jmrssc's profile - activity

I'm trying to localize a Pioneer P3dx with AMCL.

Whenever i run

rosrun amcl amcl

the node says that no data is being published in /scan. I've searched for it and people usually say that there need to be a transform from the odom frame to the laser frame (at least it was what I understood).

I've made a statical transform and when i run rqt_tf_tree I got /odom->/base_link->/base_laser. Ain't this the necessary? Because with this configuration i still cannot run AMCL correctly.

Any hints?

Hello, i'm really new in ros, so here's my question:

With AMCL how do i localize the robot?

I got the following warning continually on amcl node:

  [ WARN] [1425574394.999492201]: No laser scan received (and thus no pose updates 
  have been published) for 1425574394.999407 seconds.  Verify that data is being published
  on the /scan topic.

  [ WARN] [1425574394.999585497]: MessageFilter [target=odom ]: Dropped 100.00% of 
  messages so far. Please turn the [ros.amcl.message_notifier] rosconsole logger to DEBUG
  for more information.

but i have data on the /scan topic.

And in rviz, under "global status" i got:

No tf data. Actual error: Fixed Frame [map] does not exist

I've searched for it and many people say that it is related with some /tf transform that I need to change.

Can some of you give me a hint on how to solve this?

Yes! I think it is this.

Thank you!

yes! it might be this! thank you!

So, I have a *.pgm and *.yaml map and I want to use it, somehow, to reduce the odometry errors.

I need to get accurate locations to set point on a map and someone recomended this to me. However I couldn't find info about that anywhere.

Thanks!