Building tracked vehicle in Webots, problem

[msimanic4-cmd]

Hello,

I am trying to build a tracked robot using the Track node in Webots R2025a.

The tracks are animated correctly and the PositionSensors show changing values, but the robot does not move at all. The tracks visually rotate while the robot stays in place.

I already tried:

• adding boundingObject to the Track nodes
• adding physics to the chassis
• changing friction/contact settings
• restructuring the robot hierarchy

At one point the tracks even became unstable and detached when physics was added to the Robot node.

Could you please explain what is missing in my setup or what is the correct hierarchy for a functional tracked robot using Track nodes?

I can also provide the complete .wbt file if needed.

Thank you.

[omichel]

I would recommend you to compare your world file with the provided example track.wbt. It is likely some Physics node is missing in your design. If you don't see the difference, try to restart step-by-step from the example and modify it by adding/removing parts (using copy/paste in the track.wbt text file) so that it get closer and closer to your .wbt file.