Laserscan Node : cann't get ant data

[bobov4]

I'm newbie in ROS, sorry if i ask you a nonsense question.

I have hector_quadrotor project which use VLP-16 as a LiDAR sensor and it give me sensor_msgs/PointCloud2 data in /points_in topic.

I try to convert this PointCloud2 to LaserScan with but_velodyne_proc/Laserscan Node but topic /velodyne/scan and /velodyne_points return nothing with no error.

I'm not sure that i understand Laserscan Node correctly, the input of this node is topic named /points_in right?