Questions tagged [rotary-encoder]

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Punch Hole Exactly in Center of Acrylic [migrated]

I am designing my own optical rotary encoder with a non-standard number of encoder positions for a specialty application. I have gotten to a sheet of transparent acrylic with the pattern printed on it ...
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1answer
117 views

How to tune this PID loop

I have a DC motor that is controlled by an FPGA and a L298N motor driver board. The FPGA generates a PWM signal based on feedback from a dual channel quadrature rotary encoder (1000ppr per channel). I ...
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32 views

Rotary encoders for automotive display

I'm looking into designing a display to show and adjust brake bias. I'm planning to use a rotary encoder in order to select through menus. Unfortunately, I'm having a hard time deciding which model ...
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1answer
29 views

Is there a workaround for a Hall effect encoder out of alignment with its sensors on a small motor?

I'm working with two budget SmartArduino 9V 25mm motors on a radio control tank project. Motor-A has a problem in that the encoder wheel is situated laterally above the Hall sensors. Motor-A does not ...
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110 views

PID Control with DC motor and encoder (FPGA)

This is a follow up from a previous question I posted. I have made some changes from advice but still have problems. I have developed a processing core on an FPGA that can execute some instructions to ...
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3answers
164 views

Need advice with PID loop on hardware

This is my first time using a PID control loop so I have a lot to learn. I will explain what I am trying to do before I ask any questions. I have an FPGA running a processing core that I made myself, ...
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1answer
23 views

How to practically measure the resolution (PPR) of incremental rotary encoder?

I have an incremental rotary encoder that I can't determine its model number thus I can't get its data sheet, How can I measure its resolution manually?
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1answer
82 views

Help developing rpm calculation from encoder pulses

I have having a bit of difficulty calculating rpm of a motor using feedback from an encoder. The encoder datasheet is attached here: Encoder datasheet. The encoder has two channels at 1000 PPR, so ...
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3answers
131 views

Is an opto-coupler fast enough for this application?

I am counting the pulse edges from a quadrature encoder with an FPGA and using opto-couplers as the encoder is powered with 12V and the FPGA inputs are 3.3V. The encoder is 1000ppr with 2 channels and ...
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1answer
84 views

Encoder PPR Required Resolution

This question leads on from a question I asked last night, so some people will know it. I am using an FPGA with a 1000 ppr rotary quadrature encoder counting 4x (counting all edges is 4000ppr) and had ...
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51 views

magnetic rotary encoder 0.3V output voltage

I have a 24V DC motor with a magnetic rotary encoder. The encoder has a 5V supply voltage. The datasheet states that it has an output voltage of 300-700mV. I have also measured it, and it gives around ...
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59 views

Connecting multiple encoders in to STM32 TIMx hardware counter (using channels 3+4)

I have a requirement to connect 3+ standard rotary encoders (A/B quadrature) into an STM32 - the STM32L072x is the current choice. While I could bit-bang it, it would be nice if I can just use the ...
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82 views

How to use a Hall effect sensor in a rotary encoder?

I'm designing my own rotary encoder using magnets and a Hall-effect sensor. I'm not getting the linear output I was hoping for. I'm using two magnets and putting the sensor in the middle - like this: <...
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79 views

Do rotary encoders really have no bounce?

I've always needed to add debouncing code, when handling switch inputs on microcontrollers. While I've only used three different types of switch, they all needed debouncing. My (two) rotary encoders ...