Category Archives: Rotacaster Omniwheels

EVShield Holonomic Platform with LCD & Wii Nun-chuck

EVShield
A few days ago I received an EVShield from OpenElectrons (Mindsensors) to Beta test. The EVShield fits on top of an Arduino Microcontroller and operates in a similar manor to the LEGO Mindstorms EV3 Programmable Brick. The EVShield allows you to connect the full range of LEGO Mindstorms EV3 & NXT, Sensors and Motors to an Arduino Uno Board.

NXShield: Arduino Powered LEGO Holonomic Platform

NXShield-Holonomic-Platform
I have just developed a LEGO Mindstorms Holonomic Platform Robot powered by an OpenElectrons NXShield for the Arduino Mega.

I have just had 4 day up at Burnie on Tasmania’s North-west coast at the “Brixhibition Burnie” with my Robots. Among the robots I took was a OpenElectrons NXShield Powered Holonomic Platform which survived the abuse from the general public who where controlling it for some 18hrs, without it missing a beat.

Holonomic Platform for 125mm Rotacaster Omniwheels

I’ve been working on a very solid, Holonomic Platform to be used with the large 125mm Rotacaster Omniwheels as part of my display for the TAZ-Brick Collector Club’s Brixhibition to be held on the weekend of 20-21 April 2013.

Wii-NunChuck Controlled Mindstorms NXT Soccer Robot

Wii Soccer Bot
For the forth coming [brixhibition] Exhibition at the end of April, I have been asked to set-up and run a couple of interactive Robot Soccer fields.The Robots needed to be robust and reliable as members of the public will be interacting with them. Also they need to have a a simple, intuitive, and easy to use hand held controller. I have used Sony Playstation PS-2 Controllers, but they have far too many controls that would be unused and confusing to the first time operator. I chose to use a Nintendo Wii® Nun-Chuck Controller for the job.

Rotacasters: Big, Bigger, Biggest!

Yes it ‘s another Holonomic Platform Robot, but this ones special. I built this Mindstorms Robot to celebrate a package that arrived in the post today from Rotacaster Australia. Yes, more omni-wheels to’ Beta Test’. But these are monsters compared to the original 48mm (2″) Rotacaters.

PS2 Controlled Holonomic Platform Using RobotC

Yes, another Holonomic Platform. My son, Anthony requested a Holonomic robot to take to school for show-and-tell. So here it is with a few scholarly extras, including the [robotc] code.
A Holonomic platform is one of the many types of Holonomic drive trains — it can move forward and backward as well as left or right without turning. The Holonomic platform can move in any direction instantaneously unlike conventional four wheeled vehicles.

Melon Factor – Part 1

Part I of my NXTLog FoodFactor Competition Entry needed a method to transport models of the large open top pallet type bins used to transport vegetables, such as potatoes, cabbages and pumpkins. I decided on a Forklift Truck to do the job.

NXT Quad Drive Holomonic Platform

I’ve been working on a new LEGO Mindstorms NXT Dual Drive, Quad Holomonic Platform. This Robot uses dual Rotacasters on each of the four axis’s. The Robot also uses four NXT Ultrasonic Sensor between each of the four axis’s. The four Ultrasonic Sensor work in ‘MODE 3: Event Capture Mode’. The Ultrasonic Sensor are cycled through one-at-a-time, to avoid interference between each of the sensors.

Mars Rotacaster Rover – ‘Mark II’

Lookout NASA, you have Rover competition. And it uses the amazing Rotacasters for unsurpassed maneuverability in confined spaces. The Mars Rotacaster Rover is based on the current NASA Mars Rovers with their unique suspension set-up.

A Simple LEGO Mindstorms NXT Trike Base

I needed a simple Trike type LEGO Mindstorms NXT Vehicle Base, that had to meet the following criteria:
  • Quick and Easy to build
  • Easy access to the Recharge socket on the NXT Li-Po Battery
  • Easy access to the NXT’s Sensor Ports and Motor Ports
  • Easy access to mount various type of sensors
  • Rotate as close as possible to the Robots own footprint

The Mars Rotacaster Rover – Part II

Lookout NASA, you have Rover competition. And it uses the amazing Rotacaster Omni-wheels for unsurpassed manoeuvrability in confined spaces. The Mars Rotacaster Rover is based on the current NASA Mars Rovers with their unique suspension set-up.

The Mars Rotacaster Rover

Part I

Lookout NASA, you have Rover competition. And it uses the amazing Rotacaster Omni-wheels for unsurpassed maneuverability in confined spaces. There is no need of a steering mechanism to turn the Rotacaster Rover thanks to the unique wheel design.

Build a Solid LEGO NXT Killough Platform

Building a solid and reliable Killough Type Platform is not easy using the standard LEGO Technic Parts List. For the last 12 plus months, I have been refining my designs which use the standard NXT Motors. Due to the NXT Motors shape, keeping the Robot’s overall footprint as small as possible has been difficult.

Mindstorms NXT Soccer Playing Robot

This is the Mark I version of my LEGO Mindstorms Soccer Playing Robot.  The Robot relies on 3x Rotacaster omni-whheels in a Holonomic Platform configuration for movement. The three Rotacasters are driven by 3x NXT Motors connected to the NXT Brick.

More on the New & Improved Rotacaster Omni-wheels

I received a a new batch of Rotacaster Omni-wheels several weeks ago which look and work fantastic. I gave them a good test run way back on 15th June 2011 and videoed my results. It’s a while, but here they are fitted to a Killough type platform powered by LEGO Mindstorms NXT kit fitted with 3x NXT Motors to drive the Rotacasters.



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