Problem with basic tutorial

asked 2013-06-18 12:08:07 -0500

Pawel Bogdan
3 ●1 ●2

Hi, I'm totally new in ROS and turtlebot 2. I followed tutorial, but I met some difficulties with basic tutorial about 3D Visualisation. I don't get any errors or even warnings, but RViz doesn't draw anything. I checked that in /scan I am getting messages:

header: seq: 335 stamp: secs: 1371592730 nsecs: 128651578 frame_id: /camera_depth_frame angle_min: -0.546698212624 angle_max: 0.546698212624 angle_increment: 0.00170843186788 time_increment: 0.0 scan_time: 0.0329999998212 range_min: 0.449999988079 range_max: 10.0 ranges: [nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan, nan ...

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answered 2013-06-18 21:43:55 -0500

Lucile

318 ●4 ●6 ●17

This error has been reported many times yet. You should try to launch roslaunch openni_launch openni.launch depth_registration:=false instead of 3dsensor.launch. I bet you will have better results.

If not, then you might be struggling with a different problem.

I don't know exactly why, but it seems that depth_registration is not available on Turtlebot2's 32-bits laptop, and 3dsensor.launch set it to true by default. Some people switched to a 64-bits computer and said it worked better. I personally did follow this tutorial : igorbarbosa.com/articles/how-to-install-kin-in-linux-mint-12-ubuntu/ to reinstall the kinect on the 32-bits laptop and then upgraded the ROS packages again. It did solve the problem on my Turtlebot2.

But if you don't need registered topic, just edit 3sensor.launch and set depth_registration to false...

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Thanks for help! Changes in 3dsensor.launch fixed my problem.

Pawel Bogdan ( 2013-06-19 00:36:47 -0500 )edit

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