Introducing ScatCat rover

Hello everyone
We are developing ScatCat, a rover as part of a high school François Bazin (France) project.
The inspiration came from discovering the project JPL Open Source Rover Project
and then the University Rover Challenge
Every year we improve the rover’s mechanical, electrical and software systems.

ScatCatI


This model was used to test the motorisation and odometry

ScatCat II


This version use Jetson Nano, Teensy 4.1 on Ros Melodic.
Now, the weight is 18 kg and the max speed is 6 km/h. There is an IMU and a GPS for localization
ScatCatIII version under construction

We’re thinking about doing away with the belts on the motor, and installing a rocker boogie, an depth camera and an arm.
We practised with the camera and the solution for two arm axes was validated.

With the help, support and encouragement of Michaël Pinchedez

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Hello Bertrand,

That’s amazing !
I have a small question. You talk about ROS Melodic then about ROS 2 Humble ? So, what is your architecture ?

KR

Antoine

Awesome work. Let’s put some blades on the bottom of it and mow some grass with it! :wink:

Hello,
great project.
I would like to recommend using DYNAMIXEL servo motor for steering and robot arms to evolve your ScatCat into a more advanced exploration robot.
As you know, DYNAMIXEL is ROS supported and has been adopted in space projects such as the MMX mission.

Hi Antoine,

We have completed ScatCat II, which uses Jetson Nano and Ros Melodic with Teensy 4.1 (engine and odometry).
On ScatCat III in progress, we are abandoning Nvidia, it is too difficult for us to install Rtabmap for the D435i camera and Micro Ros for Teensy 4.1.
We chose a PC motherboard with Ubuntu 22.04 and Ros2 Humble. Rtabmap works, the next step is to use Micro Ros

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Thank you for introducing me to the MMX project.
Dynamixel servos seem to be a good solution. I’m starting to think about using the XC 430 W240 T model.
I still have to find the clamp

I guess you talk about the fact that NVidia’s latest distro for Jetson Nano is based on Ubuntu 18.04 right ?
Ran into the same issue before and solved it, if you are interested in… :slight_smile:

That was exactly my problem. Thank you for your suggestion, but I’ve been going in a different direction for a few months now.
And I’ll give a script in a while. It allows to install from Ubuntu 22.04, Ros2 Humble, Realsense_D435i, Rtabmap, Micro Ros.

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