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<div class="moz-cite-prefix">Hi Doug,<br>
<br>
Nifty. <br>
<br>
A couple of things you might want to consider. <br>
<br>
The Mars rover-style rocker-boogie is, by design, very slow. In
order for the forward rocker to climb over an obstacle the rover
must of necessity first essentially come to a stop as it
encounters the object, to force rotation around rocker rather than
around the wheel. This means that the design enforces a very,
very slow forward motion. It cannot maintain constant forward
speed while climbing over obstacles, or dealing with rough
terrain, curbs, potholes, etc.<br>
<br>
If you are looking for a platform to compete with Scott's design
or jBot's, you will be hopelessly outgunned as far as time is
concerned. We'll wait all afternoon for you to complete the
course. There are other advantages to the rocker-boogie design,
of course. But speed is not one of them. Quite the contrary.<br>
<br>
The second design you linked to does not have this disadvantage,
and can maintain forward speed on uneven terrain. However it
appears that the platform does not scrub the wheels sideways very
well, particularly on off-road surfaces. So while straight line
travel will be more efficient than the Mars-rover type platform,
steering in an off-road environment will be clumsy at best.
Odometry, if that's one of the things you are interested in, will
probably be impossible. You may remember that the real Mars rover
can steer it's fore and aft wheels towards each other, in order to
pivot accurately. But that it a much more complex design than
those to which you've linked. And still very slow.<br>
<br>
Just some random thoughts. We studied these designs pretty
exhaustively when were were working on the 6-wheel outdoor rover.
That platform was not developed in a vacuum. ;>)<br>
<br>
cheers<br>
dpa<br>
<br>
<br>
<br>
<br>
<br>
<br>
On 12/05/2016 12:41 PM, paradug wrote:<br>
</div>
<blockquote cite="mid:3307E7DF9A074EC5A98CF73B498FFCA7@dougi7"
type="cite">
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<div style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR:
#000000">
<div>Here is another interesting 3D printed rover approach.
Again, watch the video.</div>
<div> </div>
<div><a moz-do-not-send="true"
title="http://www.thingiverse.com/thing:1583399"
style="href:
"http://www.thingiverse.com/thing:1583399""
href="http://www.thingiverse.com/thing:1583399">http://www.thingiverse.com/thing:1583399</a></div>
<div> </div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
</div>
<br>
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