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

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19 views

Step/Dir input Servo Drive: how does it work internally compared to a serial input drive

I believe that the most common type of servo drives are based on STEP/Direction input which is inherited from the Stepper motor controllers. My question is how does the type of controller work ...
0
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2answers
26 views

Dual shaft servo motors? Do they have another name?

I am trying to find a servo motor where the shaft protrudes through the other side however I haven't been able to find much online. I am wondering if I have the term right though. Am i right searching ...
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2answers
53 views

Power supply circuit for powering sg90 servo. How to handle high current requirements?

I need to power a small sg90 servo motor. I could easily use a 5V battery but why bother? :) Aside from this not funny joke, I'd like to put to good use my little knowledge of electronics gained at ...
3
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1answer
126 views

Is a flyback diode necessary for a small sg90 servo motor?

I am powering a small sg90 servo motor (see datasheet) directly using a 12V battery and a simple circuit to step down the voltage to the appropriate one for the servo. I noticed the servo has some ...
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2answers
86 views

Designing a lock failsafe with arduino. Questions about reliability and design

I'm making a lock with arduino. I plan on using a servo motor. I need the motor to not consume power when the pins that lock the door and the body together are held in place until it opens. This is ...
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1answer
23 views

Control of Dynamixel MX28R via RS485

I have problem controlling dynamixel MX28R servo motor. I've tested two kinds of connection. First one to raspberry Pi B+ and ...
0
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1answer
51 views

Simple Servo Control Issues with PIC and ICSP

simulate this circuit – Schematic created using CircuitLab I have a project in which I am controlling/trying to control a Carson CMS-1 servo using a PIC. I have a board set up with a 7.5v 1A ...
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25 views

Servo Accuracy In Translation vs Rotation

I have a project that requires small accurate changes to position in a system. I have two options: 1. I can translate a small slit across an area to simulate rotation (light splitting involved, the ...
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1answer
130 views

What happened to all of the Dynamic Signal Analyzers?

Decades back there were at least half a dozen instrumentation companies offering Dynamic Signal Analyzers (DSA's). Not Spectrum Analyzers, but rather Dynamic Signal Analyzers. The main differences ...
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1answer
47 views

What causes servos to get damaged from high voltage?

I have 6 volt continuous servos. I needed to run them, but had no 6 volt power source nearby so I tried using a 9 volt 280mah rechargeable battery. The motor made weird sounds, but didn't work? I ...
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1answer
52 views

Sequential power circuit for 18 servos

I'm trying to design a servo control board to be a daughter card for DE0-NANO, but run into a problem where all the servos (18 for hexapod) get to the end position on power up. The initial idea was to ...
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2answers
74 views

What does a motor driver do?

EDIT: I understand now, but with a microcontroller, why can't I just connect the data pin of the microcontroller to the data pin on the servo and the power form a battery bank to the power on the ...
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0answers
22 views

Parallax servos (from BOE) move when no commands are sent through Arduino

I have Arduino zero and I'm using two continous parallax servos for movement. I have 2x5AA batteries, 5 for arduino and 5 for servos (1.5V each battery). In code I only use servo.attach(pin) nothing ...
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2answers
72 views

DC motor vs Stepper motor vs Continuous servo - Which one should I use? [closed]

I'm about to build a robot arm (trust me, I've already got most of it down), but I don't know which type of motor to use. From what I understand, DC motors do the same thing as Stepper motors but ...
0
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0answers
37 views

Moving a stepper motor in sine and chirp wave forms

I am trying to put together a set-up with a 4 - phase bipolar stepper motor controlled by an Arduino Uno and driven with a Leadshine ND556 stepper motor driver with a 12 V power supply. Once the ...
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2answers
70 views

Micro/standard servo resolution

I am building a project which requires a very fine servo resolution (<=.1 degree). I understand there is a lot that goes into servo resolution like digital v analog, dead-band, # of poles, etcetera....
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1answer
340 views

Controlling Servo motor SG90 from NodeMCU 1.0 development kit

I have a 5V "SG90 Servo motor" and would like to control it to move 0 degrees, 90 and 180 degrees, by sending it appropriate pulses from my NodeMCU Development kit. Having searched on the net - I ...
0
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1answer
60 views

Using Stepper Motor like Hobbyist Servo [closed]

I want to use a stepper motor in place of a hobbyist servo that I am currently using to actuate a throttle. The motor is to turn from 0 to 90 and modulate engine speed between these two positions ...
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1answer
99 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
75 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 way ...
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3answers
65 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 ...
0
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1answer
54 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
33 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
54 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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35 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
61 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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3answers
94 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
95 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 ...
0
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1answer
74 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
47 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 ...
0
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1answer
62 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
54 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
143 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 ...
0
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1answer
130 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
31 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
35 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
124 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
32 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
79 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
105 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
42 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
60 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
72 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
83 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
333 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
430 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
60 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
305 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
74 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 ...