Tagged Questions

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

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5
votes
5answers
271 views

Can a motor's movement be improved to any arbitrary resolution?

For a project that I'm working on, I need motor rotation at extremely small increments -- my desired resolution is about ~0.15 degrees per minimum rotation step. Of course, most motors of reasonably ...
1
vote
1answer
64 views

Voltage drop when servo activates

Background This is a follow up to an earlier question I asked - I have an ATmega2560 running a number of sensors and servos. There are two separate SMPSs running off a single 12V battery, one ...
2
votes
2answers
112 views

Powering multiple devices from a single power supply

I am learning electronics on my own and have been having a lot of fun. I am currently working on creating a Nerf sentry gun for fun with my son. I am at a point there where I need to power multiple ...
0
votes
1answer
56 views

How can I use 15 servos with arduino mega2560 without stepping down voltage?

How can I use 15 servos with arduino mega2560 without stepping down voltage? because I want to control 15 servos by one board (arduino mega 2560).
1
vote
2answers
88 views

Are large electrolytic capacitors necessary in a servo system that doesn't need to be precise

I have two servos in an autonomous sail boat. One controls the rudder, the other the winch. I try to use both sparingly to minimize power consumption, and so I disconnect each unused servo through an ...
-1
votes
1answer
71 views

Where can I find used servo/stepper motors? [closed]

For practicing purposes (Arduino and other controllers), from what old equipements can i recover (recycle) small servo/stepper motors? Maybe old printers...?
0
votes
1answer
33 views

Does a modified “continuous rotation” servo typically create an H-bridge motor controller?

A common technique for driving small hobbyist robots is to make a "continuous rotation" servo by replacing the feedback potentiometer with two resistors of equal value. Does this modification ...
0
votes
0answers
34 views

How to create (static?) electricity? [duplicate]

First off, sorry if this isn't the right place for this, but I am hoping electrical engineering is the right direction with this.. Long story short, I have a servo motor connected to an arduino board ...
2
votes
1answer
75 views

How can I find and remove servo/motor noise from this audio amplifier?

I am troubleshooting an audio noise problem in project which has several components wired together as follows: Overview: The overall project does some motion control with a servo and has an audio ...
1
vote
2answers
92 views

Servo does not stop in a stable position

I am currently playing with the HS-485HB servo, and I noticed that very frequently the servo will not stop in a "rest" position after it stops moving, even when external forces applied to it are tiny. ...
2
votes
1answer
34 views

PWM or switch port programmatically for Servo

Is there a huge difference between using a PWM and switching a port through a program (like using switch) for operating Servos? For smooth movement is PWM necessary or switching using a program will ...
0
votes
2answers
92 views

How do you power 6 servos

I have 6 MG996 series servomotors. A single motor can be controlled by an Arduino board using a 5V power supply. Some specifications Running Current 500mA - 900mA @ 6V Stall Current 2.5A @ 6V ...
0
votes
0answers
28 views

Op Amp Servo Loop Auxiliary Amplifier

I'm planning to build a op amp servo loop for op amp measurement. (see http://www.analog.com/library/analogdialogue/archives/45-04/op_amp_measurements.html) Does anybody have experience with the ...
0
votes
1answer
80 views

What servo-motor (torque, power) is you think needed to rotate shower faucet? [closed]

Also how do you think you could create electronically controlled faucet? I know that there exists magnetic valves, but they consume power all the time they operate, whereas I want a solution that ...
0
votes
1answer
111 views

Low-cost Up-Down Servo solution

I have a small project and I'm interested "upgrading" to a more produce-efficient design. Please note I'm no electrical engineer. I want to move a small servo (like this one ...
1
vote
1answer
126 views

How do I replace an existing servo with a geared DC motor?

I am a complete beginner, just getting into the world of electronics, in particular robotics. I have found a really nice open source set up that I want to build on and change for my own ends. The ...
3
votes
1answer
243 views

Drive a 4.8V servo signal line using 3.3V

I have a servo with an operating voltage of 4.8V. I want to drive the servo from a MCU running on 3.3V. I haven't tried it yet, but was wondering if I needed to drive the signal line to 4.8V using a ...
4
votes
2answers
168 views

Electronic Speed Control Concepts

I am a programmer who has never worked with electronics before. I am learning the concepts and hoping to build a quadcopter, with the control software entirely written by me. Motor control seems to be ...
0
votes
2answers
157 views

Can a Raspberry Pi control a servo motor? [closed]

Can a Raspberry Pi (RPi) board can control a 10Amp servo motor ? I read on the Internet that a RPi could control small servo motors. If so, is there an add-on board that, when connected to the Pi, ...
2
votes
2answers
358 views

Control servo motor via PID to stabilize a robot wheel using IMU

I'm trying to stabilize a robot with a servo motor attached to two wheels of a robot. I already built the system as following: Apply Kalman filter to gyrometer/accelerometer output Calculate a roll ...
0
votes
0answers
66 views

How to connect SINAMICS V60 driver to RaspberryPi

I have a Siemens motor with SINAMICS V60 driver (10A). Here is the Getting Started Manual (28MB PDF) . I want to connect this driver to the GPIOs of my raspberry Pi board. The purpose is to control ...
0
votes
0answers
98 views

Generating a Trapezoidal Motion Profile

I'm working on a project which involves the use of a servo motor to pull an object along a track. The servo motor will have a quadrature encoder to calculate the position. I'll probably implement this ...
1
vote
1answer
115 views

Can a Solenoid be driven from one of the pins of a Servo controller?

Would it be possible to operate a solenoid (e.g. this Plastic Water Solenoid Valve - 12V - 1/2" Nominal, suggested for use with "a TIP120 or N-Channel power FET with a 1N4001 kickback diode to drive ...
0
votes
1answer
71 views

Turning off servos with a MOSFET

I'm trying to limit power used by servos. The application is such that I don't mind if the servo's position drifts a bit, so I just use an N-MOSFET to shut it off when not in use. A conversation on an ...
0
votes
1answer
112 views

Servo doesn't move when driven by a PIC micro controller [duplicate]

I have a PIC12F629 and a servo sg5010(for which I could not found any datasheet ) So I built this circuit : simulate this circuit – Schematic created using CircuitLab The LED is for ...
-1
votes
2answers
110 views

Servo connected to PIC does not work

I have a PIC 12F629 and I connected it to my servo (TowerPro sg5010 motor) per these details: PIC pin 1 to positive pin 8 to negative pin 2 to servo red wire (signal) servo brown wire to negative ...
0
votes
2answers
54 views

Considerations for a motor resisting a human grip

I'm trying to replicate this project at home, wherein strings attached to fingers and pulled by servos are used (instead of difficult pneumatics) to simulate an object in a glove as a version of ...
4
votes
2answers
583 views

How can the Arduino Uno support up to 12 servos if it only has 6 digital PWM pins?

According to this: The Servo library supports up to 12 motors on most Arduino boards and 48 on the Arduino Mega. On boards other than the Mega, use of the library disables analogWrite() (PWM) ...
1
vote
1answer
66 views

Step response of high-powered servo motor

I'm involved with a project that will need a servo motor to generate a high torque and a high speed in a short amount of time. Using typical speed/torque graphs and taking into account a certain gear ...
0
votes
2answers
72 views

Button cells for arduino uno

OK, before I start I know that there is significant difference and that the Arduino Uno is not designed to run off button cell batteries especially to run both the ...
0
votes
0answers
21 views

How do I connect my AKM Servo Motor through the Kollmorgan WorkBench?

I have an AKM21C servo motor from NI, connected to a AKD P00306 drive, which is connected to a UMI-7774 board. And I'm trying to connect it through Kollmorgen Workbench, but it doesn't detect a ...
0
votes
0answers
94 views

VirtualWire and ServoTimer2 on an Arduino Mega

I faced some problem in using VirtualWire and ServoTimer2 on a same Arduino Board. The RF module on the board work well, but the servo did not execute its operation as stated. Anyone had solution on ...
2
votes
2answers
652 views

Will a large capacitor damage a circuit

I have 32 servos running from a 7.5V battery rated at 2500mAh and I'm sure that it has enough power to handle the servos, but it doesn't look like it can handle all of the servos pushing at once. I ...
0
votes
1answer
545 views

How to power servos externally in Arduino

I tried to control 2 servos with my arduino. It worked fine but if I try to control 5 servos with my Arduino, it doesn't work. I want to power up the servos externally but I don't know how to do it. ...
0
votes
1answer
165 views

Will motors cause more noise when connected to a ground plane instead of directly to batteries?

I am making a small robot using an Arduino and two servo motors. There are two ways that I can provide power to the motors: 1) Run power and GND wires from the battery holder to the motors, then ...
0
votes
1answer
125 views

Control a servo motor

I'm learning to control a servo (SG90), I read at this tut: http://www.seattlerobotics.org/guide/servos.html "The servo expects to see a pulse every 20 milliseconds (.02 seconds). The length of the ...
0
votes
1answer
603 views

Safely driving a SG90 servo with AVR PWM

I've read that servos tend to draw anywhere from 10mA to 200mA. Is there a standard configuration to drive servos using MCUs without directly connecting them to the output pins of the controller? Or ...
1
vote
1answer
72 views

Do servo motor specifications take into account the gear ratio inside?

I know this question may not belong here but I assume this is most likely where the most well informed people can help me. I am looking at buying a servo motor for a an application that must be able ...
2
votes
2answers
463 views

How many servos can I run on an ATtiny85?

This is my first time asking a question on this website, so please correct me if I'm doing something wrong... I have been working on a small project which runs three Servo motors on an ATtiny85, ...
0
votes
2answers
188 views

Why is OCR1B values are not stored?

I have following program to control two servo motors: ...
0
votes
1answer
233 views

How to increment OCR1A value in ATmega16 through hardware?

For my project I am controlling servo motors through ATmega16 micro controller. The OCR1A determines the position of motor. I want to increment the OCR1A value through a hardware switch. I tried ...
2
votes
2answers
199 views

limiting servo current consumption

The tl;dr version of my question is - how can I trade off ability to hold an exact position for current draw. The full version - I've got a battery-powered system with a servo. the servo is ...
0
votes
0answers
118 views

Need Help in creating a driver for a 220v AC Servo Motor

I am a new to electronics and have been working on to design a Motor Drive for comonly available Serveo motors like: http://www.alibaba.com/product-gs/1580332915/servo_motor_used_in_CNC_machine.html ...
3
votes
1answer
85 views

How can I determine if a servo motor is in the commanded position?

Once I have set PWM to move a servo to a particular angle, is there a way to detect that the servo has finished moving? I am concerned about situations where the servo is encountering extra ...
0
votes
0answers
76 views

Measuring 0.9V across circuit when switch is open

I have a basic circuit which is basically 4 servos connected to a 6vdc battery, and their signal is controlled by an Arduino. However, I noticed that I could measure around 0.8-0.9V across the power ...
0
votes
3answers
490 views

How does a servo hold its position without drawing too much current?

In a standard DC motor if you supply a voltage and stop it from rotating i.e. applying a heavy load, it will draw a lot of current. How is this not the case with a Servo? How does it hold its position ...
2
votes
2answers
134 views

How to select the correct DC servo motor

I have to buy DC servo motors for a project. The problem is, I dunno how I'm supposed to pick the correct one. I'm going through the datasheets from different companies, and the models they sell are ...
3
votes
1answer
311 views

Servomotor takes too much power so the µController (ATMEGA328P-PU) resets all the time

I have got the following circuit diagram. For a little explanation. When the button is pressed the µC is powered for about 10 sec. The µC contains code that moves the servo. When the servo is ...
1
vote
3answers
260 views

RC Servo motor power supply

In my RC servo motor datasheet the shall current is 600 mA. My Arduino cannot supply that much of current so, I decided to use an DC adapter to supply the power and arduino to control the Servo. My ...
1
vote
1answer
2k views

Problem with arduino servo

This is my first attempt to work with a servo and I'm using this tutorial. I have a "TowardPro MG996R DIGI HI TORQUE" servo directly connected to my arduino uno as follows: I also created the ...