1 | General

1.1 | Important Notices
Important: Please read this before using any of our software products.
T3RRA Operators Manual
© 2026 T3RRA
Notice of Rights
No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual, or otherwise, without the prior written permission of T3RRA Pty Ltd.
Trademark Notice
T3RRA Cutta™, T3RRA Plane™, T3RRA Ditch™, T3RRA Survey™, T3RRA Apply™, COMMAND™ and Level COMMAND™ software images and their logos are the exclusive trademarks of T3RRA. All other trademarks, service marks, software images and logos used in this documentation belong to their respective owners.
Notice of Liability
The information in this document is distributed on an ‘as is’ basis, without warranty. While every precaution has been taken in the preparation of this manual, neither the authors nor T3RRA shall have any liability to any person or entity with respect to any loss or damage caused or alleged to be caused directly or indirectly by the instructions contained in this book or by the machine-control systems and associated equipment products described in it.
Disclaimer
We make a sincere effort to ensure the accuracy of the material described herein; however, T3RRA makes no warranty, expressed or implied, with respect to the quality, correctness, reliability, accuracy, or freedom from error of this document or the products it describes. Data used in examples and sample data files are intended to be fictional. Any resemblance to real persons or companies is entirely coincidental. While reasonable effort has been made to ensure the accuracy of this publication, T3RRA assumes no responsibility for errors or omissions, or for damages resulting from use of the information contained within this manual. Information contained within this manual was current at the time of publication.

1.2 | About Our Software
This manual explains how to operate our software for in-cab landforming design and implementation to improve field terrain. Changes to field surface contours most often support efficient irrigation or better drainage. They nearly always also improve trafficability and create additional management opportunities.
T3RRA Cutta V2 and V3 are designed to operate with different machine control systems. T3RRA Cutta V2 operates with John Deere iGrade™, while T3RRA Cutta V3 operates with T3RRA LevelCOMMAND. Each version is specifically configured for its respective control system and is not interchangeable.
Software packages
We offer several packages to meet different market requirements:
T3RRA Cutta 3 is our most fully featured application. It includes all our functionality for full field landforming, ditch creation and levee delineation.
T3RRA Ditch 3 includes all the ditch and levee creation capabilities of T3RRA Cutta, but is not appropriate for full field earthworks.
T3RRA Plane 3 is for Best-fit full field design projects.
T3RRA Apply 3 is for surveying and applying dirt moving projects without the design step.
T3RRA Survey 3 is solely for gathering elevation data.
T3RRA Design V2 / Plus and Cutta Desktop are related desktop design products: a traditional “keyboard and mouse” application for office use. Their advanced nature requires separate manuals; refer to that specific manual for more information.
Terminology in this manual
T3RRA Cutta 3, T3RRA Ditch 3, T3RRA Plane 3, T3RRA Apply 3 and T3RRA Survey 3 use the same basic building blocks and share many user interface screens and functions. This manual uses “T3RRA software” for topics common to all five applications. Information specific to one or two applications is identified by the actual software name.

1.3 | Intended Use
Supported equipment and tasks
Use T3RRA In-cab Software on supported construction, landforming and earthmoving machinery fitted with compatible hardware, GNSS receivers, hydraulic interfaces and machine sensors.
During earthmoving and landforming, the system assists operators with terrain guidance, grading, surface control and automatic implement positioning.
Performance and operator responsibilities
Performance depends on all of the following:
Correct installation
Machine calibration
GNSS signal quality
Terrain conditions
Hydraulic performance
Operator supervision
T3RRA In-cab Software provides operator assistance and terrain control; it does not transfer responsibility from the operator. At all times, the operator is responsible for safe machine operation, terrain awareness and final work quality.
Only personnel familiar with machine-control systems and safe equipment operating procedures may operate the system.

1.4 | Choosing an In-cab Tablet PC
Compatible hardware and display
T3RRA in-cab software runs on any 64-bit Windows 11 PC, whether a desktop computer, laptop or tablet PC. A keyboard and mouse can be used, but the software is designed primarily for a touchscreen interface.
For most installations, a Windows tablet PC offers the best balance of portability, usability and mounting flexibility in the machine cab. For the best operating experience, use landscape orientation and a screen size of 10 inches or larger, as recommended.
Consumer and rugged tablets
Windows tablets vary in performance, durability and price. Choose according to your operating environment and business requirements. The two broad categories are compared below.
T3RRA supplies ruggedised RuggON tablets designed for demanding in-cab environments. Compared with consumer-grade devices, their resistance to vibration, dust, moisture and temperature extremes significantly reduces hardware failures, downtime and warranty claims.
Consumer tablets can be used if they meet the minimum hardware requirements and remain in good working condition. Many customers have used devices such as the Microsoft Surface Pro successfully in cab, however these are not recommended for extended in cab use. 
Consumer devices are generally intended for office or home use, not continuous operation in harsh agricultural or construction environments. Vibration, dust, weather and temperature extremes can reduce their reliability and service life.
Consider the cost of unexpected downtime as well as the purchase price. Where machine availability is critical, a ruggedised tablet—or a readily available spare tablet—is strongly recommended.
Note - If a consumer tablet is chosen, such as a Windows Surface Pro, Qualcomm Snapdragon processors are NOT supported. 
Reliable operation and maintenance
Modern tablet PCs can run many applications at once. For reliable machine-control performance, avoid installing unnecessary software or running resource-intensive applications while operating T3RRA software. Excessive processor, memory or storage usage may reduce system responsiveness.
Maintain your tablet regularly. During planned maintenance periods, install Windows updates, T3RRA software updates and any recommended driver or firmware updates. Keeping the operating system and software current helps maximise reliability and performance. 

1.5 | Consider the System as a Whole
Accurate machine control relies on the entire landforming system, not on T3RRA software alone. T3RRA software combines terrain design, guidance and implementation with the machine-control capabilities of COMMAND hardware. To achieve the expected accuracy, the mechanical, hydraulic, electrical, GNSS and software components must work together reliably.
T3RRA software performance depends on the condition, configuration and calibration of the surrounding equipment. Software alone cannot compensate for poor machine maintenance, inaccurate GNSS positioning or incorrect COMMAND configuration.
Before beginning work
Verify each of the following before beginning work:
The machine is in good mechanical, hydraulic and electrical condition.
The implement is correctly installed and in good working order.
The RTK GNSS receiver, corrections source and, where applicable, base station are configured for reliable positioning accuracy.
COMMAND Hardware is correctly configured and calibrated.
The tablet PC is up to date, has sufficient available storage and is free from unnecessary software that may reduce system performance.
T3RRA software is correctly installed, configured and updated to the latest recommended version.
Operator responsibility
Stay alert when using T3RRA software. T3RRA software and COMMAND Hardware assist the operator to improve productivity and grading accuracy; they do not replace the operator’s judgement, awareness or responsibility. Continuously monitor machine behaviour, positioning accuracy and work quality during every operation, and be prepared to intervene whenever required. Failure to do so may reduce accuracy, produce unsatisfactory work or create unsafe operating conditions.

1.6 | System Startup
Starting T3RRA Software
Most installations are configured to start T3RRA software automatically when the tablet PC boots.
If the software does not start automatically and you want to enable this functionality, follow the configuration instructions in the accompanying troubleshooting guide.
If T3RRA software has not started automatically after Windows has finished loading, launch it manually: double-click the appropriate desktop shortcut.
Desktop shortcut illustration for launching T3RRA software.
After the software starts, the T3RRA home screen is displayed.

1.7 | Installing T3RRA Software
T3RRA software is typically installed and configured by your authorised T3RRA dealer as part of system commissioning.
Before installing the software, ensure the tablet PC has a reliable internet connection and is fully updated through Windows Update. Keeping Windows current helps ensure compatibility with the latest T3RRA software releases.
System Requirements
Component
Minimum
Recommended
Operating System
Windows 10 (64-bit)
Windows 11 (64-bit)
Processor
64-bit dual-core processor
Intel® Core™ i5, AMD Ryzen™ 5, or better
Memory
8 GB RAM
16 GB RAM
Storage
256 GB available storage
512 GB SSD or greater
Graphics
Integrated graphics
Integrated or discrete graphics
Communications
USB port
Dedicated RS-232 serial port or high-quality USB-to-Serial adapter
Display
Touchscreen
High-brightness touchscreen suitable for outdoor use
Network
Internet connection for installation and updates
Reliable Wi-Fi connection for regular updates
Recommended Hardware 
T3RRA recommends using a ruggedised Windows tablet PC designed for in-cab operation. Rugged tablets provide improved resistance to vibration, dust, moisture and temperature extremes, resulting in greater reliability and reduced downtime in demanding field environments.
Preparing a Tablet for In-Cab Operation
For the best in-cab experience, we recommend the following Windows settings:
Set Power & Sleep to Never to prevent the tablet from entering sleep mode during operation.
Disable Connect automatically for saved Wi-Fi networks that are not regularly used in the field.
Set the display brightness to an appropriate level for outdoor visibility.
Enable Automatically hide the taskbar in both desktop and tablet modes to maximise available screen space.
Many of these settings can be configured automatically during installation using the Tablet Optimisation page of the T3RRA installer.
Software Updates
After installation, ensure the latest version of T3RRA software is installed before beginning work.
To check for updates:
Open Settings.
Select the Application tab.
Click Download Updates.
We recommend regularly connecting the tablet to the internet—either at home or in the office—to allow Windows and T3RRA software updates to download and install. Performing updates and verifying system operation before the start of each earthmoving season is considered best practice.
Antivirus Software
Some antivirus software may prevent T3RRA software from installing or operating correctly.
If antivirus software is installed, add the T3RRA installation folder to the antivirus exclusion list. Refer to the troubleshooting section if installation issues are encountered.
Starting T3RRA with Windows
T3RRA software can be configured to start automatically whenever Windows starts.
To enable or disable this feature:
Open Settings.
Select the Application tab.
Open the Setup section.
Enable or disable Start T3RRA when computer starts.

1.8 | Updating T3RRA Software
T3RRA releases regular software updates to improve reliability, add features and enhance compatibility with supported hardware. Keeping the software up to date provides access to the latest improvements and bug fixes.
Checking for updates
At startup, T3RRA software checks for a newer version only when the tablet has an active internet connection.
When a check is performed, a brief notification in the lower-left corner of the main window reports one of two results:
The software is already up to date.
A newer software version is available for download.
Installing an update
To check for and install updates manually:
Open Settings.
Select the Application tab.
Click Download Updates.
If an update is available, the download starts immediately.
Settings: Application tab with Download Updates.
A progress window shows the download status. When the download finishes, you are prompted to close and restart T3RRA software to complete installation.
Important: Save any work in progress before restarting the software. A reliable internet connection is recommended for downloading updates.
When should you update?
As a general rule, avoid updating software while actively working in the field.
Recommended times to install updates are:
Before an earthmoving season starts.
Between jobs.
When your T3RRA dealer or support representative advises it.
When an update addresses a problem you have experienced or adds functionality you require.
If the current version operates reliably and your application does not require an update, there is generally no need to update immediately.
Reverting an update
Previous software versions can be restored if an update causes unexpected issues.
Perform a software rollback only under guidance from T3RRA or your authorised dealer. If you need assistance, contact T3RRA Technical Support before attempting to revert to an earlier version.

1.9 | Glossary
As-Applied: The field's current state as work progresses, also called As-Built. As earthworks are completed, the As-Applied surface typically changes from matching the original surface to matching the design surface.
Backslope (Batter): The sloping sides that connect the surrounding ground surface to the invert of a drain or channel.
Baud Rate: Serial-link data transmission speed, measured in bits per second (bps). Successful communication requires both devices to use the same baud rate.
Benchmark: A surveyed location whose known position and elevation provide a reference for calibration and verification. Also called a Control Point.
Bi-directional Error: A consistent vertical error that reverses when travel direction reverses. Adjusting system look-ahead time can often correct it.
Blade Shift: Vertical or lateral adjustment of an implement blade, made manually by the operator or automatically by the machine-control system.
Borrow Pit: An excavation left by removing material for use elsewhere in a project.
Bulking: Performing the largest cuts and fills before final grading, with productivity taking priority over final accuracy.
Burning: Embedding a design element in an existing surface.
Button Press: Selecting an on-screen control with the touchscreen; also called tapping.
Com Port (Serial Port): A hardware interface for exchanging serial data between devices. A COM port can be a physical connector or a virtual port created by a USB-to-Serial adapter or internal hardware.
Control Surface: The reference surface from which the machine-control system determines the required implement position. Depending on the operation, this can be an existing terrain surface, a design surface or an As-Applied surface.
Cross Slope: Slope perpendicular to the main direction of travel, defining a surface's side-to-side inclination.
CSV (Comma Separated Values): A text-based format for tabular data that spreadsheet applications and text editors can open.
Cut Area: An area where reaching the target surface requires material removal.
Cut/Fill Map: A colour-coded map of the difference between the original and design surfaces.
Cut/Fill Ratio: The ratio of excavated material volume to the volume required after placement and compaction. A ratio of 1.2, for example, means 1.2 m³ of excavated material is needed to produce 1.0 m³ of compacted fill.
DEM (Digital Elevation Model): See Digital Elevation Model.
Design Surface: A digital model of the intended finished terrain after earthworks.
Detent: A John Deere hydraulic control mode in which iGrade™ can accept remote control commands from an external system such as T3RRA software.
Digital Elevation Model (DEM): A digital representation of terrain elevations over an area, used in surveying, design and machine-control applications.
Dynamic Blade Limit: A T3RRA feature that restricts cutting below the As-Applied surface to help prevent over-cutting and maintain the intended design.
Feather: Gradually blending a surface or design into another to make a smooth transition.
Fill Area: An area where reaching the target surface requires material addition.
Finishing: Final grading passes to achieve the target design elevation and surface quality.
Geo-referenced: Data or imagery containing geographic coordinates so it can be positioned accurately on the Earth's surface.
GNSS (Global Navigation Satellite System): The collective name for satellite positioning systems, including GPS, GLONASS, Galileo and BeiDou. Modern receivers typically improve positioning accuracy by using several constellations at once.
GPS (Global Positioning System): The United States satellite navigation system. Unless stated otherwise, this manual commonly uses GPS to mean GNSS positioning.
Grade: The elevation or slope required at a location relative to the design surface.
Haul: Transporting excavated material between locations.
Heading: The direction the machine points or travels, typically given in degrees relative to north.
Implementation: Constructing the designed terrain by moving material to match the target surface.
Importing/Exporting Dirt: Importing brings material into a project area from elsewhere. Exporting removes material from the project area for use or disposal elsewhere.
Land Forming: Reshaping terrain with curved or variable surfaces to improve drainage, irrigation or productivity.
Land Levelling: Reshaping terrain with predominantly planar surfaces to improve irrigation or drainage.
Look-Ahead: A control parameter that predicts machine movement and commands hydraulic adjustments slightly in advance, improving grading performance and reducing control error.
Machine Control: Hardware and software that automatically or semi-automatically position an implement according to a target design.
NMEA (National Marine Electronics Association): A communications standard commonly used for exchanging GNSS and navigation data between devices.
On-Grade: The state in which the implement cutting edge is at the elevation required to achieve the target design.
Original Surface: The surveyed or imported terrain model of the field before earthworks start.
Pixel: The smallest element of a raster surface. Its size determines surface resolution and the level of detail represented.
Primary Slope / Secondary Slope: Primary slope is the dominant direction of fall across a surface. Secondary slope, also called cross slope, is perpendicular to primary slope.
Project File: A proprietary T3RRA file containing survey, design and project information, with the 
.tci extension.
Raster: A grid of regularly spaced cells (pixels), each holding an elevation value.
Remote Control: A mode that lets an external device, such as T3RRA software, send hydraulic control commands to a compatible machine-control system.
RTK (Real-Time Kinematic): A high-accuracy GNSS positioning technique using corrections from a base station or network to achieve centimetre-level accuracy.
Settle (Shrink): The decrease in soil volume after material is placed and compacted.
Slope: The rate of elevation change across a surface. In T3RRA software, positive slope values mean downhill gradients.
Stockpile: A temporary pile of excavated material kept for later use.
Surface: A digital terrain representation, typically built from survey points or raster elevation data, for design, guidance and machine control.
Survey Point: A recorded position with horizontal coordinates (X, Y) and elevation (Z). Sets of survey points generate terrain surfaces.
TCM (Terrain Compensation Module): A John Deere sensor built into StarFire™ receivers that measures machine attitude to improve positioning and cross-slope accuracy.
Time-out: Communication termination because a device or application does not respond within the expected period.
Topography: The physical shape and surface characteristics of land in an area.
Topsoiling: Placing a topsoil layer over a finished surface to restore fertile material after earthworks.
Washboarding: Repeated vertical implement oscillation that creates a corrugated surface like a traditional washboard.
Zeroing: Calibrating measured elevations to the implement's physical cutting edge. This compensates for GPS antenna offsets, implement geometry, machine setup and differences between surveying and implementation so displayed elevations accurately represent the cutting edge position.