Questions tagged [quadrature-encoder]

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18 views

Roboclaw node on ROS error: “Encoders None None”. Encoders can't be read properly. What might the cause be?

My two wheels robot was working properly with ROS Roboclaw node before changing a burnt Motor. After changing this motor with a similar motor, I reconfigured it as usual without touching the node or ...
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1answer
32 views

Minimum distance for a shaft coupling

What is the minimum shaft distance required to do a shaft coupling. I want to mount encoders on my motors but the shaft length is only 15 mm long. My encoders are 12 mm wide. So, I only have 3 mm to ...
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2answers
27 views

Motor encoders randomly start counting backward, then go back to normal

I am making an Arduino-controlled differential drive robot, and I am having the following problems: the encoders built into the motors are being used for measuring the rotary displacement, and while ...
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1answer
72 views

Roomba 500 Series - Raw encoder counts readings

I have been trying to read Roomba raw encoder counts I am receiving values, but I have a sudden increase/decrease in values as can be seen over here. 142 152 153 166 167 180 181 196 50101 ...
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0answers
22 views

How to mount encoder without rear shaft?

I am interested in this robot chasis: 4 wheel robot chasis There is no information on how to install encoders although the manual says it has space for encoders. The page says that the motors do ...
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1answer
309 views

Encoder for odometry (Wheel vs motor)

Hey i am building a ROS enabled robot which relies on Odometry data from encoders for the purpose of SLAM . I am confused between what would be more accurate in estimating the pose and robot ...
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2answers
191 views

What is the difference between speed encoders and esc

I understand that motors come with recommended speed controllers, be it encoders or esc. But what is the difference between the two?
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1answer
187 views

How can reading a quadrature encoder fail?

I am trying to the read the quadrature encoder on a ServoCity 624 RPM Premium Planetary Gear Motor w/Encoder with a SparkFun ESP32 Thing. I am supposed to see 228 counts per revolution, but I see 230-...
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1answer
429 views

RobotC Code Malfuncion (VEX Robotics Clawbot)

I have a standard VEX Clawbot, which I've been trying to make go straight for some time. I've been following this guide: http://www.education.rec.ri.cmu.edu/products/cortex_video_trainer/lesson/3-...
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2answers
2k views

Quadrature encoder signal from dc motor is very noisy

I'm starting out with robotics, got my first DC gear motor with quadrature encoder (https://www.pololu.com/product/2824): I ultimately plan to hook it up to a motor driver connected to a Tiva ...
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2answers
2k views

Why can't you buy continuous servos with absolute positioning?

I've been looking at parts for a beginners robotics kit (I teach at a museum) and have been wondering about servos. You can buy continuous servos with relative position encoders. But I can't find ...
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1answer
972 views

How to calculate the real time RPM of motor with rotary encoder?

I want to measure the real time RPM of the wheels. I think incremental rotary encoder would be good. But i am confused on how to interface it with DC brushless geared motors. From the images i am not ...
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1answer
668 views

Kalman Filter with incremental encoder + optical mice

Currently I am building a robots with 2 incremental encoders with a optical mice sensor. The reason to install a optical mice sensor is to provide better feedback when slippage happen on the encoders. ...
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2answers
370 views

Which encoder should I use with a 24V Dc motor and 6mm shaft?

I would like to control the position and velocity of a DC motor like this one (ZY MY 1016 - 24V - 10A - 200W). The motor comes with a 13 TOOTH SPROCKET and the diameter of the shaft is 6mm. It's not ...
4
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1answer
215 views

Quadrature Encoder Counts

Actually , I have been since two weeks looking for convinced and final solution for my problem , actually I am completely lost , I am working on mobile robot (Rover 5) with 2 motors , 2 encoders . the ...
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1answer
652 views

Counts of Quadrature Encoder

Simply, I had Rover 5 with 2 DC motors and 2 quadrature encoders, I just want to use encoders to measure the distance of travelling for each wheel. To start with, I just want to determine the total ...
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2answers
880 views

translation the shaft encoder data

I am designing a robot in real world and i want to plot everything in X,Y (Cartesian) coordinates I just want to use the encoders of wheels to determine the current position of mobile robot and its ...
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2answers
812 views

DC motor with encoder

Can anyone help me out here with this DC motor, especially the encoder part? I tried searching around for its datasheet but its as short as 1 page and the only spec I get are: Encoder: 1 pulse/...