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Questions tagged [encoder]

An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed, secrecy, security or compressions

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How to read position sensor values more accurately for stpper control?

I am using Feather M4 express development board with DC Motor + Stepper FeatherWing and Ethernet FeatherWing stacked on it. The idea is to read the target position from the UDP from 0 t0 360 degrees ...
dreamcoder's user avatar
0 votes
1 answer
54 views

ATMEGA2560-16AU PWM control using AVR-C

I'm working on a microcontroller board that also features a couple of motor drivers which can be controlled using PWM signals. I also intend to precisely control the positioning of the motors using ...
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PCB trace width for high current motor driver

This post is a continuation of Trace width for PCB motor driver board, with a few follow-ups and questions. Firstly, I'd like to mention again that the motors I want to use have a maximum current of 7 ...
hdaniu's user avatar
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0 votes
1 answer
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Trace width for PCB motor driver board

This is my first time working on a PCB microcontroller board. I'm working on a project that involves the control of several DC motors with encoders, and I've opted to make my own microcontroller board ...
hdaniu's user avatar
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1 vote
0 answers
22 views

RKJXT1F42001 Logic diagram

I'm looking into integrating an RKJXT1F42001 4-directional stick switch with encoder and center push function into a keyboard I am designing, but a little confused about the diagram. I want to make ...
printsmith3d's user avatar
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33 views

EnDAT encoder resolution issues

I am working with an old motor with EnDAT encoder, no documents are available. The protocol is implemented on FPGA and can be changed, as needed. Somehow the encoder sends 13 bits. Other servo drive ...
TQQQ's user avatar
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3 answers
92 views

Why is my encoder showing abnormal spikes on the oscilloscope readings? Any suggestions on what might be causing it?

So to summarize, I have these winch drives that I've put together. One of them went berserk during testing and now I'm diagnosing the problem. I have attached an oscilloscope to where the KEB servo ...
Brandon Ringfield's user avatar
2 votes
1 answer
120 views

Beginner question regarding voltage divider for microcontroller

I am a beginner concerning electronics and would love to learn something new. I have a Teensy 4.1 and would like to calculate an encoder's speed. The encoder is built in into a system which supplies ...
homecockpits's user avatar
1 vote
1 answer
43 views

Locking BLDC motor rotor for encoder zeroing calibration

I know the title of this post is a real tong twister but my brain is in much worse condition as far as what's goin on here. Basically I have a motor that I'm installing an encoder onto so it can be ...
Dave2022's user avatar
1 vote
2 answers
75 views

8b/10b encoding disparity bit

Looking through the Wikipedia page on 8b/10b encoding, it lists a series of values for disparity bits of both -1 and +1. I have designed what I believe to be a working encoder, but what exactly is a ...
lemon's user avatar
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0 answers
24 views

BLDC motor phase sensor

I've been working on a 4 wheel differential drive robot. It has 4 brushless motors attached to gearboxes, driven by RC ESCs. I have some of these Hobbywing RPM sensors attached to two wires of each ...
Matt Williamson's user avatar
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2 answers
76 views

Help to find an equivalent for encoder H9730 - 1926 (HEDS-9730)

I need help to identify the encoder from the photo. Seems H9730 is actually HEDS-9730 but I have no idea what the second number is (1926). I guess the resolution? I saw that even on heads there are ...
David's user avatar
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1 answer
56 views

Interrupted SSI clock sequence

I measured the following clock and data sequence (time axis is in microseconds) between a Beckhoff KL5001 encoder module and a 19-bit SSI encoder. Apparently the clock is interrupted 3 times before ...
Christian K.'s user avatar
1 vote
1 answer
68 views

Should I maintain any minimum distance between two hall encoders of two motors?

I am a beginner and am trying to build an autonomous mobile robot. I want to use two DC motors with Hall-effect encoders. The image shows the position of the two DC motors. Do I need to maintain any ...
Msr09's user avatar
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1 answer
171 views

STM32 timer shared input Pin (Encoder & PWM input modes)

Can I share the pin (PA0) between timers TIM2 & TIM5 (GPTIMs)? Timers 2 and 5 can both use PA0 as an input, conveniently on ch1. Is there any issue with configuring both of them to use PA0 as ch1 ...
L Selter's user avatar
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4 votes
3 answers
555 views

Downside/tradeoffs to clamping signals with zener diodes

I have a signal source that sends fast pulsing square waves in the MHz range (encoder pulses from a motor) down a long transmission line to a receiver. I have tried many solutions and different types ...
petemoss0's user avatar
0 votes
1 answer
143 views

How to dampen/reduce oscillations from crosstalk in encoder signals

I have two encoders that emit A/B signals for a total of 4 wires. Not sure if this will be relevant but these encoders are not the same and have different output impedances and rise/fall time. I also ...
petemoss0's user avatar
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0 answers
47 views

Matching ADC and encoder data in time

I'm trying to measure load and elongation in homebrew testing machine. The load is measured by the AD7791 ADC and elongation is measured by linear incremental encoder (quadrature encoder + MCU ...
Tolik4's user avatar
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1 answer
133 views

DIY Quadrature Encoder? [closed]

Really struggling with making encoders work in my leonardo board, i could probably go the 20 ppr encoder way but i need it to be optical and not electrical/mechanical. I was thinking about using 2 IR ...
tote46's user avatar
  • 9
0 votes
1 answer
80 views

Encoder signal reading Arduino

I have a quadrature encoder both connected to the Interrupt pins on my arduino. I want to read the encoder values in the range of 0-255 with increment in the clockwise direction and decrement in the ...
dreamcoder's user avatar
0 votes
1 answer
104 views

Peaks on absolute rotary encoder values graph

I have a rotary encoder AEAT-9922, which is connected using SSI2 mode. The read format is defined on the 16th page of the datasheet. Encoder is connected to the STM32F373 microcontroller, which runs ...
Andrii's user avatar
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4 votes
1 answer
273 views

What is the term for a code that has duplicate or redundant/equivalent symbols?

I'm having a hard time performing a literature search because I can't find the right search terms. I'm looking for what you name a code over some alphabet that treats multiple symbols equivalently. E....
user1816847's user avatar
0 votes
0 answers
71 views

DC motor set to 0.25 RPM pulling -5 Amps at nearly 20% torque - Why the heck is it doing this?

Drive controlling the motor: PowerFlex DC Drive, 460 VAC, 3 PH, 27 Amps, 15 HP/11 kW, Regen, IP20, NEMA/UL Type Open, No HIM (Blank Plate), User Manual, No Communication Module, A Frame Motor in ...
Cyange's user avatar
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0 votes
0 answers
97 views

Trouble to receive data from RS485 encoder in TM4C1294

I am trying to read data from an absolute RS485 encoder Single turn "eCoder-20S". The controller is EK-TM4C1294 launchpad. I am using SN75716AP for converting RS485 to UART conversion. The ...
Muzammil Ibrahim's user avatar
0 votes
1 answer
294 views

RS-170 and SMPTE 170M Encoder

I have been searching for a Video Encoder (DAC) that can output composite signals that are EIA-170/RS-170 and SMPTE 170M standard compliant. I might not be understanding these standards correctly but ...
miggyEE's user avatar
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0 votes
0 answers
75 views

Over voltage protection for 5v differential line

I am working on a stepper motor driver that will use 48V as a power source, this driver will have encoder interface. The encoder has 3 differential lines which will only tolerate 5V. I want to protect ...
Muhammad Nour's user avatar
0 votes
3 answers
84 views

Which waveform leads the other: A or B?

If you only look at the waveforms A and B below, can you determine which one leads or lags the other? One person argues that A leads B because the first rising edge of A occurs before the first ...
internet's user avatar
  • 698
7 votes
3 answers
2k views

Can I use a motor as a rotary encoder?

Let me preface this by saying that I'm not an expert, nor do I conclusively understand how op-amps work, but I have a strong suspicion that this should be possible, at least crudely. I have this idea ...
Isaac Walters's user avatar
0 votes
0 answers
166 views

Preventing servo motor and drive ground loops in shielding

I have an XYZ CNC machine that has an electrical panel with industrial servo drives. I recently had an EMI problem on the encoder cable for one of the motors, and tried to diagnose the problem. The ...
mosfeta's user avatar
  • 25
1 vote
2 answers
113 views

Resistor for open-collector transistor

I have an encoder; the circuit is in the image below: The one that I’m interested in is the PNP one. I want to use a 0-5 V digital voltage, the datasheet says this: Applied voltage: 30 VDC max. ...
Sergio Piccione's user avatar
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0 answers
91 views

24VAC Binary Encoder / Decoder for Sprinkler System

I have a typical sprinkler system that runs on 24VAC. My sprinkler controller is in my garage and my sprinkler valves are across the yard with a cable running underground with 5 wires. One wire is the ...
Chet's user avatar
  • 111
0 votes
0 answers
49 views

The interaction between the encoder and the servo Arduino Uno

Why when the turn occurs in the + direction, it is also read -. Assignment: reading of the encoder occurs with a period of 100 mc, when the encoder rotation is detected the servo also rotates by 2 ...
Vasil Petrovich's user avatar
1 vote
0 answers
74 views

Controlling several gear motors with encoders from one Arduino

I am working on a project making a robotic hand that uses several (around 20) gear motors with encoders. I'm using this dual motor driver to drive the motors. The motors are paired into ten sets of ...
Lil Mami Chula's user avatar
0 votes
0 answers
48 views

I want to get the data from my fraba encoder directly to my pc without using PLC

The Fraba Encoder which I have is OCD-EEA1B-1213-C10S-PRM Ethernet/IP encoder in which we to get the data from the encoder to show to the PC where we will not use PLC and the communication will be TCP/...
Lazlo's user avatar
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1 vote
1 answer
67 views

Measure up to 50um linear displacement with ~100nm accuracy [closed]

I am using some open loop, mechanically amplified piezoelectric (PZT) devices to make linear movements of up to 100um. PZT are well known for hysteresis characteristics thus its repeatability is not ...
Jason M's user avatar
  • 121
0 votes
1 answer
371 views

Why is my BiSS C encoder not responding to register writes?

I am trying to write some data to a RLS BiSS C encoder. I'm able to get the single cycle data, so the connection is working and my clock timing seems to be correct. However, according to my ...
tencents123's user avatar
4 votes
2 answers
543 views

How to programmatically connect/re-connect pull-up resistors?

I’m using a MT6701 magnetic absolute encoder that supports both I2C readout and quadrature pulses (ABZ). Inconveniently, the pins for the quadrature outputs A and B are the same pins for I2C’s SCL and ...
Roy Li's user avatar
  • 71
0 votes
1 answer
64 views

Problem with rotary decoder

I am designing a rotary decoder and I am facing an issue: My comparator output seems to be high always, even if I cover both LDRs or only one or none. The comparator output goes into the flip-flop ...
Johnny depp's user avatar
0 votes
0 answers
289 views

Why is STM32 (STM32H7A3ZITxQ) 12-bit ADC minimal readout around 60 instead of 0?

I'm trying to read the analog output of an MT6701 magnetic encoder, but I'm having some issues with my ADCs. The MT6701 provides an analog output where 0 - 3.3 V (I'm using 3.3 V as VDD) represents ...
Roy Li's user avatar
  • 71
2 votes
1 answer
125 views

How to deal with incorrect optical encoder waveform?

Summarize the problem: TLDR: I am having trouble reading the signals from an optical encoder to track the position of a stepper motor(I know that it’s redundant to use encoders on stepper motors. It’s ...
JNB's user avatar
  • 41
0 votes
0 answers
1k views

How to connect an EC11E rotary encoder to a microcontroller?

I'm connecting a EC11E rotary encoder to a Adafruit Feather 32u4 Bluefruit LE. The EC11 has 5 pins: 2 for the switch, and 2 for the knob. Connecting the encoder itself would be easy, but I'm having a ...
kid's user avatar
  • 101
0 votes
0 answers
142 views

How to limit Vd and Vq in FOC for 3kW , 48VAC induction motor?

I am working on developing motor controller for AC Induction Motor.Following are the specifications of the motor: Rated voltage:48VAC Rated power : 3kW Rated current :54A Poles : 4 Position feedback : ...
Pujit's user avatar
  • 21
3 votes
1 answer
960 views

How does a pull-up resistor affect an RC low pass filter? Are two resistors necessary?

I'm using a low pass filter and a Schmitt trigger buffer to filter the output of a rotary encoder. I have included the manufacturer's suggested circuit as well as my copy of it for sake of referencing ...
Alex Jegers's user avatar
1 vote
1 answer
219 views

BLDC motor for position control for brushed DC motors

I have done s SE survey of BLDC motors and figured out they are essentially stepper motors but aimed for continuous torque. Moreover they differ from brushed DC motors significantly in terms of ...
user0193's user avatar
  • 436
1 vote
1 answer
45 views

Periodic noise on peak-to-peak plot

I've encountered a strage behaviour and would like to ask for suggestions. I have a servo motor that is doing a jog movement with a fixed 250rpm. The motor drives a shaft through an epicycloidal ...
ZeitGeist's user avatar
0 votes
0 answers
263 views

Teensy read two encoders simultaneously

I am trying to read two Quadrature encoders at exactly the same time. They are 4000CPR encoders, and they will be spinning between 10 to 60 RPM. The two encoders are mechanically paired to the same ...
Marko Jurisic's user avatar
1 vote
0 answers
227 views

Manchester encoding where the initial state is low

Is this correct? I thought in Manchester encoding the 0's had to be high-low transition, even if the initial state is assumed to be low and 1's low-high.
MALLU's user avatar
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0 votes
0 answers
42 views

Could hall encoders that are attached to the DC motors affect each other or the IMUs?

I am a newbie and I want to build an autonomous mobile robot. I am planning to use 4 DC motors with hall-effect encoders. I will use 4 IMUs for localization at first. Next, I also have the plan to ...
Msr09's user avatar
  • 53
0 votes
2 answers
199 views

Connecting a Panasonic EVQ-VVD00203B radial encoder to Arduino

I purchased this Panasonic EVQ-VVD00203B radial encoder for an Arduino project, and am having difficulty figuring out out to wire everything up. This is the encoder: If I understand the schematic ...
Joshua Crisp's user avatar
1 vote
2 answers
385 views

Reading angular velocity from multiple rotary encoders

I am working on a project, where I need to get reliable data from 4 incremental rotary encoders. The motors can spin at a maximum of 100 RPM, with 420 pulses per revolution. This makes a single ...
Tony's user avatar
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