MindStorms NXT Robot
This NXT controlled truck was
built to enter a remote control Rock Crawling event ran by the Lafayette LEGO
Robotics Club (LafLRC )
This event is also scheduled to take place at BrickWorld in Chicago in
June of 2007
My truck is designed to be pretty slow
The huge wheels came from the 4x4
Off Roader (set # 8466 from 2001),
and they were also in the Power
Puller (Set 8457 in 2000)
you can't find the big wheels like
I used, another way to create big wheels is to put two "motor cycle"
wheels together, and put an old-style tank tread around them, like
John was testing out here (above).
With the large wheels, the truck is easily able to drive across
"scree" (piles of LEGO bricks)
It doesn't have any suspension, but the frame will twist quite a
bit, to keep the wheels on the ground.
It's only two wheel drive, and only the front
wheels have steering, but it still has very good control. One thing
that gives it control is the ability to power each rear wheel
independently. This allows a combination of rack-and-pinion steering
for the front, and skid-steer for the rear wheels.
It's pretty solid, even if it rolls over, but the next step will
be to build a roll-cage for the front motor.
This is the remote I created a while
ago. It has two "speed" paddles, and one steering wheel.
The paddles each control one of the two motors that drive the
|At our first test, the course was
made from things that were around the house. Cushions, tables,
boxes... There's a bunch of pictures
|Here are several videos of my
truck driving around the course:|
Video 1, Video 2, Video 3,Video 4 and I also posted some info about the truck on NXTlog, and there are a few more pictures Here
Like-a-Rock - The Hauler
The next thing I needed to do was build a hauler for the
truck. Luckily, I have the 8285 Tow Truck, and the alternate
model is perfect to customize, and add an NXT.
I wasn't the first to do it. My
friend Martyn already did
(not my hauler)
After putting the NXT and two motors in
the cab, modified the trailer so I could fit my Rock Crawling
truck onto it. That way the truck can be towed to the
The remote was modified, so there's a button to switch between
controlling the truck, and controlling the truck... I mean
|The NXT & motors fit nicely inside the hauler, but some major work
had to be done to connect them to the drive and steering.|
The hauler even has a pair of light sensors, mounted to move with
the front wheels.
I have a few video clips of loading and unloading the truck from
the back of the hauler...
Unload Truck 1,
Unload Truck 2,
Unload Truck Close,
My friend John has made a few cool trucks...
He's using a PSP controller, and a sensor board from Mindsensors.com
|I haven't had a chance to see his latest creation
in person, but the pictures look pretty good, don't you think?|
|Other Team Hassenplug Stuff|