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motor

Biped Howto: Moving servos

+++ UPDATE (12-march-2014): Rename title as "Biped Howto".

Hi, I will try to explain, in a very simplistic manner, the way in which servo motors can be controlled.

Servo motors are controlled by a PWM signal, in which the active part of the signal (known as duty cycle) define the amount of degrees the servo will rotate.

Controlling powerful motors

Hello guys,

 

I want to control a powerful motor not like the ones used (servo motor) I need something of the ones which work on 110\220

 

I am not sure if it is possible using picaxe, if so is there any tutorial or has anyone done this before?

 

Obvioiusly it should be powered externally and controlled by picaxe

 

If this is not possible what can the strongest servomotor provide me? Can it for example to move the steering wheel of a car?

 

Best

High speed omni directional robot ideal for soccer bots
Using a
Now with video, Scamper appears to be a little wobbly at slow speeds but that is because at only 6%, the motors are constantly stalling and restarting. Once the … Read more

How to Choose an Electric Motor

Finally I am sick of mowing my lawn, and am starting to plan a robotic lawn mower.

I would like to use one of these batteries (12V Li-ion) on the mower.

Updated instruction manual for Mini Driver

The Mini Driver was released by DAGU some time ago. It is essentially our Magician controller in SMD format. Unfortunately the engineer who designed it does not have very good English so I was asked to re-write the manual. You can view/download the manual from here: https://drive.google.com/file/d/0B__O096vyVYqczRjX1k5LTRkcjA/edit?usp=sharing

Suggestion arduino Motor Shield with Brakes

 

Hi,

I have built my first robot (ultrasonic sensor, 2 wheels, 2 dc motors) using  he following motor shield(bought from ebay)

New V3 Arduino Driver Motor Controller Shield L298N 2A 2 Motors Module

Unfortunately my robot always bumps into walls. It turned out that I am not able to apply BRAKE.

Transistor based H-Bridge

Hello everyone I realised after burning through 6 L293D's that they were getting old. I hated them mostly due to the fact that they were fragile. I also burned 3 of them because of static electricity. So I decided to try and make a cheap H-Bridge from transistors. This is just a test circuit what I need to know is: is the circuit correct, can this type of H-Bridge handle more than 2 Amps depending on the transistors used, and do you guys have any suggested modifications if it is wrong.

T'REX controller now available from Sparkfun

Good news for anyone wanting to control big motors up to 24V with stall currents as high as 40A. The T'REX robot controller is now available from Sparkfun.

https://www.sparkfun.com/products/12075

The controller is basically an Arduino Nano 328 with a switchmode power supply and high current motor drivers with electronic braking and current monitoring.

Pushing the limits with encoders

This is now a tutorial and can be found here: http://letsmakerobots.com/node/39098

I've been working on some code so that a simple Mini Driver using a lowly ATmega8A can drive two motors with encoders and 8 servos. This may not sound hard at first until you remember that the Servo library kills PWM on the ATmega8. To make matters worse, D2 and D3 are the external interrupt pins but we need them for driving the servos.

As usual my design has to do with water and something that my brother asked me to have a look at. What he needed was a way to launch a probe with a controlled … Read more

Seeking Advice: Selecting Electric Motor and Power Source for Musical Robot

Hello All! This is my first post. I am a relative novice to electrical work and robotics. I have experience wiring my own guitars and putting together effects pedal kits, but that is essentially the end of it.

12mm output motorgearbox

Hi I am looking to build a 4WD robot with 4 independent motorgearboxes. I have some wheels that I would like to use that have a 12mm hex hub. I need a motogearbox with high torque, and a threaded bar or a tapped hole at the end of the output shaft. Has anyone seen/heard of a motogearbox with these specifications? 

Motor just buzzes, no movement

I'm trying to follow this tutorial:

http://myrobotlab.net/tutorial-control-a-dc-motor-with-raspberry-pi/


Now, while I'm not too familiar with Breadboards, since I dont have one, and can't afford one right now, I've had to take it into my own hands to carefully solder wires between the points. I seem to have everything done, but when I start the program, the motor DOES start a buzzing sound (don't hear it when the program is NOT running) which indicates I'm at least partway right.

 

So my questions are,

Raspberry Pi Lego car

Hello all,

I'm making my first robot using Raspberry Pi. My robot looks like a car with three wheels. Two of them are in front and have connection to motors, The third one is behind and it's no connection to motors.

I'm planning to use 2 simple motors (for each front wheel one). For now my robot weight 260g, and i have to add two motors and battery and i little of more constuction for holding motors and battery. I'm already found which type of motor should i use:

Motraxx MOTOR X-FLY 400 or Moteaxx MOTOR X-FLY 280.

rover 5 w dagu 4 channel motor control hardware problem?

I am running the dagu Rover 5 (4 motor/4 encoder verion) using a Mega2560 and the Dagu 4 channel motor control.  This is my first attempt at a robot, but do have some experience using several models of Arduinos and motor controllers. 

The code I used is from this first message (by Nick Gammon) and wired exactly the same: http://forum.arduino.cc/index.php?topic=82618.0

Shaft coupling from 0.125 D to 0.25 square

Hi, hoping someone can help me with what I think is a pretty basic question:

I have 2 motors with a 0.125inch keyed (or D) shaft.  I need to connect it to a 0.25" square socket (vex tank tread driver).  I assume there's some sort of coupler or adaptor that could help with this?  I've been looking for most of the afternoon and haven't found any good solutions but I imagine it's largely due to me not knowing where to look...this is my first robot so I'm a bit new to the whole connnecting a shaft thing...  many thanks for any suggestions or thoughts.

motorcontroller board [FIXED]

Hello

I am trying to build a segway, I know how I am going to make it, but I have been struggling to get the motorcontroller to work for days now.

I attached an accelerometer and a motorcontroller to an arduino uno. When I tilt the accelerometer 2 indicatorlights on the motorcontroller change, so this signal must be right. But when I measure the voltage at the motor output I get only 10-60 mV.

I tried using more and using less Volt (5-15 V) on the m.c. board itself. (I attached it to an old model train transformator)

Please Help

 

New natural rubber tires from DAGU

When DAGU first produced the “Magician” series of low cost robot chassis’s we used a wheel commonly available in the market.

My DC motor stopped turning fast

Greetings!

I am working on a car like robot that has two 4.8V DC motors, one on each side (Differential drive) , the two motors were working perfectly fine but suddenly one of them stopped turning fast as it used to be. i measured the voltage across the motor and to my surprise the voltage was even higher than the other motor that is still working. I am using L298 H bridge as a motor controller.

in addition, the motor does not even start until i give it a push by hand.

any help would be really appreciable.

Goes insanely fast for it's size.
Going Whole HOG (or GWH) is my first foray into building a Hemispherical Omnidirectional Gimbal drive type robot/RC device. I first encountered the HOG drive right … Read more
all in one robot control board
This project aims to create an all-in-one robot control board. Unlike the arduino platforms, this board will contain servo drivers, motor drivers, accelerometer, … Read more

Motor Shield with current measurement

Hi all,

Today I want to introduce our new product - Motor Shield to you.

[img]Elecrow Motor Shiled[/img]

The Motor Shield is a platform for robotics and mechanical applications based on L298N. The biggest characteristic of this Motor Shield is it can measure the driver current via the two high power cement resistor(the two big white resistors in the picture).

Servomotor torque requirement for a quadruped robot

Hello,

I'm planning to build a quadruped robot soon. My design is very similar to the design in the following link.

http://letsmakerobots.com/node/28077

I'm not that good at mechanics. I like to calulate the torque required for each motor. Is it ok to use the formulas/procedure in the following link to design a quadruped shown in the above link?

http://letsmakerobots.com/node/28077

photocell with motor, no programming

Hi, im new to the forums and I need some help running a dc motor with a photocell without any micro-controllers.

Heres the list of parts I have:

-Tip120 transistor

-1n4004 diode

-1k resistor

-photocell

-solderless breadboard

-jumper wires

-9volt batter with battery connector thing

-a small dc motor (i dont have much information about it except that it seems to run on 3.3volts:( )

Attempts to dominate the lounge room
Using a
I want to teach my seven year old son about robots. Lego Mindstorms is a cool system but way too expensive. K'nex is much cheaper and makes a great robot building … Read more