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2014-03-18 19:41:19 -0500 commented question ODE friction coefficient set to 0 but surface is not frictionless

I've confirmed that the issue still exists with Gazebo version 1.9.5. Somehow it appears that there is a dynamic friction happening, so any torque on the wheel will always be transferred to the ground, the wheel just needs to rotate faster... Is there any coefficient to adjust regarding dynamic friction?

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2014-02-08 14:48:17 -0500 commented question ODE friction coefficient set to 0 but surface is not frictionless

Owh, so the answer to your question is I change the SDF file at ~/.gazebo/models/polarisrangerev/model.sdf

2014-02-08 14:39:44 -0500 commented question ODE friction coefficient set to 0 but surface is not frictionless

Didn't noticed your comment. Sorry. I am just using the Polaris Ranger EV from the model database (actually deleted all the models so it was downloaded now), and then I change the Rear Right Wheel mu and m2 to 0 (lines 401 and 402). The complete file is here: http://pastebin.com/2pNZeCb9.

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2014-01-29 16:19:18 -0500 asked a question ODE friction coefficient set to 0 but surface is not frictionless

I'm using Gazebo version 1.9.3.

Even when settung the friction coefficient to 0 the surface still have some friction with the ground.

I'm testing with the Polaris Ranger EV, I set the Rear Right Wheel mu and m2 to 0, and then at the simulation apply torque to the Wheel joint. The robot move while I would expect it to remain in place and the wheel to slip!

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2013-09-19 16:31:01 -0500 asked a question turtlebot_gazebo world not loading models

I'm with Ubuntu 13.04 x64 and I have installed:

Package: gazebo
Version: 1.9.1-2~raring
Package: ros-hydro-turtlebot-gazebo
Version: 2.1.0-1raring-20130910-0236-+0000

When I run:

$ gazebo /usr/share/gazebo-1.9/worlds/willowgarage.world

It all works fine, the world is loaded and the models are cached at ~/.gazebo/models/

On the other hand if I run:

$ gazebo /opt/ros/hydro/share/turtlebot_gazebo/worlds/playground.world

It DOES NOT load any models:

Error [ModelDatabase.cc:408] Unable to download model[model://dumpster/meshes/dumpster.dae]
Error [SystemPaths.cc:371] File or path does not exist[""]
Error [MeshShape.cc:64] No mesh specified
Error [ModelDatabase.cc:408] Unable to download model[model://cube_20k/meshes/cube_20k.stl]
Error [SystemPaths.cc:371] File or path does not exist[""]
Error [MeshShape.cc:64] No mesh specified
Msg Waiting for model database update to complete...
Error [ModelDatabase.cc:408] Unable to download model[model://dumpster/meshes/dumpster.dae]

Gazebo GUI opens, and if I insert the models manually using the GUI library (Dumpster, Cube 20k, etc), they do get cached and next time I run it they load fine.