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2023-01-05 07:03:41 -0500 received badge  Civic Duty (source)
2023-01-04 04:52:12 -0500 commented question Invoking "make -j4 -l4" failed, Raspberry Pi 4(8GB )

Could you include your code? Or a reference to the ros_arduino you used? you have undefined reference to the bond packa

2023-01-04 04:50:55 -0500 commented question Invoking "make -j4 -l4" failed, Raspberry Pi 4(8GB )

Could you include your code? Or a reference to the ros_arduino you used? you have undefined reference to the bond packa

2023-01-03 08:02:23 -0500 answered a question best practice about creating new node from existing one

moveit_servo holds indeed panda specific values. Best practice would be to have a generic upstream package , that way

2022-12-28 09:37:20 -0500 commented question How to transport files between ROS and Android?

OOM as in out of memory? Then devide the image in chunks, and encode & send them separately. relevant

2022-06-10 07:26:20 -0500 commented question Rviz won't start properly, no error

Can you add the output to your question instead of comment? and tell us what you tried, and what worked and what not: be

2022-06-10 07:22:18 -0500 commented question How to delete specific cluster from pointclouds?

This question is not ROS related. The tutorial you followed is a good starting point, together with this tutorial. And h

2022-06-10 07:02:57 -0500 commented question Rviz won't start properly, no error

try running it with '--debug' and post the output. also read through this relevant question

2022-05-25 08:05:33 -0500 received badge  Good Answer (source)
2022-05-25 08:05:33 -0500 received badge  Enlightened (source)
2022-05-24 02:38:20 -0500 commented answer Best way to connect IMU.

What's wrong with the Raspberry Pi GPIO? maybe for specific usecases it doesn't meet requirements, but the raspberry pi

2022-05-13 07:50:23 -0500 commented question RGBD-SLAM Link missing googlecode

Look at the wiki.ros link you pasted.. it has a reference to github: https://github.com/felixendres/rgbdslam_v2 Note tha

2022-04-25 06:39:04 -0500 commented answer Difference between effort_controllers/JointVelocityController and velocity_controllers/JointVelocityController?

The Effort_controller/JointVelocityComtroller outputs effort (torque) commands to the hardware interface. the Velocity_c

2022-04-25 06:31:50 -0500 commented question MoveItCpp for 5 DoF arm doesnt work

Try some different planning parameters: other planner, more attempts , more time, Also does controlling using joint an

2022-04-15 04:00:44 -0500 commented question Fixed distance between end-effectors of two robots.

there are some similair questions on this forum, this is a good starting point: https://answers.ros.org/question/299183

2022-03-16 02:41:09 -0500 commented question how can i set joint velocity during execution

Sorry I didn't get the from the question. I don't have experience with that. I think you have to look into 'time paramet

2022-03-15 07:44:00 -0500 commented question how can i set joint velocity during execution

Please use the search option on this forum first: https://answers.ros.org/question/251282/how-to-change-velocity-acceler

2022-03-10 08:27:50 -0500 commented question Rosserial problem with std_msgs on Arduino

Can you add the code as preformatted text? this is hard to read. It's also missing the # before include. And why do you

2022-03-08 09:09:45 -0500 commented question Transfer the numpy array as ros msg

what did you try? why didn't that work? which ROS version? a quick google search came up with this package to convert co

2022-03-08 09:09:28 -0500 commented question Transfer the numpy array as ros msg

what did you try? why didn't that work? a quick google search came up with this package to convert common ros to and fro

2022-01-15 05:48:56 -0500 commented question How does one get the x and y coordinates of a robot?

I think you're not googling right, because you're question is also very vague. do you mean the robot base pose relative

2022-01-15 05:48:29 -0500 commented question How does one get the x and y coordinates of a robot?

I think you're not googling right, because you're question is also very vague. do you mean the robot pose relative to /w

2022-01-15 05:43:32 -0500 commented answer rostopic echo doesn't return any data

do you use different namespaces? if so you have to add that namespace in front of the topic. If not I agree that the pro

2022-01-15 05:38:56 -0500 answered a question Best way to connect IMU.

I'd recommend to ditch the Arduino and connect the IMU and motor controllers directly to your RPI. This way you don't ha

2021-12-04 07:49:18 -0500 commented question Store Terminal Output in a File

Your problem is not ROS related, but cpp related. Here is a similair question, and here the cpp documentation.

2021-08-24 09:23:05 -0500 commented answer ROS communication

You are correct, but you can write a node in ROS that handles the ros_bridge messages. that way you can launch a node by

2021-08-24 09:21:02 -0500 commented answer ROS communication

from http://wiki.ros.org/rosbridge_suite "The protocol covers subscribing and publishing topics, service calls, getting

2021-08-24 09:03:26 -0500 commented answer ROS communication

I wouldn't recommend using ROS1 on Windows. Take a look at rosbridge_suite it's designed to solve your problem.

2021-08-24 08:53:25 -0500 received badge  Rapid Responder (source)
2021-08-24 08:53:25 -0500 answered a question ROS connection to Siemens PLC

You can use the interfaces available in ROS/ on the PLC. Modbus is a good option for your usecase. I had a similar setup

2021-08-03 09:12:17 -0500 commented question Point Cloud Collision Detection (PCL, FCL)

extract the objects from PCL, and add them in your scene, then add collision check between objects (default there is onl

2021-08-03 09:02:57 -0500 commented question Reflective surfaces

This is not ROS related. there are filters in openCV that can improve result, but lighting/polarization will do more.

2021-08-02 04:52:25 -0500 commented question in this project should i use Arduino or raspberry

This question is not really ROS related, and itcompletely depends on the functionality of the Arduino/RaspberryPI. As yo

2021-06-29 10:48:18 -0500 received badge  Nice Answer (source)
2021-06-10 08:31:50 -0500 commented question Use ROS2 Dashing with Ubuntu 20.04

Yes is possible using Docker or building from source.

2021-05-31 04:22:01 -0500 commented answer How to decrease the speed of my robot?

Updated my answer to be more generic. as @lorepieri commented.

2021-05-31 04:21:23 -0500 edited answer How to decrease the speed of my robot?

in case of computeCartesianPath(..) there is no support for scaling velocities/accelerations. You can control the speed

2021-05-27 06:44:44 -0500 received badge  Nice Answer (source)
2021-05-20 07:08:42 -0500 marked best answer Which ROS controller to achieve 'teachmode'?

Hi I'm using ROS Kinetic to control the Elfin 6 DOF robot arm, and am looking into the options to achieve 'teachmode' with ROS. With 'teachmode' I mean this , also known as: freedrive, backdrive, compliance, zero-force.

Which ROS controller?

It's not clear to me which controller is suitable (or that I need to write a controller from scratch myself), I couldn't find any code examples how teachmode can be achieved. I found the following control options, but it's not clear how to use them for teachmode, and which one is suited:

Implementation

the robot I use (Elfin) has torque sensors in each joint, and I can read the effort of all joints on /joint_states. It also comes with different hardwareinterfaces I started by implementing a gravity compensation controller in gazebo,based on this. This is implemented, but needs commands to move. do I need to use the joint effort to calculate joint position/effort/velocity commands?

I hope someone can clearify the different ros controllers, and how to achieve teachmode. If there are any relevant topics/github please let me know :).

2021-05-20 04:47:09 -0500 commented question Enabling gripper force using MoveIT (python) for franka panda

What gripper are you using? In reality grasping force depends on the output (or setpoint) of your gripper. Do you really

2021-05-20 04:34:07 -0500 answered a question Which ROS controller to achieve 'teachmode'?

I solved by using a PID controller with <hardware_interface::effortjointinterface> where all PID values are 0. I

2021-05-11 08:44:58 -0500 commented answer How to translate a pose in rospy?

Thanks for your question & answer, I'm trying to solve the same problem. what is your 'required_position' ? a fram

2021-05-11 08:44:44 -0500 commented answer How to translate a pose in rospy?

Thanks for your question & answer, I'm trying to solve the same problem. what is your ' required_position' ? a frame

2021-05-04 01:31:08 -0500 received badge  Famous Question (source)
2021-04-23 09:24:49 -0500 commented question Raspberry Autonomous Car

you want your car/robot(harware) to do something on a command, you need a hardware interface for this. If there is no ro

2021-04-23 09:08:32 -0500 commented question how to make end effector look at object?

to move the robot to a point in front of the object you can do object.position.x-offset & object.position.y-offset.

2021-04-15 04:44:28 -0500 received badge  Rapid Responder (source)
2021-04-15 04:44:28 -0500 answered a question How to decrease the speed of my robot?

in case of computeCartesianPath(..) there is no support for scaling velocities/accelerations. You can control the speed

2021-04-15 02:38:12 -0500 commented question How to subscribe custom ROS topic using python(no ros packet, just one single python file)?

I agree, it wouldn't be a good idea, but it's the answer to your question, it will work. If you want a nice solution the