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

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1answer
58 views

how to design power for arduino and servo

I'm designing a system where an arduino (3.3v) will run continuously, and occasionally turn a MG996R servo - this servo is pretty strong and can draw more than 2 amps. The servo runs fine off 4 AA ...
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2answers
43 views

How to provide external power supply for 8 servo motors?

When ever I switch on the power supply there is not enough power supply to servo motors. Voltage across each servo motor is 1.5 Volts only. Should the circuit must be changed? Is there any better ...
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3answers
50 views

Powering Raspberry Pi and servo motors from a single power adapter

I want to use a single power supply for a Raspberry Pi and 2 servo motors. The servo motors require 6V for operation and their cumulative current consumption does not exceed 1A. The Raspberry Pi runs ...
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1answer
34 views

Servo control with 555 timer

first of all this is for an assignment so I have certain limitations, mainly cost. The problem I'm having is I have run out of PWM inputs on my ATtiny45 but I still want to drive a servo. The two PWM ...
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0answers
32 views

What type of motor is it that I am after?

I would like to actuate a linkage using a motor from one end. Meanwhile, this linkage can be manually actuated from the other end. I would like to use a 12V motor which I can use to actuate the ...
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1answer
45 views

How to use two timers simultaneously to control 2 servo motors

im very new to PIC. Im trying to control 2 servo motors for the wheel of my robot. Im using PIC16f877A MCU, servo motor and 4 mhz crystal oscillator. I use mikroC compiler. Actually i already have a ...
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0answers
30 views

Designing a system to move a marble on a rotating beam from point A to point B using a servo

I need to figure out how to design a system to move a marble on rest at point A to point B at rest. See my drawing below for what I'm trying to accomplish: I have an Arduino I could use as a ...
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0answers
22 views

ESP8266 servo controler

I am building a small application, that should be able to connect over wifi to server, pull some data and turn a connected servo accord the result. The system should be powered on battery. Is this ...
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0answers
39 views

Why does a servo motor reset to a different neutral position occasionally?

I have a servo motor that I am trying to control with an arduino board. Its pulse width range is from 900-2100 us with a midpoint at 1500us. It has a range of motion of 180 degrees. Occasionally when ...
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3answers
83 views

Servo control using dsPIC33's Output Compare and Timers

I am trying to control a single servo using output compare and a couple of timers. Timer 2 provides the 20ms period and it controls output compare 1 (OC1). OC1 is running in continuous pulse mode, ...
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2answers
72 views

Some question on SERVO MOTOR [closed]

Basically we give a PWM wave to the control input, but what will be the input for the error detector...? How is this PWM wave converted to some voltage value that can be compared from the ...
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1answer
68 views

How to control the speed of rotation of a servo using a potentiometer?

I'm trying to write a program using BASIC to turn a servo 180 degrees back and forth, and to use a potentiometer to control the speed at which the servo turns. I have a code, but when I run it, the ...
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2answers
46 views

How to specify a “standard”, not CR, servo

What do you name a servo that rotates to a specific angle and stops there, to differentiate it from a continuous rotation servo, a linear servo, or any of the other varieties? I've seen them ...
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0answers
39 views

Tower SG90 Servomotor Current Draw

I'm planning to connect to the TowerPro SG90 micro servomotor to a development board, with VCC = VSYS, in the manual it's specified that this VSYS provides 5V to power any digital device and max ...
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0answers
66 views

Why did the capacitor in my servo explode?

I recently ordered a High Speed Continuous Rotation Servo from Parallax. Excited to see how fast the little guy would spin, I searched my home for a power supply. The limit in the datasheet was listed ...
0
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1answer
58 views

How to pick a stepper motor

I'm building something that I want to control from mcus, and while I'm fine with the MCU part, I'm in the dark about motors and want to avoid buying too many of the wrong ones while I figure it out. ...
0
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1answer
47 views

What type of motor is more desirable, if the requirement is to rotate a load with high torque by about 30-60 degrees?

Torque required is about 17Nm. The speed for rotation is very small about 10degrees/sec. The load is dynamic and I do not want to apply any torque more then 20Nm, this I want to achieve by using a ...
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1answer
96 views

Calibrating Servo Motor

I am working on a project on image tracking on MATLAB, by moving the mounted camera on a servo motor controlled by the Arduino Uno board, the data is serially sent to the arduino using USB according ...
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1answer
84 views

Will this servo stall detection circuit damage an Arduino?

I am part of a group building a project for school that involves a servo. We made a circuit for our Arduino to detect when the servo is under heavy load / stalling. The circuit we built detects stalls ...
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2answers
25 views

Required servo control current

When using a mini servo (3 wire) for RC models, I've found both designs which connect the signal wire straight to a 555 chip and some that do it via a simple transistor off the 5V line. I haven't ...
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1answer
31 views

Servo control signal as analog input

I'd like to construct a device which can control a servo in one of two modes - passthrough the original signal, or override with own values. Am I correct in thinking that I can just smooth out the ...
0
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1answer
27 views

Powering RC Servos using Switching Power Supply

I have 3 RC HV Servos (working voltage 6-8.4V) (link). I purchased a 75 Watt Switching Power Supply (link). The servos draw about 3amps at full load.Is a 75Watt supply sufficient or do I need more ...
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0answers
100 views

High voltage DC offset servo

I'm working on a project and I need some assistance. I have an audio tube amplifier output stage that I need to have adjustable operating points while maintaining a DC null at the output. [![enter ...
0
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1answer
29 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
63 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
81 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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1answer
36 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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2answers
45 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
65 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
64 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 ...
0
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1answer
153 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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2answers
271 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 ...
0
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1answer
45 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
231 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
59 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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0answers
61 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: ...
0
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1answer
45 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
143 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 ...
0
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1answer
42 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
51 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
131 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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2answers
122 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
1k 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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3answers
69 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
84 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 ...
0
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1answer
119 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
62 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
60 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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0answers
129 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
64 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 ...