laser_scan_assembler outputs no data
Hi forum, this has been driving me mad for a couple of days, can anyone help? I'm running ROS Indigo on Xubuntu 14.04 with a Hokuyo lidar on a remote machine. On my base machine I can see the /scan topic and get read data off it using rostopic echo /scan the output shows the data is in the "laser" frame.
I am trying to assemble scans using the laser_scan_assembler as in the tutorial, currently with this launch,
<launch> <node type="laser_scan_assembler" pkg="laser_assembler" output="screen" name="my_assembler"> </node> </launch>
And I broadcast tf's so that rosrun tf tf_echo laser map gives At time 1429639619.311 - Translation: [-0.050, 1.000, -0.250] - Rotation: in Quaternion [0.000, 0.000, 0.000, 1.000] in RPY [0.000, -0.000, 0.000]
However when I examine the assembler output there's no data, rosservice call assemble_scans 0 10 cloud: header: seq: 0 stamp: secs: 0 nsecs: 10 frame_id: map points: [] channels: []
I can't find any further info on this, and the tutorial doesn't give a full example, so could anyone help? I'm running here on a live robot, but have had similar problems running from a bag.
