Ask Your Question

vonunwerth's profile - activity

2020-09-12 11:40:28 -0500 received badge  Famous Question (source)
2020-09-12 07:54:28 -0500 commented question Unable to open a .world file

Are you sure, your world is properly fromatted?

2020-09-12 07:52:47 -0500 commented question "Add directory" error after catkin build

Where did you catkin build?

2020-09-12 07:51:01 -0500 marked best answer Texturize robot consisting of STL-files

I created robots links with CATIA exported them as STL an constructed my own robot with URDF. Now I'm able to move my little mobile robot around the world in Gazebo. Yeah. Then I mounted an Universal Robot Arm on top of my rover and there where textures on the arm. I looked in the XACRO-Description and found out, they use DAE files with textures to colorize the robots links. Is it possible (and if with which software) to import STL-files attach textures on it and export it as DAE as easy as possible? How would you texturize my existing robot with STL files?

Thanks for your help Max

2020-09-12 07:50:58 -0500 answered a question Texturize robot consisting of STL-files

In the end i used blender, imported the STLs and attached Materials to it. Like that: https://all3dp.com/2/blender-how-

2020-09-12 07:49:57 -0500 marked best answer Inertia for robot: Calculate by hand

Hi there, just for my understanding. Could you tell me, if I'm right with my thinking: If i want to setup my urdf robots inertias i just have to set the robots inertias main diagonal elements. If my center of mass is anywhere else than in the origin of my link, i change the origin of the inertia. If the mass of my link isn't equally distributed over the link i calculate a new center of mass. Is this correct or do i have to set the other elements of the inertia matrix anytime? If I've put the right main elements in my matrix Gazebo is calculating the other elements by itself. Or isn't that right? Best regard and thanks for your help Max

2020-09-12 07:49:52 -0500 answered a question Inertia for robot: Calculate by hand

Here we can find a list of inertias: https://en.wikipedia.org/wiki/List_of_moments_of_inertia Or use Meshlab https://w

2020-09-12 07:35:46 -0500 marked best answer Mapping with Zed Camera

Hi, i want to use our Stereolabs Zed Cam to get a map in Rviz. I set up zed-wrapper (and SDK and Cuda) successfully and startet the zed.launch file to get image data. The data is broadcasted to its topics and i can get it echoing the corresponding topics. Also in rqt the images can be shown. But if i open rviz i can't see anything. No image data, no pointcloud,... I loaded the rviz config file from stereolabs and the first different point on my system is: I have no map frame. There are only the following frames availabe: base_frame, base_link, odometry_frame, zed_camera_center, zed_{left,right}_camera_{optical}_frame. I found out it could be a problem with this tricky fixed frame and got the tf-tree attached below. There i can find two subtrees... Is this correct or is this my problem? With frame base_link chosen the rviz looks as in the image below. TF says "No transform from [base_frame] to frame [base_link]. I think this is a problem, but why and how to solve it? Nothing to see hereimage description

2020-09-12 07:34:42 -0500 received badge  Famous Question (source)
2020-09-12 07:34:35 -0500 marked best answer IMU: What is the "w" in the IMU data

Hello there, i use the Gazebo IMU-Plugin to generate sensor data of an IMU for my robot. An IMU message looks like the following:

header: ...
orientation:
x: -9.881865455454e-324
y: -9.881865455454e-324
z: 8.8755655245457e-17
w: 1.0
orientation_covariance ...

I understand the x,y,z koordinates, but what does that "w" mean?

Thanks for your help.

2020-07-06 04:23:02 -0500 received badge  Notable Question (source)
2020-02-10 17:04:21 -0500 received badge  Notable Question (source)
2020-02-10 17:04:21 -0500 received badge  Popular Question (source)
2019-12-11 08:31:40 -0500 received badge  Famous Question (source)
2019-11-21 05:47:46 -0500 commented question Connection of robot and computer XMLRPCLIB Error

Correct. But this error just happends if i change something (to a wrong ip for example). If the settings are "correct" t

2019-11-21 04:52:52 -0500 asked a question Connection of robot and computer XMLRPCLIB Error

Connection of robot and computer XMLRPCLIB Error Hi there, i want to connect our robot to a computer to send all message

2019-11-06 02:15:39 -0500 received badge  Famous Question (source)
2019-11-06 02:15:39 -0500 received badge  Notable Question (source)
2019-10-02 20:34:15 -0500 received badge  Notable Question (source)
2019-10-02 20:34:15 -0500 received badge  Popular Question (source)
2019-09-16 10:50:49 -0500 received badge  Notable Question (source)
2019-08-25 02:32:32 -0500 received badge  Popular Question (source)
2019-08-22 09:35:15 -0500 asked a question Mapping with Zed Camera

Mapping with Zed Camera Hi, i want to use our Stereolabs Zed Cam to get a map in Rviz. I set up zed-wrapper (and SDK and

2019-01-25 08:45:41 -0500 received badge  Famous Question (source)
2019-01-11 12:37:46 -0500 marked best answer MoveIt! Setup links are red

Hi, i created a robot model with xacro and added properties with MoveIt!. While configuring my robot in the MoveIt! Setup some links were in a light red. Does anyone see a problem with this rails (they are connected with the plate) image description

2019-01-11 12:36:57 -0500 received badge  Popular Question (source)
2019-01-09 07:07:21 -0500 received badge  Famous Question (source)
2018-11-07 13:53:34 -0500 received badge  Notable Question (source)
2018-10-11 21:20:28 -0500 received badge  Popular Question (source)
2018-09-05 02:46:12 -0500 received badge  Notable Question (source)
2018-09-04 02:05:27 -0500 received badge  Popular Question (source)
2018-09-03 09:01:42 -0500 asked a question IMU: What is the "w" in the IMU data

IMU: What is the "w" in the IMU data Hello there, i use the Gazebo IMU-Plugin to generate sensor data of an IMU for my

2018-07-30 01:05:20 -0500 received badge  Notable Question (source)
2018-07-27 19:56:46 -0500 received badge  Popular Question (source)
2018-07-27 14:36:16 -0500 edited question Inertia for robot: Calculate by hand

Inertia for robot: Calculate by hand Hi there, just for my understanding. Could you tell me, if I'm right with my thinki

2018-07-27 14:36:16 -0500 received badge  Editor (source)
2018-07-27 14:34:03 -0500 edited question Inertia for robot: Calculate by hand

Inertia for robot: Hi there, just for my understanding. Could you tell me, if I'm right with my thinking: If i want to s

2018-07-27 14:33:16 -0500 asked a question Inertia for robot: Calculate by hand

Inertia for robot: Hi there, just for my understanding. Could you tell me, if I'm right with my thinking: If i want to s

2018-07-27 14:26:24 -0500 commented answer Texturize robot consisting of STL-files

Ok thanks. I did it. Worked fine for me.

2018-07-27 14:25:55 -0500 marked best answer Texturize robot consisting of STL-files

I created robots links with CATIA exported them as STL an constructed my own robot with URDF. Now I'm able to move my little mobile robot around the world in Gazebo. Yeah. Then I mounted an Universal Robot Arm on top of my rover and there where textures on the arm. I looked in the XACRO-Description and found out, they use DAE files with textures to colorize the robots links. Is it possible (and if with which software) to import STL-files attach textures on it and export it as DAE as easy as possible? How would you texturize my existing robot with STL files?

Thanks for your help Max

2018-07-27 09:36:37 -0500 asked a question Controller for robots

Controller for robots Hi, i found two ways to setup a controller to drive around with my mobile platform robot and am a

2018-07-27 06:31:55 -0500 asked a question Gazebo recognize collision and show in rqt

Gazebo recognize collision and show in rqt In Gazebo it is possible to actvate self-collision for all links. Now the lin

2018-07-14 14:14:54 -0500 received badge  Popular Question (source)
2018-07-14 09:14:29 -0500 asked a question Texturize robot consisting of STL-files

Texturize robot consisting of STL-files I created robots links with CATIA exported them as STL an constructed my own rob

2018-07-14 09:14:23 -0500 asked a question Texturize robot consisting of STL-files

Texturize robot consisting of STL-files I created robots links with CATIA exported them as STL an constructed my own rob

2018-07-08 15:51:54 -0500 answered a question MoveIt! Setup links are red

Problem solved by myself. I did some weird things with the <color> tag in my xacro files. In my files i defined th

2018-07-08 15:32:03 -0500 asked a question MoveIt! Setup links are red

MoveIt! Setup links are red Hi, i created a robot model with xacro and added properties with MoveIt!. While configuring

2018-05-12 03:32:14 -0500 received badge  Famous Question (source)