Subject:
|
Re: How many people signed up for the NXT Developer's Program?
|
Newsgroups:
|
lugnet.robotics
|
Date:
|
Thu, 19 Jan 2006 06:20:33 GMT
|
Original-From:
|
Mr S <{szinn_the1@}StopSpammers{yahoo.com}>
|
Viewed:
|
2031 times
|
| |
|
|
John,
I got to thinking about recent threads about NXT being
studless, and since I'm off work sick (uggh, in
between naps, I lashed together a new chassis (for
DPRG club contests) trying to use small studded beams
and studless beams using studless design techniques.
It turned out 8" x 10" basic flat platform style that
has 4" ground clearance, uses the big RIS wheels with
motors mounted in the wheel housing assembly. Oh,
caster wheels on the back, one each side, so it looks
a bit strange. I tried not using any studded design
techniques, but in the end caved in so its about 60/40
studless/studded, and the studded part is mostly flat
panels to strengthen the flat platform. (think I'll
try inverted boat hull cathedral ceiling design) and
of course a small bit of studded to mount the motors.
Just have to mount some sensors on it, program it and
with some luck I'll be ready for the contest soon....
in the FALL.... of 2008!! :)
Yes, I enjoy building, tonight's result is TH-5, or
twin hull version 5. The drive wheels are encased in
lift-arm and 16 hole beams (7 beams wide, lifting the
platform to a height of 4 inches). It has the basic
shape of a catamaran boat... 16:40 tooth ratio with
chain drive so it should be quick... where to put the
RCX was an afterthought, the entire 8" x 10" platform
is empty...
It was fun, to just whip up that chassis, now all I
need is to hack some homebrew wheel encoders!! The
idea was to build a big platform where the RCX was not
part of the structure, do it high to look different,
and see what happens :) Building for fun is
theraputic... and being sickly, I needed it :)
--- John Brost <john.brost@gmail.com> wrote:
> In lugnet.robotics, Mr S <szinn_the1@yahoo.com>
> wrote:
> -snip-
> Your *average* differential drive/steer robot
> > with castor is not likely to do well on grass etc.
>
> True enough. I never even considered that type of
> setup because I didn't think
> it would work too well. However, a 2wd or 4wd rack
> & pinion setup might work.
> And with the big 4x4 off-roader wheels & tyres, we'd
> easily have 2" of ground
> clearance to the drive axles.
>
> > I've followed the information about RoboMagellan
> > closely, as well as other contests of similar • design.
> > I'm trying to imagine a Lego robot that is • competing
> > in the same arena as R/C monster truck based
> robots...
>
> You're right, I doubt a LEGO robot would have the
> speed to compete successfully
> with R/C trucks, although the rules do prohibit
> nitro trucks. But again, why
> not give it a shot? I don't know about you, but I
> rarely build things out of
> LEGO because I think they will help me out around
> the house or make the world a
> better place. :) Pratciality is boring. And
> constantly competing against Steve
> H in robot competitions has given me a new outlook
> on a successful robot. If it
> works, and does what I wanted, I usually consider it
> a success, whether it is
> the "best" of fastest one there or not. Of course
> winning is always nice.
>
> > I hoped you had some secret inside,
> > have-to-kill-you-if-I-told-you information on • building
> > such a beasty of a robot with Lego.
>
> Only what I've seen & read about the NXT motors here
> on LUGNET and other
> internet sources. I seem to recall one of the MUPs
> implying that the NXT motors
> just might be more powerful than what we're used to
> (I'd provide the
> conversation that made me think this, but I can't
> find it right now). It said
> something about the single axlehole possibly not
> being able to transmit all the
> torque that the motors could provide. If that is
> not the case, well there is
> always R/C buggy motors. It wouldn't be the first
> time I used a mindstorms
> controlled motor to throw a polarity switch to turn
> on R/C buggy motors.
>
> I don't know, maybe this is just one fool's dream,
> but I'd sure like the
> opportunity to try (and the sooner the better)!
>
> John
>
|
|
Message has 1 Reply:
Message is in Reply To:
77 Messages in This Thread:
 
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
This Message and its Replies on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
