[Dprglist] Open Source Curiosity type rover from NASA

[Doug Paradis]

Eric,
     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 thingiverse.com. These are interesting:
 https://www.thingiverse.com/thing:1318414
<https://www.thingiverse.com/thing:1318414> and
 https://www.thingiverse.com/thing:1025108
<https://www.thingiverse.com/thing:1025108> .

    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.

Regards,
Doug P.

On Fri, Aug 3, 2018 at 3:31 PM, Eric Yundt via DPRGlist <
dprglist at lists.dprg.org> wrote:

> James,
>
> 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!
>
>     JPL Open Source Rover Website
>     https://opensourcerover.jpl.nasa.gov/
>
> Trying to go there with my completely up-to-date Chrome browser gets me to:
>
>     https://opensourcerover.jpl.nasa.gov/unsupported.html
>     This website is optimized for certain browsers and devices.
>     Please upgrade your browser.
>
> Maybe rather than $2500 for JPL's Rover build I can get my kicks out of
> this PVC Rocker-Bogie build?
>
>     How to Make a Mars Rover / Rocker bogie Robot
>     https://www.youtube.com/watch?v=3Zx7tGtwF5g
>
> 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?
> Avoidance?  Maybe the Boston Dynamics Sand Flea solution?  jajaja.
>
>     Sand Flea Jumping Robot
>     https://www.youtube.com/watch?v=6b4ZZQkcNEo
>
> 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...
> Very nice videos on your jBot page David!  Thanks for sharing.
>
> --
> Eric
>
> On Fri, Aug 3, 2018 at 1:35 PM, James LeRoy via DPRGlist <
> dprglist at lists.dprg.org> wrote:
>
>> Even if you don't actually build one.  Studying how they designed it is
>> very informative.
>>
>> https://github.com/nasa-jpl/open-source-rover
>>
>>
>> On 8/3/2018 11:58 AM, Doug Paradis via DPRGlist wrote:
>>
>> Link to the an article about the open source rover that NASA released
>> based on Curiosity.
>>
>> <http://goog_1122237558>
>> https://www.extremetech.com/extreme/274705-nasas-open-source
>> -rover-is-a-miniature-curiosity-you-can-build-yourself
>>
>> Regards,
>> Doug P.
>>
>>
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