.

Clearpath Robotics recommends the following procedures be followed to reduce the likelihood of harm.

  • Maintain a safe distance of at least 10 m from the robot whenever possible.
  • Never assume that the robot can be reliably stopped on command.
  • Assert a stop using the remote stop device (if present) before approaching the robot.
  • Never place the remote stop device (if present) on or inside the robot.
  • Always be vigilant around the robot, even when a stop is asserted.
  • Perform no maintenance or troubleshooting on the robot without training and familiarisation.
  • Follow electrical safety best practices when working with electrical systems and components.
  • Disconnect battery using main disconnect of the robot before working inside robot.
  • Wear personal protective equipment including high-visibility clothing, head and eye protection while operating, observing or working on the robot.
  • Never climb on or ride the robot.
  • Never lie on the ground under or near the robot.
  • Avoid operating the robot on slopes and grades.
  • Never stand downhill of the robot.
  • Operate the robot at the lowest speed possible.
  • Never attempt to defeat a safety function for any reason.
  • Chock the robot's wheels when the robot will be stationary for more than a few seconds.
  • Never work on the robot while it is on a slope.
  • Replace fuses only with identical product from specified manufacturer.
  • Discontinue use and contact Clearpath Robotics support at the first sign of strange robot behaviour.
  • Keep tools and loose parts away from electrical components and out of the robot's bays.
  • Check the functionality of stop systems on a regular basis, including before and after each use.

Support

Clearpath is committed to your success. Please get in touch with us and we will do our best to get you rolling again quickly: support@clearpathrobotics.com.

To get in touch with a salesperson regarding Clearpath Robotics products, please email sales@clearpathrobotics.com.

If you have an issue that is specifically about ROS and is something which may be of interest to the broader community, consider asking it on https://answers.ros.org. If you do not get a satisfactory response, please ping us and include a link to your question as posted there. If appropriate, we will answer in the ROS Answers context for the benefit of the community.