Questions tagged [encoder]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
0 votes
1 answer
22 views

Problem in reading an incremental encoder simulink

I'm trying to read an encoder to receive a velocity value. The robot is a differential drive robot based on ROS, to which I can send commands to the right and left wheels ranging from 0 to 1. Where 0 ...
Marià's user avatar
  • 101
0 votes
1 answer
57 views

Unable to sync Arduino Mega and RP4 using rosserial

Hello! I know there has been many people posting about this issue, but I have tried all of the solutions I have seen so far and I am still unable to establish the connection. Here is the error message ...
user avatar
0 votes
1 answer
10 views

How to broadcast hardware-encoded video from the logitech C920 to ROS?

The task is as follows: there is a camera logitech c920 with a built-in hardware video encoder in h264, it's connected to BeagleBone Blue (but it's really not important, since instead of it there may ...
user avatar
0 votes
1 answer
23 views

Write/Improve a ROS node to publish encoder data

Hi to all, I'm using two incremental encoders (SICK DFS60B) on my skid steering robot. A full wheel turn on each side generates about 2241114 pulses. I wrote a ROS node in C language in order to ...
user avatar
0 votes
1 answer
3 views

kobuki raw encoders ticks reset

I am reading raw encoders ticks values and generating the odometry using my own code, but I need to reset the encoders ticks every new run of my code. Is there a way to reset the encoders ticks ...
user avatar
0 votes
1 answer
10 views

PID: Infinite loop in a ROS listener node?

Hello, My team and I are participating in the 2017 Eurobot competition, and we are trying to use ROS on our robot. One problem we are facing, is how to write a PID node in ROS. I know there is an ...
user avatar
0 votes
1 answer
10 views

Arduino /cmd_vel and /odom with Pololu motors w/ encoder

Hi guys, I have been struggling with my robot for 3-4 days now. I want to publish to the /cmd_vel topic and then to the /odom topic using the Arduino MEGA connected to 4 Pololu motors with encoders. I ...
user avatar
0 votes
1 answer
33 views

DC MOTOR + ENCODER + PYTHON

Hello, everyone. I have the next equipment: https://www.pololu.com/product/2598 , https://www.pololu.com/product/2208 and raspberry pi. I want to control the dc motors via ROS and Python. Is it ...
user avatar
0 votes
1 answer
2 views

Suggest a wheel encoder

Hi, I want to buy wheel encoders to fix with the wheels of a car. Can anyone suggest simple encoders that they have already bought and interfaced with ROS? It would be of great help if you could share ...
user avatar
0 votes
2 answers
16 views

Using RPM as a form of Wheel Odometry

I am currently working on trying to create some form of wheel odometry to be used in our system to help determine the pose of our robot. There are no encoders on the wheels but the motor that is used ...
user avatar
0 votes
1 answer
61 views

How to ROS messages via bluetooth? (arduino)

Hi everyone, maybe this could be a novice question: As the title suggests, i would like to know if it's possible to do that. Specifically, my aim is to send messages from an arduino to the master ...
user avatar
0 votes
1 answer
8 views

Data from the encoder

How to get the motor shaft turning data from the encoders, located inside the robot base using C ++ or Python? Give a link to the answer if this question has been, please. Originally posted by ...
user avatar
0 votes
1 answer
6 views

Does ROS navigation stack need wheel encoder?

I have a mobile robot without wheel encoder. I have a 2D laser range finder. I want to run ROS navigation on this robot. I notice that amcl can provide tf between ...
user avatar
0 votes
1 answer
4 views

Integrate 1D-Odometry into EKF

Hi, I have an Ackermann-steering style robot whose tri-phase motor encoder I read. I would like to use this information as odometry with an robot_localization EKF node. The EKF fuses IMU yaw ...
user avatar
0 votes
1 answer
3 views

Integer overflow in differential_drive wheel encoders?

Hi, I'm reading a sensored brushless motor's tri-phase hall encoders in an effort to get odometry on my robot. I get six increments for one motor turn. The motor runs at something like 17000rpm at max ...
user avatar
0 votes
1 answer
6 views

How to Connect Wheel encoder to ROS computer

Hello ROS users, If I have a wheel encoder(Vehicle's hall sensor), and I want to input the signal to my ROS computer. But there is no information about it. Does anyone know that? Do I need to use the ...
user avatar
0 votes
1 answer
3 views

wheel encoders values

I am working on P3DX. i want to find wheel encoder values from p2os_driver library. In the p2os library, i m directly getting x, y and theta from buffer. Pls. Suggest. Originally posted by mrobo on ...
user avatar
0 votes
1 answer
4 views

How to publish MAXON Encoder in EPOS2 70/10 for building "nav_msgs/Odometry"

Hi, I'm learning ROS for graduating undergraduate course. I am following this Tutorial ' http://wiki.ros.org/navigation/Tutorials/RobotSetup ' to make mobile robot. I already made teleoperation ...
user avatar
0 votes
1 answer
8 views

adding "good" IMU data causes troubles to robot_pose_ekf

Hi, I am using a MMP for navigation and mapping. I got trouble while rotating with move_base and debugged the robot_pose_ekf data. Here are my strange results : when ...
user avatar
0 votes
1 answer
3 views

Input to robot_pose_ekf from IMU and Encoder frames IDs?

Hi, I'm running the robot_pose_ekf node subscribing to the /imu and /encoder. What should be the frame ID's of the msgs on those topics? Currently, my /encoder has frame_id: odom_combined and ...
user avatar
0 votes
1 answer
14 views

How to define joints in SolidWorks

Hi, I have a joint that is rotational controlled by a linear actuator as pictured: These actuators have feedback indicating their displacement which i would like to use as the feedback for control. ...
user avatar
0 votes
1 answer
14 views

odometry precision required for a good navigation

I have been using a neato XV-11 base with an Asus Xtion Pro Live 3D sensor mounted on it for mapping and navigation. Now I am willing to move to another platform: a cmRobot "the Element" ...
user avatar
0 votes
2 answers
4 views

ROS Answers SE migration: motor encoder

can i use stepper motor instead of dc motor with encoder to measure speed and the direction of the robot? to built eddie robot what type of encoder is used and what informtatiom it gives? can i make ...
user avatar
0 votes
1 answer
2 views

encoder for PR2 in gazebo

According to the tutorial of pr2_controllers : http://ros.org/wiki/pr2_controllers/Tutorials I can send a command and use the actionlib to control the controller, ...
user avatar
0 votes
2 answers
6 views

Create/Roomba odometry

Hi, I am thinking of getting a iRobot Create or a Roomba for a project which requires some no-so-bad odometry. I have gone through this thread and I have also noticed the following comment on ...
user avatar