Romi Chassis Kit - Black

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Pololu item #: 3500
Brand: Pololu
Status: Active and Preferred 
RoHS 3 compliant


The versatile Romi chassis is a great starting point for your next mobile robot. This kit includes all the basic mechanical parts to get up and running, including two motors, two wheels, one ball caster, and battery contacts. The wheels and ball are white; all other plastic components are black.

Alternatives available with variations in these parameter(s): color Select variant…

Pictures

Romi Chassis Kit – Black.

Romi Chassis Kit – Pink.

Romi Chassis Kit – Red.

Romi Chassis Kit – Yellow.

Romi Chassis Kit – Blue.

Romi Chassis Kit – White.

Contents of the Romi Chassis Kit – Black.

Contents of the Romi Chassis Kit – Pink.

Contents of the Romi Chassis Kit – Red.

Contents of the Romi Chassis Kit – Yellow.

Contents of the Romi Chassis Kit – Blue.

Contents of the Romi Chassis Kit – White.

Romi Chassis bottom view with AA batteries installed (shown with optional front ball caster).

Romi with a banana for scale.

Basic dimension diagram of the Romi Chassis.

Power Distribution Board for Romi Chassis.

Motor Driver and Power Distribution Board for Romi Chassis.

Power Distribution Board for Romi Chassis.

Romi 32U4 Control Board with LCD on a Romi chassis.

Romi 32U4 Control Board with Raspberry Pi on a Romi chassis.

Custom robot made from a Romi chassis, a Motor Driver and Power Distribution Board for Romi Chassis, and an A-Star 32U4 Prime SV.

Romi arm with horizontal gripper orientation installed on a Romi.

Romi arm with vertical gripper orientation installed on a Romi.

Side view of the Romi with Robot Arm and various electronics to enable RC control.




Overview

The Romi chassis is a differential-drive mobile robot platform with a diameter of 6.5″ (165 mm) and an integrated battery holder for six AA batteries (not included). The drive wheels are located on a diameter of the circular base plate, allowing for turns or spinning in place. A large, fixed ball caster in the rear provides a smooth third point of contact, and a second ball caster (not included) can optionally be added to the front. The chassis uses 70×8mm Pololu wheels and Mini Plastic Gearmotors with extended backshafts to enable quadrature encoders for position feedback.

The Romi chassis has an abundance of general-purpose mounting holes and slots intended for various sizes of screws (not included) such as #2-56, #4-40, M2, and M3. These holes can be used for mounting your electronics, such as your microcontroller, motor drivers, and sensors.

The plastic components making up the chassis are available in six colors, either individually (for use as replacement parts or to make custom color combinations) or in kits that include motors and battery contacts.

This animation shows how the parts fit together:

See the user’s guide for more complete assembly instructions.

Details for item #3500

Kit contents

Additional things you will need

You will likely also need a soldering iron for connecting your motors and batteries to your electronics.

Optional accessories

Contents of the Robot Arm Kit for Romi.

Romi arm with horizontal gripper orientation installed on a Romi.


Romi Chassis Expansion Plate mounted on a Romi with a Romi 32U4 Control Board and Raspberry Pi.

Four linked Romi Chassis Expansion Plates (two pairs) mounted on a blue Romi chassis using aluminum standoffs.

Power Distribution Board for Romi Chassis on a black chassis.

Power Distribution Board for Romi Chassis.

Motor Driver and Power Distribution Board for Romi Chassis.

Motor Driver and Power Distribution Board for Romi Chassis.

Romi 32U4 Control Board on a Romi chassis, top view.

Romi 32U4 Control Board with LCD on a Romi chassis.

The included low-profile headers are still long enough to work with our pre-crimped jumper wires.

The Romi Encoder can plug directly into the Motor Driver and Power Distribution Board for Romi Chassis.

Romi Chassis Base Plate – White.

Romi Chassis Motor Clip Pair – Blue.

Romi Chassis Ball Caster Kit – Red.

Pololu Wheel 70×8mm Pair – Yellow.

Dimensions

Size: 163 × 149 × 70 mm
Weight: 160 g1

General specifications

Color: black

Notes:

1
Without batteries.

Documentation and other information

File downloads

Frequently-asked questions

No FAQs available.

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