<div dir="ltr">Eric,<div> The Mars style rover that you linked the YouTube video, lacks the Differential Pivot that is in the NASA robot. It is used to keep all the wheels on the ground when only one side is going over an obstacle. If you look at the video you linked the author is showing the robot go up stairs where the obstacle is seen by both wheel sets.However, it is still a cool rover. There is a few Mars rovers on <a href="http://thingiverse.com">thingiverse.com</a>. These are interesting:<a href="https://www.thingiverse.com/thing:1318414"> https://www.thingiverse.com/thing:1318414</a> and <a href="https://www.thingiverse.com/thing:1025108"> https://www.thingiverse.com/thing:1025108</a> . </div><div> </div><div> BTW, I have found some issues with the NASA Rovers BOM. The motors shown in the Excel spreadsheet do not match the motors shown in the pictures. The pictures show the corner motors with encoders.</div><div><br></div><div>Regards,</div><div>Doug P.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 3, 2018 at 3:31 PM, Eric Yundt via DPRGlist <span dir="ltr"><<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">James,<div><br></div><div>I have always wanted to build a Rocker-Bogie chassis Robot. I've got some rough terrain to use for my own version of RoboColumbus that I thought would be a perfect candidate for a Rocker-Bogie chassis. However JPL's Open Source Rover Website hates me!<div><br></div><div> JPL Open Source Rover Website</div><div> <a href="https://opensourcerover.jpl.nasa.gov/" target="_blank">https://opensourcerover.jpl.<wbr>nasa.gov/</a></div><div><br></div><div>Trying to go there with my completely up-to-date Chrome browser gets me to:</div><div><br></div><div> <a href="https://opensourcerover.jpl.nasa.gov/unsupported.html" target="_blank">https://opensourcerover.jpl.<wbr>nasa.gov/unsupported.html</a></div><div><div style="font-size:small;text-decoration-style:initial;text-decoration-color:initial"> This website is optimized for certain browsers and devices. </div><div style="font-size:small;text-decoration-style:initial;text-decoration-color:initial"> Please upgrade your browser.</div><br class="m_7014260638266764721gmail-Apple-interchange-newline">Maybe rather than $2500 for JPL's Rover build I can get my kicks out of this PVC Rocker-Bogie build?</div><div><br></div><div> How to Make a Mars Rover / Rocker bogie Robot</div><div> <a href="https://www.youtube.com/watch?v=3Zx7tGtwF5g" target="_blank">https://www.youtube.com/<wbr>watch?v=3Zx7tGtwF5g</a></div><div class="gmail_extra"><br></div><div class="gmail_extra">I noticed David Anderson mentioned they ruled out Rocker-Bogie chassis when planning jBot for lack of speed. While it is pretty much true it must come to complete stop when climbing over a large obstacle, what is the alternative? </div><div class="gmail_extra">Avoidance? Maybe the Boston Dynamics Sand Flea solution? jajaja.<br></div><div class="gmail_extra"><br></div><div class="gmail_extra"> Sand Flea Jumping Robot<br></div><div class="gmail_extra"> <a href="https://www.youtube.com/watch?v=6b4ZZQkcNEo" target="_blank">https://www.youtube.com/watch?<wbr>v=6b4ZZQkcNEo</a><br></div><div class="gmail_extra"><br></div><div class="gmail_extra"><div class="gmail_extra" style="font-size:small;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial">jBot seems to pretty robustly climb over obstacles although has a little bit of climbing pause when climbing stairs -- especially the initial step and whenever the front wheels are not already airborne...</div>Very nice videos on your jBot page David! Thanks for sharing.<br class="m_7014260638266764721gmail-Apple-interchange-newline"><br></div><div class="gmail_extra">--</div><div class="gmail_extra">Eric</div><div><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 3, 2018 at 1:35 PM, James LeRoy via DPRGlist <span dir="ltr"><<a href="mailto:dprglist@lists.dprg.org" target="_blank">dprglist@lists.dprg.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
Even if you don't actually build one. Studying how they designed it
is very informative.<br>
<br>
<a class="m_7014260638266764721gmail-m_195658679856836695moz-txt-link-freetext" href="https://github.com/nasa-jpl/open-source-rover" target="_blank">https://github.com/nasa-jpl/op<wbr>en-source-rover</a><br>
<br>
<br>
<div class="m_7014260638266764721gmail-m_195658679856836695moz-cite-prefix">On 8/3/2018 11:58 AM, Doug Paradis via
DPRGlist wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Link to the an article about the open source rover
that NASA released based on Curiosity.
<div><a href="http://goog_1122237558" target="_blank"><br>
</a></div>
<div><a href="https://www.extremetech.com/extreme/274705-nasas-open-source-rover-is-a-miniature-curiosity-you-can-build-yourself" target="_blank">https://www.extremetech.com/ex<wbr>treme/274705-nasas-open-source<wbr>-rover-is-a-miniature-curiosit<wbr>y-you-can-build-yourself</a><br>
</div>
<div><br>
</div>
<div>Regards,</div>
<div>Doug P.</div>
</div>
<br>
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