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

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23 views

Power Supply for 6 servo and arduino

Hey Guys , I have 6 servos being controlled by arduino mega 2560 and I need to power them all. But I am struggling to decide my power supply components. I have one power adapter which provides 8v ...
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1answer
24 views

RC Servo Safety

I've been working with a couple of RC Servos lately and I had to ask this. Is it safe to rotate the servo manually with hand when it is powered off. The servos are made up of metal gear trains and ...
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2answers
43 views

Servo - PWM Resolution

I'm trying to create a servo drive function on an ATMEL microcontroller without using the built in PWM functions. Basically just with the ISR timer. My question is... what is the general resolution ...
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3answers
59 views

How to measure servo potentiometer

What's a reliable method of getting a clean measurement of the potentiometer in a hobby servo? I've modified a servo for directly polling its position by soldering a wire onto its potentiometer's ...
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21 views

5V servo motor temperature rated to 90C [closed]

I am using a Hitec HS-625 servo motor to actuate a throttle of an engine. The servo is located in a hot part of the engine compartment and thus has burnt out when it spent time above 60C. I am ...
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1answer
30 views

Are there double sided servos?

I see servos a lot on robots that seem to be connected from both ends. Are there servos where the shaft are on both ends of the servo?
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16 views

Reusing 10B0264 stepper from Lexmark C760

Good day. So I disassembled my old Lexmark C760 laser printer and I found few steppers inside. Part number written in title. It seems this stepper has driver allready assembled with it. There is a ...
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2answers
39 views

Using a Servo motor as load on a system

Can a Servo motor (or any electric motor) be used as a load on a system ? meaning can it reprisent for example a certain dead weight ? In the picture below you can see a motor driving 3 gears, to ...
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2answers
55 views

Stopping a servo before it reaches final position?

I'm having trouble coming up with a solution for a project. Currently, there is a servo-motor actuating a robotic finger. The position of the servo determines the curl in the finger (straight finger ...
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2answers
47 views

12V vs 5V servo

I am looking to actuate a throttle on an internal combustion engine. I am using a 5V servo driven by an Arduino Mega2560 at the moment. The throttle is very close to the engines alternator and there ...
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1answer
51 views

Controlling servo: how to determine the angle and needed pulse-width?

I'm kind of new when it comes to using servo's with an Raspberry Pi. Although I do have some experience, I'd like to understand things a bit better. Therefore I would like to share some questions with ...
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31 views

Secret knock detector using arduino

I am very new to anything tech related. I am trying to help my son with a project. We have built the secret knock detector following the schematics from insructables.com. we copied the code into the ...
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83 views

Why does my Arduino freezes when i turn a servo [migrated]

I have a Servo Motor and an Arduino Uno. I used the Arduino to run a servo motor. The code was very simple. It was to just Turn it 90 Deg Anti-Clockwise when a switch is pressed and Turn back to its ...
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2answers
110 views

powering multiple servos from 12v controlled by arduino

I am trying to control 8 servo's with an arduino uno using ROS. The diagram below shows my current configuration to power the ...
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1answer
33 views

How to control multiple servo motors using two timers?

How can I control several servo motors using 2 timers in an ATmega16? I have searched for "servo bit banging" but no coherent post explains it fully. I found some code but I don't thoroughly ...
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2answers
143 views

Modifying a thermostatic radiator valve for micro control

The photo below shows a electrical thermostat controller. The upper part is the motor with a gear. The motor has two wires attached. A red and a black one for the current. What this component does ...
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1answer
37 views

Controlling a servo with Attiny85 OCR1B

I currently have a project where I need to control a servo using OCR1B. I already figured out how to use one with Timer0, but I can't use that for this project though. So, my questions are: - How ...
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51 views

Nyquist criterion and the gain/phase margin of transfer function?

Now to determine gain/phase margin I need the bode plot. and to find the value of k such that the system is stable I have to do Nyquist criterion for the closed loop transfer function. (Question: ...
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1answer
40 views

Determine unhampered natural frequency and motor constants from graph?

I can find zeta from the PO given in the graph but I don't know any rule relate wn with tp and I don't have value of the of ts and tr For part b and c I don't know where to start please help me ...
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2answers
93 views

Connecting servo to Arduino over long distance - Servo not working anymore

Recently I bought a couple of Makeblock's large servo's. I am not really familiar with Makeblock's products, I am a big fan of Arduino's and Raspberry's. But I have not used these servo's ...
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1answer
40 views

Unusual servo reaction

I'm using DIY pwm-generator based on attiny13 to control servo. Pulse cycle is 37 Hz, pulse width is ~540us - ~2400us. Servo rotates correctly but on stationary positions it's vibrates (gears try to ...
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2answers
43 views

Driving servo with the help of microcontroller

I'm making a driver board for servo TowerPro MG946R based on ATtiny13. PWM parameters have been taken from manuals: signal period ~13 ms, pulse width ~540us - ~2400us (checked on oscilloscope), but ...
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2answers
65 views

Why use decoupling capacitor with Servo S2309S and how does it work?

I read the following statements in Arduino Projects Book, explaining about the use of decoupling capacitor in a circuit connected to a servo. When a servo motor starts to move, it draws more ...
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72 views

Question about contolling a SG-90 servo motor with PWM using Atmega 2560

I want to get a SG- 90 (Tower) servo motor to move from zero deg to 180 deg using the ATMEGA 2560 in the Arduino environment. No Arduino code is allowed,only C. So far the motor rotates from 30deg to ...
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2answers
73 views

How to supply one or more servo motors from a PC power supply?

I have a PC power suply 800w. The 12V output has max 20A. How can I convert the 12V to 6V and 10A (when 5 servos will work in the same time)?
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4answers
889 views

How to achieve very accurate/fine rotation with motor

I am running an experiment where I need to rotate a lightweight dial (<5 grams, so very low torque requirement, and fairly slowly), but need to do very accurate, fine steps of 0.03 degrees. ...
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66 views

Weird behaviour of DC servo motor controlled by arduino

Ok, so I have a dc servo motor powered at +-24 V and I am trying to control it with an arduino. I have an intermediate circuit on a PCB where I do the necessary voltage transformations in order to ...
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110 views

How to control a continous rotation servo using pca9685 and python

Servo Name: Tower Pro MG995 I am using python to rotate the servo using PCA9685 and Raspberry Pi Model B+. This is code I am using right now. ...
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3answers
48 views

Isolating or suppressing possible servo noise from signal lines

I will be building a circuit to control a robot arm which is not a small toy kit. There will be motion sensors, feedback systems, robot arm controlling modules. So digital signals will be flying all ...
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2answers
71 views

Problem Running Multiple Servos - AVR

I am making a simple robotic arm with atmega8 using two servos(two joints), I am using Software PWM of AVR and it is working damn perfectly for one servo. Then i attach another servo and both does ...
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1answer
110 views

Why are servo motors geting weaker in a few minutes?

What I am experianceing is very weird but I will try to explane it as best as I can. I have a simple robot arm with 4 Degrees Of Freedom (DOF). This is not a robotics problem but thought it would be ...
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1answer
61 views

What do you call servo connectors?

What do you call the outlets/plugs/connectors that you plug servos into on a board? These things circled in the photo... I'm trying to purchase these and have no idea how to find them.
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2answers
50 views

What are the differences between these PWM controllers, specifically related to driving servos?

Adafruit has breakouts for 2 different PWM driver: SPI 24 channel driver based on TLC5947 I2C 16 channel driver based on PCA9685 The specific differences I'm interested in are the ones that would ...
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80 views

Servo motor horizontal steering movement

I wanted to replace existing DC motor - Spring based steering system of an RC car with a servo motor. The existing setup is shown in the image attached. I need to know what would be best method to ...
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1answer
54 views

Servo Motor set up

I want a servo motor to move/rotate a set distance and hold position (bear weight:which for my uses would be minimal) and then when power isn't applied/cut-off it drives back to original position. I'm ...
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2answers
44 views

Servo does not rotate to the absolute minimum position

I did a bit of Googlin' but I couldn't find anything about this. My hexapod uses analog servos (these ones) to move the legs around. I have the control line hooked up to a servo controller (which ...
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1answer
102 views

reduce from 12 to 7.5 volts and can carry 4 ampere

i have 2 servos operating at 7.5 which each of them consume 4 ampere at stall and i have battery 12 volts.i want to make a circuit, buy a circuit or even know if it i possible to make or buy ...
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2answers
208 views

Using a microcontroller+BLE (Bluetooth Low Energy) +Servo with one battery source

I am currently working on a project where I was looking for a microcontroller that is capable of BLE (Bluetooth Low Energy) which determines a servo's position. Using an Arduino the project works well ...
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1answer
130 views

Six Wire Servo with Arduino

I have a Tamagawa 200 step servo, 6.4V. I want to test it with my Arduino Uno. My only problem is that it has 6 wires (white, red, black, green, blue and yellow) and I can not find a simple way to ...
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1answer
27 views

Raspi Audio Problems When Using a Servo

So I am trying to make a raspberry pi control a servo but it also needs to have speakers attached. But whenever the servo is powered there is a horrible audio output through the speakers. This will ...
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1answer
61 views

Best way to simultaneously control two servos positioned horizontally and vertically?

I'm trying to set up a C program where a servo (servo1) sweeps to a position, waits a few seconds, moves to another position and repeats 4 more times. Another servo, positioned vertically, (servo2) is ...
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68 views

Controlling a servo motor on an LPC2103 microcontroller

I'm still a beginner on deep embedded systems development. I would like to know how to control a servo motor without using PWM, since I didn't actually learn anything about it on my classes and I'm ...
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0answers
42 views

AC servo motor PR position control mode

I have a delta A2 servo motor datasheet and I want to ask about the PR control mode, I know that there is some parameters related to the control of such mode (P6-00 ~ P7-xx) but how to command the ...
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1answer
166 views

Powering a Futaba S3003 servo

I'm working on a project and I need to use a Futaba S3003 servo, I'm about to buy a transformer that gives 6v, the thing I'm not sure about is the amperage. Is this transformer ok? I can choose 3V, ...
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2answers
57 views

24 VAC source unable to drive servo motor

Here's my power supply (schematic except without the transformer since my source is already at 24 V AC and using a 100 uF electrolytic as my smoothing capacitor): 24 VAC rectifier -> 100 uF smoothing ...
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2answers
840 views

Using a capacitor to properly power a servo

I recently attached a servo to my Arduino for the first time. I ended up needing a 470uF capacitor wired like this tutorial shows because my servo was freaking out and causing my laptop to throw ...
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1answer
100 views

Multimeter showing negative voltage on servo connection

I am trying too get my first (ever) servo sweeping back and forth and for some reason am having enormous difficulty with the wiring. In the Fritzing pic below, I have the circuit connected (both + ...
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1answer
56 views

How to bypass S-type connector for connecting a servo to an MCU/SoC

I have a TowerPro SG920 servo that I'd like to connect to an MCU/SoC (Pi or Arduino). However, the servo has an "S-type" connector (see pic above) and its 3 wires (red, black and orange) are ...
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1answer
50 views

How to determine servo signal encoding

I have a TowerPro SG90 servo which matches the "JR" brand wiring discussed here where the servo's 3 wires are as follows: Red is + Black is ...
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2answers
371 views

Sharing same battery with two dc motors and two servos

I have a 12v battery powering two DC motors through an Arduino and motor controller. The 12v battery is also powering the Arduino using the VIN pin. Now I am trying to hook up two servo motors from ...