 | | | | | |
Hi,
Here is one more small walker:
More info, pictures and movies at:
http://www.wegmuller.org/lego/technic/walker/index.html
The steering system is inspired by the overall setup of the giant earth moving
machines known as walking drag lines.
Greetings,
David
| | | | | | | | | | | | | | | |
In lugnet.technic, David Wegmuller wrote:
COOL
It kinda reminds me of a contraption built by Bouser in the first season of
Junkyard Wars. OnDrew
| | | | | | | | | | | | | | | | |
In lugnet.technic, David Wegmuller wrote:
> Hi,
> Here is one more small walker:
>
> More info, pictures and movies at:
> <http://www.wegmuller.org/lego/technic/walker/index.html>
>
> The steering system is inspired by the overall setup of the giant earth
> moving machines known as walking drag lines.
Cool!
How few legs does a tank-steer walker need? I built one with eight previously
but six should be doable. Now it needs to be done minimalistic. Hm...
--
Best regards,
/Tobbe
<http://www.lotek.nu>
(remove SPAM when e-mailing)
| | | | | | | | | | | | | | | | |
In lugnet.technic, Tobbe Arnesson wrote:
> In lugnet.technic, David Wegmuller wrote:
> > Hi,
> > Here is one more small walker:
> Cool!
>
> How few legs does a tank-steer walker need? I built one with eight previously
> but six should be doable. Now it needs to be done minimalistic. Hm...
Hi Tobbe,
I think four legs would be enough: build it so the legs on a given side are 180
degrees out of phase.
To turn, run only one side with the other side stopped so both legs are touching
the ground.
Driving in a strait line can be achieved in two ways: synchronize the two sides,
so they are 90 degrees out of phase or drive each side alernatively for one
turn...
Now we have to build it to find out! I guess that what rainy weekends were
invented for...
Greetings,
David
| | | | | | | | | | | | | | | | | |
| |
|
In lugnet.technic, David Wegmuller wrote:
> In lugnet.technic, Tobbe Arnesson wrote:
> > In lugnet.technic, David Wegmuller wrote:
> > > Hi,
> > > Here is one more small walker:
> > Cool!
> >
> > How few legs does a tank-steer walker need? I built one with eight previously
> > but six should be doable. Now it needs to be done minimalistic. Hm...
>
> Hi Tobbe,
> I think four legs would be enough: build it so the legs on a given side are 180
> degrees out of phase.
> To turn, run only one side with the other side stopped so both legs are touching
> the ground.
> Driving in a strait line can be achieved in two ways: synchronize the two sides,
> so they are 90 degrees out of phase or drive each side alernatively for one
> turn...
> Now we have to build it to find out! I guess that what rainy weekends were
> invented for...
>
> Greetings,
> David
I have been working on pneumatic designs for a quad walker, where it always has
2 feet on the ground, and the transition between pairs of feet has four feet on
the ground. This prevents vertical lurching associated with 180 phase
quadraped.
I've been struggling a bit with all the pneumatic designs, but I think I can do
it in 10 pistons using my self synchronizing pneumatic designs mechanism.
Once I get that part working getting it to walk backwards, and turn right/left
in place will be straight forward using pneumatic multiplexers (like the ones I
made to make my first reversible pneumatic engine.)
I've also got paper designs for a quad with three of four feet always on the
ground, a five sided walker with four feet always on the ground, and a hexapod
with 5 of six always on the ground. These will take a *long* time to get to,
but they are looking do-able.
All pneumatics, no RCX controlling switches.... walkers are great!
Kevin
| | | | | | | | | | | | | | | | | |
| |
|
In lugnet.technic, Kevin L. Clague wrote:
> In lugnet.technic, David Wegmuller wrote:
> > In lugnet.technic, Tobbe Arnesson wrote:
> > > In lugnet.technic, David Wegmuller wrote:
> > > > Hi,
> > > > Here is one more small walker:
> > > Cool!
> > >
> > > How few legs does a tank-steer walker need? I built one with eight previously
> > > but six should be doable. Now it needs to be done minimalistic. Hm...
> >
> > Hi Tobbe,
> > I think four legs would be enough: build it so the legs on a given side are 180
> > degrees out of phase.
> > To turn, run only one side with the other side stopped so both legs are touching
> > the ground.
> > Driving in a strait line can be achieved in two ways: synchronize the two sides,
> > so they are 90 degrees out of phase or drive each side alernatively for one
> > turn...
> > Now we have to build it to find out! I guess that what rainy weekends were
> > invented for...
Or in my case, living in Minnesota, it is what all of Winter is for.
I like the alternate turns idea, because that way you also have 2/4/2/4 and
avoid the gravity well, and vertical lurching.
If you created a vertical launch mechanism used by hopping robots, you might be
able to get things done with three feet by launching one if the feet in the air,
and changing its position in flight. The foot in the center line would just
move forwards (or backwards), but the right or left foot could be run seperately
to achieve turning....
Kevin
| | | | | | |
