Questions tagged [servo]

A kind of motor with automatic feedback, such as a hobby RC servo.

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Unknown Component Identification

My friend and I are repurposing an old rc car. We're trying to wire up the steering, but we've never seen the type of motor that it uses for steering. It has 7 wires. What is this component and how do ...
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30 views

Driving Servo Motor with Raspberry PI 4 and ServoBlaster

I'm trying to drive this DS3225 servo motor with a Raspberry Pi 4 using the ServoBlaster software. After installing ServoBlaster, I run the following commands: ...
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37 views

How can i externally power 5 micro servos and one mg996r?

I am building a robotic arm with 5 * SG90 9g micro servos to flex each finger and one MG996R servo as an elbow joint. The servos were working inconsistently, with not enough torque and jittering a lot....
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Trinket M0 PWM ValueError: duty_cycle must be between 0 and 65535 inclusive (16 bit resolution)

I'm trying to control a servo motor from a Trinket M0. My circuitpython code is: ...
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1answer
20 views

Delta Servo Drive 220V/400V Series

ASDA-A2 Delta Servo Drives including two types: 220V and 400V series that it seems the difference is input voltage of the Servo Derive. but i doubt 220VAC or 400VAC is line to line voltage or line to ...
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49 views

Suitable motor for steering wheel angle of the self-driving car?

I am working on the self-driving car as a final year project. I want to map the steering wheel motor angles with frames captured via a camera of the track. In order to generate the dataset, I am ...
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26 views

Controlling Servo with MOSFET

I'm trying to understand how to drive a servo that needs 5V power with a 3.3V output microcontroller. If I have a 3.3V PWM signal and a 5 V power source, is there a way that I can use a single N-...
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27 views

a Variable rehostate servo Motor to discharge a Tesla S model battery

Anyone could help me to find a Variable rehostate with servo Motor to modify load on a high power system. I am trying to discharge a Tesla S model battery.
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Interfacing Problem with 16 MG996R servos

I am using 16 MG996R servo motor with PCA9685 servo driver and Arduino Uno, but the motors are not working properly.It works well a Month ago but is not working now. The servo only twich a little when ...
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67 views

Can I can control an RC servo using only a 5VDC and GND signal?

I'm working on an application where I want a servo to open and close a hatch. Because I only need the servo to operate in two positions, I'm curious if I can forgo the PWM aspect and just supply a ...
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39 views

continuous rotation of servo problem

I am making a solar tracker using MG995 servo motors. The problem I am facing is that as soon as I run the program the servo starts continuously rotating. Can someone please help me to figure it out?...
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30 views

External Power supply design for driving multiple loads using arduino uno

In my use case, I need to drive 5 servo motors (sg 90) using arduino uno. I have a power adaptor rated at 9v 1A DC which i plan to use for arduino uno. For the servo motor power supply, i have a 12V ...
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16 Servo interfacing using Arduino Uno and PCA9685

I am using 16 MG996R servo motor with PCA9685 servo driver with Arduino Uno, but the motors are not working properly. What is the best power supply/battery for my project as it worked well earlier but ...
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36 views

SEM brushed DC servo has stuck brake & disassembly help

29 in/lb servo dynamics brushed DC servo motor, brake will not release when power is applied. Motor data plate indicates 24vdc 44in/lb holding capability. Brake terminals at the motor measure 74 ...
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22 views

How can I reset/stop a PWM timer using STM32F4 board

Hi I'm working with the STM32F4 board trying to make a servomotor do two movements (one side and the other). This is my code so far: ...
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30 views

Maximum servo speed for given drive voltage and Ke

I'm attempting to use a servo as the spindle motor for my CNC mill. I need to run the servo at up to 6000 RPM and only have AC ~230V mains available to power it through a Granite Devices Argon servo ...
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32 views

how do i calculate stall torque 5.4kg@ 5v 1000mA?

i came to this website https://www.letsbuyrobots.com/en/robot-humanoide-ls-868, and i want to know the servo spec especially the stall torque, and then i found this "2) Torque:5.4kg@5v 1000mA, Power: ...
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48 views

Solar tracking using an Arduino Uno

I'm trying to design a dual axis solar tracker using an Arduino Uno-R3. Basically it just takes the input from the LDR and outputs the PWM signal to the two 9g servo motors for each axis. The ...
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1answer
58 views

How to effectively avoid current drops while stepping down the voltage?

We are using a PC power supply to power our project, which is a Robotic arm. Since our power supply has a 12V output voltage, can anyone please advise how to step down the voltage (12V) to 6V. Using ...
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22 views

RC servo suitable for robot arm or not

As you see many product and open source using RC servo to build small robot arm. This question might simple but I think it important to someone that want to build robot arm and decide which type of ...
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2answers
46 views

External vs arduino power supply for servo motors?

I recently built a project that involves the control of three SG90 servo motors. I started off by controlling this through the 5V output pin of the Arduino Uno, with the Arduino powered through the ...
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32 views

Measuring servo torque

has anyone ever attempted to measure servo torque using current? Basically if you have a robot you want to detect stall state and approximate force being applied.
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1answer
39 views

Using a capacitor to smooth momentary voltage cuts

I'm building a model of a trolleytruck (very similar to a trolleybus). The steering system works with a servo but, because the overhead wires are not perfect and there are short voltage cuts, the ...
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40 views

Requirements for using one power supply for multiple sensors [duplicate]

I am building a 4 leg robot with a Raspberry Pi and 8 servos (Amazon product page). Currently I have a a 6 V 3A power supply powering the servos through a 5V 5A buck converter and a 5V 2A power ...
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1answer
76 views

Connect servo motor to 8255

I want to control servo motor with the help of 8086 processor and thus want to connect 8255 with servo motor (with help of some motor driver) . Most of the information on internet is about stepper ...
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44 views

Test a servo without Arduino

I have a standard sm-s2309s servo that comes with the Arduino starter kit. I have used it previously, multiple times without issue. Now I'm trying it to use my servo again but am unable to get the ...
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143 views

Best way to track light source?

I want to build a 1-D (azimuth), bidirectional optical tracker. The idea is to have two identical transceiver, mounted on DC servo-motor. The user can move the two servos on rails (reasonably fast), ...
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80 views

20kg digital servo not working, probably because my frequency calculations are very wrong (raspberry pi)

summary I changed my servos for a more powerful one and cannot get it to work, I believe it is because I can't get the right duty cycle calculation in the code explanation I have a robotic arm that I ...
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1answer
34 views

servo speed control [closed]

I use towerpro sg90 servo motor for arduino I want one move forward and backward 180 degrees why does it move in one direction slower when the button is pressed ...
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1answer
56 views

Powering 10 servomotors + Arduino

I'm set on using a single Li-Po for a whole 10-servo robot, splicing the power with those Wago connectors into three step-down converters: 5V for Arduino Uno & PWM driver with 7 servos (6V would ...
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72 views

What is the best way to turn the knob on a lamp automatically?

I've been bored during quarantine and decided to build my very first circuit that wasn't school-related. I want to make my lamp remote-control, and my initial thought is that the best way to do this ...
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1answer
140 views

Help with servo and circuit board

So I've got a couple servos that I would like to hook up to an Arduino Uno. The servos come with an attached circuit board which I can't identify it's purpose. Should I try to use the circuit board? ...
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35 views

FG Servo Motor Inconsistent

Need some help with fixing up a belt drive turntable using a Frequency Generator DC motor. I have the same turntable as the person on this post, so schematic is the same: FG servo motor speed issues ...
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1answer
17 views

Access device commands on Lenze 9400 Highline driver via Twincat3

I want to access the device commands on a Lenze 9400 Highline driver via CANoverEthercat(Twincat3). Is that possible and how can I do it? Specifically, I want to access the Device command 51: Identify ...
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53 views

How to estimate the linearity of this servo from its datasheet

What parameters indicate to what extent the steps are evenly distributed over a rotation? Is there such a parameter which indicates that kind of linearity of a servo motor? --to be updated--
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1answer
27 views

How to determine the right spec of a servo motor given an inertia moment?

I'm working on a trash bin which lid is controlled (opened/closed) by a microcontroller and thus i decided to use a servo motor. The lid is 47 x 47 x 0.1 cm and because its made from steel has a ...
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50 views

Knob control (360 degree clockwise and anticlockwise) using servo motor with arduino

I am working on a project in which I have a knob on HMI which in turn has a potentiometer behind the knob. Now I want to control that knob using Arduino or any microcontroller.i have to rotate it 360 ...
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46 views

State Space model of a positional servo system. What are these parameters?

I am trying to solve a problem related to state space modelling of a positional servo system. I am stuck in the last part of the question. The full questoin is shown below: The following question ...
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51 views

Calibrating FEETECH FR5311M Digital Servo

Hey everyone, I am owning this model feetch servo motor. I want to do the following:(with arduino uno) Read the initial position(angle) of the servo motor rotate the motor to desired position(angle) ...
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1answer
35 views

Stall torque for servo

My understanding of stall torque is that it's the amount of torque produced by the servo when the output is stationary. Suppose the stall torque of a servo was 10kg-cm. It can lift the a 10kg load at ...
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1answer
61 views

+-10v input motor driver

I have a servo controller that outputs a +-10 V velocity command for a motor. How can I take this signal and turn it into a pair of PWM outputs to drive an H-bridge? A value of 0 to 10 V will ...
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3answers
79 views

How does the magnetic field in a servo motor acts according to the PWM signal?

I have read about servo motors but have problem grasping the main idea of obtaining fixed position by the magnetic field. The servo motor position is said to be controlled by PWM signal. And a toy DC ...
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1answer
40 views

How does a servo amplifier with Step/Dir Interface calculate feed-forward terms?

My Question is related only to servo systems that still use step/dir as input. Consider a typical advanced servo loop of an amplifier in the figure below: (source: "Mechatronics system Control and ...
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1answer
96 views

Servo motor too noisy [closed]

I’m currently using a Hitec HS-645MG servo to swing a piece of thick piano wire approximately 2ft long in a 180 degree arc. Servo being controlled via Arduino. It needs to swing back and forth ...
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64 views

How to power multiple Wemos D1 Mini

I’m planning on making my bay window blinds tilt automatically with Alexa. I've done plenty of research but can’t find my answers, hence the question. I have 4 individuals blinds which all need ...
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3answers
155 views

How twitchy are larger digital servo motors?

In my servo-driven pen-plotter project, I have been experimenting with various different servos to discover more about their characteristics. In practice I have found that: analog micro servo motors ...
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3answers
56 views

Range of duty cycle ms to drive RC servo motor and transfer function

I am using the ball and beam control system from Acrome robotics and I would like to identify the transfer function of the RC servo motor which translates motion to the system. First of all, I have ...
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48 views

Servo doesn't move properly

I have a problem with my servo motor. I connected a servo to the PWA connection of a PCA9685, but powered the motor externally. There's no problem with that and it works fine with some smaller servo ...
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1answer
109 views

I cannot move a servo manually

My servo is classic SG90. I connected +5V and gnd correctly to a dc power supply. Then I connected output of a signal generator which generates 0-5 V pulses at 50Hz (checked by oscilloscope). I know ...
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1answer
57 views

How can I make smaller steps with my servo?

I've got a Raspberry Pi with which I control a servo. The servo controlls the rudder in an autonomous boat I'm building. I'm using Golang and this gpio library to control the PWM. The input I get ...

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