Romi Chassis and Accessories

The versatile Romi chassis is a great starting point for your next mobile robot. It is a differential-drive platform with a diameter of 6.5″ (165 mm) and an integrated battery holder for six AA batteries. 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. These holes can be used for mounting your own electronics or the variety of Romi accessories we have available, such as the Robot Arm for Romi:


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:

Subcategories

Romi chassis kits include motors, wheels, one ball caster, battery contacts, and all other mechanical components required to assemble a chassis.

Get individual components as replacement parts for your Romi chassis or to design your own color scheme.


Products in category “Romi Chassis and Accessories”

Pololu item #: 3550
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
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Empower your Romi robot to manipulate its surroundings with this robotic arm accessory kit! The kit contains everything you need to build the arm, including a micro gripper and three servos—one for controlling the height of the arm, one for controlling the tilt of the gripper, and one for actuating the gripper paddles themselves. All three servos are specially modified to provide access to their feedback potentiometers, enabling higher-level closed-loop control of all three joints.

Pololu item #: 3560
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
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This Romi Chassis accessory offers a convenient way to expand your Romi robot vertically by adding new tiers. The expansion plate has the same diameter as the base plate, but we made it only a half circle to give you more expansion options. For example, when used as part of the Romi robot arm kit, it supports the arm in the back while leaving the front half of the Romi open. For a full-sized expansion platform, just combine two expansion plates. A mixture of mounting holes and slots give you the flexibility to mount components in a variety of orientations almost anywhere on the plate.

This expansion plate for the Romi chassis is made from black ABS.

Pololu item #: 3542
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
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Add quadrature encoders to the mini plastic gearmotors on your Romi chassis with this kit that uses a magnetic disc and Hall effect sensors to provide 12 counts per revolution of the motor shaft. The sensors operate from 3.5 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit.

Pololu item #: 3544
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
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The Romi 32U4 Control Board turns the Romi chassis into a programmable robot based on the Arduino-compatible ATmega32U4 MCU. Its features include integrated dual motor drivers, a versatile power circuit, and inertial sensors, as well as connections for quadrature encoders and an optional LCD. The board also has the ability to interface with an added Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled Romi robot.

Pololu item #: 3543
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
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Use this motor driver and power distribution board to get your Romi chassis running quickly. It offers all of the same features as the smaller Power Distribution board for Romi Chassis — battery contact slots, reverse voltage protection, several power switching options, and easy access to the various power busses — and adds a two-channel motor driver and powerful switching step-down regulator that can supply a continuous 2.5 A at 5 V or 3.3 V. Just add a microcontroller and sensors to complete your Romi robot.

Pololu item #: 3541
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This power distribution board is designed specifically for the Romi chassis as a convenient way to access the chassis’s battery power and pass that on the rest of the electronics that make up your robot. It has slots for soldering directly to the chassis’s battery contacts offers reverse voltage protection, several power switching options, and easy access to the various power busses. Just add your own motor drivers, microcontroller, and sensors to complete your Romi robot.

Pololu item #: 3540
Brand: Pololu
Status: Active and Preferred 
This item could qualify for free shipping Free shipping in USA over $60 
Temporarily out of stock. See product page to backorder.
Out of stock.
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This set of six battery contacts completes the six AA battery holder molded into the Romi chassis base plate. A set is included in each Romi Chassis Kit.

Related Categories

Robot Kits
Chassis
Zumo 32U4 Robot
Balboa Robot and Accessories
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