This section is for items that may be useful for the end user, but are part of the manufacturing and kitting before the user gets a B3RB. They are not part of the normal assembly process.

This checklist is prepared for training units that will be shipped elsewhere This is a checklist for use if you have already assembled a unit and need to ship it to another location. It is to ensure the recipient has all the components needed, and the kit will be functional.

Short checklist for shipping

• Wires are zip tied in place

• QDEC wire is connected

• T1 connected between NavQPlus and MR-CANHUBK344

• CONSOLE cable is attached to NavQPlus. Tuck it in place.

• CONSOLE/DEBUG (DCD-LZ) cable is attached to CANHUBK344. Tuck it in place

• RGBLED wires are zip tied or taped up and not dangling

• NavQPlus Antenna is tucked under plastic but over metal

• Check that the rotating battery plug mount moves freely

• NXP, small Cognipilot, med Cognipilot, Emcraft stickers applied

Changes before shipment

• GPS module removed and packed under rear of buggy

• Check all screws are in place including thumbscrews

• Disassemble and tuck GPS module and MAST in place

• Invert LIDAR plate and lidar for shipping. Plastic Lidar Jack secure.

• Wipe down

• REMOVE:

  • USBA to USBC cable (only USBC-C is allowed)

  • original FLAT battery plug mount

  • If present - the two original RGB LED cables

• Add XT60 unsoldered male connector (Temporary addition)

Critical support components that must be in box

• JLINK debugger + DCD-LZ + FTDI Cable (note console/debug cable attached to buggy)

• Serial console cable for NavQPlus. FTDI + adapter board (Console cable attached to buggy)

• Cognipilot Neuralprobe

• Battery alarm

• IX Industrial Ethernet to RJ45 cable

Photos and videos of the checklist items

Checklist items before shipping

Changes to make before shipment

Ensure these critical items are included

Put them in a single bag.

REMOVE the following components if present

History

MR-B3RB is short for Mobile Robotics - Buggy3 Revision B. This is the second revision to a robotic vehicle called MR-Buggy3 introduced in 2023. Some people didn't like calling a product "buggy". So even though Buggy3 is a brave name, we decided to instead make it MR-B3RB as it is a nice and friendly robot like R2D2.

We took lessons learned from that platform and applied them as an upgrade for 2024.

The upgrades of the MR-B3RB are:

• Uses the same rugged metal base RC car, with readily available replacement and upgrade parts

• No need to change the steering servo

• Upgraded BLDC motor with gear reduction, integrated ESC (motor controller) and quadrature encoder output that can be used for vehicle odometry

• Metal upper chassis that can be removed as a module

• Power distribution board with additional connector matching and power supply for boards and servos.

• Removeable mounting plate for companion computer, real time processors, communications radios and any other add on components

• RGB addressable lighting

• Optional upgrade to plastic sides, front, rear and lidar arch mount

• Optional GPS / remote Magnetometer/ arming button

Currently this is the PRE-Production version, there will still be some updates coming to improve the modularity of the top plate, and provide additional mounting for user added 3d printed components.

Introduction

Base Mechanical Frame assembly

MR-B3RB-BMF (Pre-Production) assembly Video

Link: https://a360.co/3T5l4Yi

Bill of materials

Link: https://a360.co/47FQWXS

Procedure

1. Gather the buggy aluminum cage, the PDB board and the PDB mount.

Block Diagram: Power Distribution Board

The PDB (Power Distribution board) is where both power enters from the battrey , and also provides a number of connector "translations" to match the motor and LED lighting. Specialized connectors on the motor and encoder to translate to the Dupont-style or standard DroneCode connector pinouts. It should be noted that the block diagram above does not show ALL the power distribution connections, which are as follows:

• Battery input through a fuse

• Battery voltage and current measurement through the INA226

• 3x Battery voltage outputs on 5 pin JST-GH for NavQPlus, MR-CANHUBK344, Extra

• 5V regulating supply for LED lights, and powering PWM servo rail on MR-CANHUBK344 and therefore the Servo itself.

• PWM signals are consolidated into a single XHDP connector for ease of connection.

Block Diagram: GPS Module

The GPS combines UART, I2C for Compass, and GPIO for switches, LED, and Beeper into a single large DroneCode standard connector.

Block Diagram: Debugging interfaces

The DCD-LZ interface simply combines SWD and a UART on a single JST-GH Dronecode connector. Depending on your kit you may have any of the following debug adapter boards:

• FTDI USB-UART cable and adapter for UART/Console on the NavQPlus

• FTDI USB-UART cable + DCD-LZ adapter for MR-CANHUBK344 DCD-LZ interface

• In some systems you will find NeuralProbe board with USBC interface and connectors for UART/Console AND DCD-LZ interface. This board includes a USB-UART converter and also includes a button that will toggle the RST pin on SWD/JTAG interface. There is a 3rd interface on this board for Pixhawk V6X debug+uart connectors (not used here, used with NXP MR-VMU-RT1176)