Robotics Stack Exchange
Robotics Stack Exchange

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1500 questions
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2 answers

Lego Mindstorms EV3 gyro sensor offset fix

I am currently working on a project for a Lego Mindstorms EV3 autopilot using Matlab/Simulink. Basically, I am using a closed loop control system with a PID controller for the control of the control surfaces. I'm using Simulink to construct the…
Mason
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How to create a Industrial Robotic arm controller?

Can anyone explain me in detail, what a industrial robotic arm controller does? What are its components? Does the industry use the opensource controllers like Arduino? I saw most of industrial controllers look very big whereas the hobby robot arms…
user52705
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MPU6050: Changing Gyro Output Range Throws off Positional Reading

I am using the MPU6050 in conjunction with an Arduino and Jeff Rowberg's i2cdev library, and my project requires that the gyro rate outputs be more precise than the default setting, which is 1/16.4 of a degree (+/-2000 deg/sec range). The gyro…
Ember
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2 answers

Plastic shaft supports

I would like to prevent a shaft from being pulled through it's bearings - that is, press a plastic ring around it on either side. What are these rings called? They're not bearings or hubs. And where can I find them?
SRobertJames
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Tuning Line follower PID constants with Q-learning

I am currently working on a line follower buggy and have managed to tune the PID constants​ manually. The buggy follows the line at a moderate speed. I will now like to take things further and learn new things as well. I read about Q-learning and…
Zadiq
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1 answer

Dynamic braille interface

I'm a newbie in robotics, and I'm doing a project on dynamic Braille interface. Basically it's a 8*8 array of pins, which can be either totally up or down. How to use least motor as possible? I'm thinking of using Arduino for easy interface with…
Dzung Nguyen
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1 answer

How to check lane departure in OpenCV?

I'm using OpenCV 3 in Python 2.7 on a Raspberry Pi 3. My project's aim is to build an autonomous lane departing robot that can detect the two lanes on its sides and continuously correct itself to remain within them. I want to achieve something like…
SidharthM
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Humanoid robot arm - inverse kinematics - choose joint solutions

I have developed a 7DOF arm for a humanoid robot (see pic below for more details) I have implemented the IK using a closed form solution and of course I come up with eight solutions - each one is actually positioning the end effector at the right…
fabrice
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Why to combine a Raspberry Pi (or similar board computer) and an Arduino for controlling motors?

I am planning to build a omnidirectional holonomic robot, and checking what I should use for the hardware, I saw many people using a Raspberry to compute most stuff, which in turn calls an Arduino to control the motors. But since the Arduino will…
Emílio Dolgener Cantú
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3 answers

A sensor that can see glass/transparent objects and surfaces

I am currently thinking about making a robot that will autonomously drive around the place. The place I want this robot to drive in however contains quite a few glass walls. When mapping the area I would need to be able to see the glass. For this…
John Bow
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Creating MAVLink commands from python

I am struggling to find any clear documentation on how to create MAVlink commands using python. I am looking to create an autonomous glider and require some of the basic functions Retrieve GPS Data and store into a file Import GPS data in Python…
car12398
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5 answers

What is the difference between 4-point and 8-point connectivity in graph based planning?

In graph-based planning (say, A*), states are connected to their neighbors. How should one decide whether to connect to the 4 neighbors or the 8 neighbors? What are the pros and cons of each approach?
Felix
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Balance Bot PID tuning

so I am working on a Self Balancing Bot with Arduino Mega. I'm using 12V 200 RPM motors with built in 840 PPR quadrature encoders. The torque rating is as follows: Rated Torque: 2.4 Kg-cm Stall Torque: 6 Kg-cm As of now I've implemented a simple PID…
user87877
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3 answers

Torque in kg/cm?

I was looking up the motor parameters for some stepper motor where they listed the torque of the motor at different current/voltage but the torque they listed was in kg/cm. How is kg/cm even a remotely acceptable unit for torque? How do I calculate…
Naresh
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Transforming Point Cloud to get Top Down Image

My task: I have a task where I am asked to track parcels(carton boxes) of different dimensions moving on a conveyor. I am using Asus Xtion pro camera mounted on top of a conveyor in any inclined angle. I am looking for a model free object tracker…
Fracedo
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