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If your going to build such cool projects, you should order some more wires
from Lego Dacta. Great job!
--
Bob Fay
THE SHOP
http://www.ozbricks.com/bobfay
"Brian Sadowski" <twodijits@hotmail.com> wrote in message
news:GtG13J.K42@lugnet.com...
> Hello all,
> I've nearly completed my shrimp rover implementation. Development is on
> pause being I've completely run out of short Lego wires. I'm not sure if I
> will ever go any further with this, I've got a lot of ideas that I want to
> build, so I may end up taking it apart.
>
> I've posted some pictures on brickshelf:
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=14018
>
> Shrimp Features
> ---------------
>
> - Dual RCX. The RCX mounted higher up, and more visible, controls rotation
> and wheel power to the front and back wheels. It is responsible for • keeping
> the front and rear wheels in sync when turning. This RCX will have a
> micro-motor and technic switches that will multiplex the power between the
> drive and turn motor banks. (This isn't shown because I don't have enough
> wires). RCX 2, which is mounted underneath the first RCX and between the 2
> sets of boggied wheels, controls the power for the 4 central wheels.
>
> - 10 Motors (an 11th micro-motor will be added for motor multiplexing). • Each
> drive motor is geared with a worm gear, giving it the strength it needs • and
> preventing slippage when climbing. The micro-motors are also geared down
> with a worm gear.
>
> - Studless design, at the moment there are only a few visible studs, final
> design will be 100% stud-free. Most of the structure is comprised of
> liftarms, with relatively few bricks, less then 50 actually.
>
> - The rover has the ability to turn. Front and rear wheels are mounted • with
> turntables and dual micro-motors. Rotation sensors are located between the
> micro-motors for precise wheel placement when turning. Turning requires • all
> 6 drive motors to be shut off. The 4 micro-motors located front and back • are
> turned to rotate their respective wheels. The 4 micro motors are switched
> off and the 6 drive wheels turned back on. The rover will then begin • driving
> forward while turning. It is very easy for the wheels to tear apart the
> structure of the rover if the wheels where not aligned correctly.
>
> The rover can theoretically climb obstacles of around 2x to 2.5x the wheel
> diameter. Currently the rover has difficulty climbing anything greater • then
> the wheel diameter. The problem occurs when, for example, the front wheel • is
> climbing an object, and the remaining 5 wheels are pushing forward, • causing
> a lot of stress in the climbing wheel. Mounting sensors on some or all the
> wheels can solve this problem. When the sensor is depressed, then the • other
> wheels shut off allowing the wheel to climb.
>
> -Brian
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Message is in Reply To:
 | | Shrimp Rover
|
| Hello all, I've nearly completed my shrimp rover implementation. Development is on pause being I’ve completely run out of short Lego wires. I’m not sure if I will ever go any further with this, I’ve got a lot of ideas that I want to build, so I may (...) (25 years ago, 23-Mar-02, to lugnet.technic, lugnet.robotics, lugnet.build)
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