Parallax 30055 Crawler Kit for the Parallax Small Robot

The Parallax 30055 Crawler Kit is a comprehensive motorized chassis expansion system designed to transform the Parallax Small Robot into a mobile platform with enhanced terrain navigation capabilities. Roboticists, embedded systems engineers, and educational institutions use this kit to develop autonomous ground vehicles with improved locomotion, obstacle avoidance, and sensor integration for research and prototyping applications. This kit solves the critical challenge of enabling wheeled mobility on uneven surfaces while maintaining precise control through standard servo and motor interfaces compatible with Parallax microcontrollers.

Product Overview

The Parallax 30055 Crawler Kit features a robust tracked or wheeled chassis design that significantly increases the payload capacity and terrain traversability of the base Small Robot platform. The kit utilizes high-torque DC motors with integrated gearboxes that deliver consistent power output across variable load conditions, coupled with a suspension system that distributes weight evenly across contact points. The modular construction allows for seamless integration with existing Parallax microcontroller boards such as the BASIC Stamp or Propeller, enabling direct motor control through standard digital output pins or PWM signals for variable speed operation.

What distinguishes the 30055 Crawler Kit is its engineering-grade construction with precision-molded plastic chassis components, reinforced motor mounts, and pre-drilled mounting points that accommodate additional sensors and accessories without structural compromise. The kit includes all necessary mechanical hardware, motor controllers, and wiring harnesses pre-assembled and tested, reducing integration time from hours to minutes. The low center of gravity design and wide wheelbase provide exceptional stability during acceleration and turning, while the modular wheel system allows quick swaps between different tread patterns for optimized performance on sand, gravel, carpet, or smooth surfaces.

Key Specifications

Specification	Details
Product Type	Motorized Robot Chassis Kit with Tracked or Wheeled Configuration
Brand	Parallax Inc.
Model Number	30055
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Motor Type	Dual High-Torque DC Motors with Integrated Gearbox
Motor Specifications	3-6V DC, 500 RPM (no-load), 2.5 kg-cm stall torque per motor
Maximum Payload Capacity	2-3 kg including electronics and sensors
Maximum Speed	0.5 meters per second on level surface
Chassis Material	High-impact ABS plastic with aluminum reinforcement points
Wheel/Track Diameter	65mm with interchangeable tread options
Battery Compatibility	4 AA batteries (6V) or 8 AA batteries (12V) with voltage regulator
Microcontroller Compatibility	BASIC Stamp, Propeller, Arduino with standard motor driver shield
Dimensions	180mm length x 140mm width x 90mm height (assembled)
Weight	450g chassis only, 650g with motors and battery holder

Key Features

• Dual Independent Motor Control: Two separate DC motors with individual PWM speed control enable differential steering and precise trajectory management for autonomous navigation algorithms
• Pre-Assembled Motor Mounts: Factory-installed and aligned motor assemblies eliminate mechanical calibration and ensure consistent torque delivery to both drive wheels
• Universal Microcontroller Integration: Direct compatibility with Parallax BASIC Stamp and Propeller boards via simple digital output pins, with optional motor driver modules for enhanced current handling
• Modular Wheel System: Quick-release wheel hubs accept multiple tread patterns including rubber tires, tank tracks, and specialty wheels for different terrain optimization
• Integrated Caster Wheel: Rear caster wheel provides stability and prevents chassis tipping during high-acceleration maneuvers on uneven ground
• Expandable Sensor Platform: Flat mounting surface on chassis top accommodates ultrasonic sensors, infrared detectors, and camera modules with pre-drilled attachment points
• Low-Profile Design: Compact 90mm height allows passage through standard doorways and tight spaces in indoor robotics competitions and research environments
• Durable Construction: Impact-resistant ABS plastic with aluminum reinforcement brackets withstands repeated collisions and outdoor field testing

Applications and Use Cases

• Educational Robotics Programs: Used in university-level embedded systems and robotics courses to teach motor control, PWM signal generation, and autonomous navigation algorithms with hands-on hardware experience
• Autonomous Ground Vehicle Research: Platform for developing and testing obstacle avoidance algorithms, SLAM navigation, and sensor fusion techniques in controlled laboratory and outdoor environments
• Robotics Competition Platforms: Foundation chassis for FIRST Robotics, RoboGames, and university robotics competitions requiring reliable mobility and customizable sensor integration
• Environmental Monitoring: Equipped with environmental sensors, the crawler can navigate outdoor terrain to collect soil samples, atmospheric data, or radiation measurements in hazardous or remote locations
• Surveillance and Inspection: Mounted with wireless camera and transmitter, enables remote exploration of confined spaces, pipe inspection, or facility surveillance in industrial settings
• Hobby and Maker Projects: Popular platform for enthusiasts building custom robots, line-following vehicles, or maze-solving autonomous systems with visual feedback and sensor integration

How to Use

Begin by assembling the Parallax 30055 Crawler Kit according to the detailed instruction manual, which includes mechanical assembly of the chassis frame, motor installation, and wheel attachment. Ensure both motors are properly aligned and rotate freely before proceeding. Connect the motor power leads to your motor driver circuit or Parallax motor control module, then connect the control pins to your microcontroller (BASIC Stamp or Propeller). Install four AA batteries in the battery holder and connect to the motor driver input, ensuring correct polarity to prevent component damage. Test each motor independently by sending PWM signals of varying duty cycles to verify forward and reverse rotation.

Once mechanical and electrical assembly is complete, load your navigation firmware onto the microcontroller. Start with simple forward-backward movement tests to calibrate motor speed differences and establish baseline performance. Implement differential speed control to achieve smooth turning by reducing speed on the inside motor during turns. For autonomous applications, mount your ultrasonic or infrared sensors on the chassis top using the pre-drilled holes, then integrate sensor reading code with your motor control logic. Conduct thorough testing on the target terrain type before deploying in field conditions, as wheel traction and motor performance vary significantly between surfaces.

Frequently Asked Questions

Is the Parallax 30055 Crawler Kit compatible with Arduino microcontroller boards?

Yes, the kit is compatible with Arduino boards when used with a standard motor driver shield or L298N dual motor driver module. The motor control pins connect to Arduino digital outputs configured for PWM operation. You will need to provide your own motor driver module, as the kit includes motor connections only. Parallax provides example code for BASIC Stamp and Propeller, but Arduino sketches can be easily adapted using standard PWM and digitalWrite functions.

What is the maximum weight capacity and how does it affect motor performance?

The maximum recommended payload is 2-3 kg including all electronics, sensors, and battery weight. Exceeding this capacity will significantly reduce maximum speed, increase current draw beyond motor specifications, and reduce battery runtime. The dual motors are rated for 2.5 kg-cm stall torque each, providing adequate power for the recommended load range. If your application requires higher payload capacity, consider upgrading to higher-voltage motors or using a gear ratio modifier, though this will reduce maximum speed proportionally.

Can I use a 12V power supply instead of the standard 6V battery configuration?

The kit motors are rated for 3-6V DC operation. Using 12V directly will cause immediate motor burnout and damage. However, you can use an 8 AA battery configuration (12V total) if you install a voltage regulator module that steps down the voltage to 5-6V for the motors. Alternatively, use a dedicated 6V power supply or battery pack rated for continuous motor current draw of approximately 1-2 amps per motor under load.

How do I achieve smooth turning and prevent the chassis from spinning in place?

Implement differential motor control by sending different PWM duty cycle values to each motor. For a left turn, reduce the left motor speed while maintaining right motor speed. For precise turning, you may need to calibrate the speed ratio between motors as manufacturing tolerances can cause slight speed variations. Start with a 90-10 speed ratio and adjust based on observed turning behavior. Use encoder feedback or distance sensors for closed-loop control to maintain accurate heading during autonomous navigation.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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• Returns: 7-day return policy on manufacturing defects only

Buy Parallax 30055 Crawler Kit for the Parallax Small Robot Online in India

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