An electrical actuator converting electrical energy into rotational motion.

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1answer
126 views

(Arduino UNO) Random Button inputs due to change in code

(First of all: Sorry for the Title.. I really don't know how to describe my problem in one Sentence) I'm an arduino beginner. I build a two button control for an electronic motor. simulate ...
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0answers
119 views

Old variable speed AC motor wiring

As a disclaimer, I have a little electronics knowledge, but I'm no expert. I've been given an old 1940's Hunter fan and I'm working on fixing it up. I took the base apart and wiring is pretty bad - ...
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0answers
87 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 ...
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1answer
56 views

Serial port controlling a motor bridge--unknown bug

This is part of a project where I wanted to bypass using a microcontroller and control motors directly with my laptop. I'm using a usb-to-serial cable and use the serial RTS and DTR to control a ...
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2answers
195 views

What voltage of Li-ion battery to run 24 volt motor (6 cell or 7 cell)

I have the option of replacing my aging and almost dead lead acid batteries with Li-ion to run a 24 volt motor. The data sheet for the Li-ion cells report the cells as having a nominal voltage of 3.8 ...
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1answer
118 views

L293DNE Always On

I am hoping to put together a circuit that will control a slot car track from a 30V 3A power supply. I have used the L293DNE as I thought it would cope with the extra load. The circuit is based on ...
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1answer
725 views

How to wire external power supply on stepper motor

I followed this tutorial to setup my stepper motor. Now my stepper needs 12V and not 5V. So I was wondering how I can add an external power supply without destroying my pi. I found this: But it ...
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1answer
50 views

What are the effects of the different design parameters when building a linear motor?

I am trying to build a so-called "ironless" linear motor. Conceptually, they are quite simple. Linear motors, generally speaking, are just like rotary motors but "unrolled." As I understand it, the ...
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1answer
133 views

difference between a DC motor and gear motor [closed]

Isnt DC motor the same as gear motor? Because what is the use of dc motor without gears?
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1answer
65 views

is it possible to use a circuit to reliably measure when a motor has 'stalled' [closed]

ive been fixing my electric garage door opener and it got me thinkin... the motor turns a geared chain that moves the door up and down. there is a small mechanical device attached to the mechanism ...
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0answers
49 views

Where can I find synchronous machine parameters to use in a PSCAD simulation?

I am trying to observe a loss of field on synchronous motors of different types and sizes. PSCAD seems to want a DQ equivalent circuit. I've Googled the problem and tried several manufacturers' ...
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1answer
117 views

What kind of motor would I need to turn this central heating valve?

I often forget to turn my central heating down when I leave the house, so I thought it would be cool to make a device that could do it for me and to have a website where I can check and change the ...
0
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1answer
122 views

H-Bridge diode makes the motor go faster

I am making a little robotics project were my robot spins around a shaft. Since it can't spin a full 360º turn I placed some limits in the software but just to be sure I also placed two limit switches ...
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2answers
47 views

What is the possible reasons that cause the different motor strokes of two directions

The question may be a little too specific since it refers to some special choice of the motor parts that may not be used for everyone, yet I would like to learn about the general debug methods if ...
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2answers
430 views

Can I run this motor off of this solar panel?

I am trying to build a solar powered boat, and I have decided upon this 5V, 500mA panel. I can buy 3 or 4 of them to get up to the necessary voltage and amperage. The problem I have is that I can't ...
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1answer
101 views

DC Motor Control - h-bridge pulsing strategy?

Question is with regards to a DC motor controller built around an Allegro A4940 and four discrete FETs. There are at least four possible strategies for driving the FETs, and I'm struggling to ...
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0answers
107 views

Control Loop Frequency [closed]

I haven't started tuning/setting up my controller(s) yet, but already having trouble with the control loop frequency. This code shall later control the position of a X-Y stage. The code: ...
4
votes
2answers
217 views

Ideas for precisely moving a small object in 2 dimensions?

We would like to precisely control the position of a small object in a X-Y plane. The object we are moving contains a LED diode and some optics. The restrictions are: The total area is 9mm x 6mm ...
2
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3answers
296 views

PWM'ed DC motor not running when loaded

I am trying to build a robot with the Arduino Uno and the H-Bridge SN75441. The robot has 2 1.5V rated motors. I set it up with this tuto: http://www.mlbelanger.com/arduino/ard-bot/ So the circuit ...
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1answer
99 views

Using a solar car battery charger to power a solar boat? [closed]

I am participating in a contest in which I need to build a solar boat (it has to fit into a 1.5' wide by 2' long by 1' high box and draw less than 2"). I currently have a 12V solar panel made for ...
2
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2answers
153 views

DC Brushless Motor For Electric Rover

I'm an industrial designer, and am working on building a small electronic rover, however I've been doing some research and I feel a little bit lost in terms of what motor is best for me, The device ...
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votes
1answer
126 views

What mechanic for opening the roof window of a Greenhouse [closed]

I'm asking myself what would be a cost effective mechanical unit for opening a 30x30cm pitched roof window in my greenhouse with my microcontroller STM32F4? At the moment the window still has a glass ...
4
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2answers
300 views

Result of constant current through DC motor under different loads

I've done some research on brushless DC motor and have a few questions what would happen when a constant current is sent to a DC motor. From my understanding, the current is directly related to the ...
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3answers
272 views

What sort of electric “motor” would I need to launch a puck?

As the title suggests I am looking at making a hockey puck launcher so I can do some off ice technique training as a goal tender. I have no one to train with so I wanted to create a puck launcher ...
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3answers
138 views

What exaclty is the purpose of a Hall sensor in a BLDC?

I was reading an articles about brush-less DC motor, used in CPU fans, form this link. First I thought that the Hall sensors are used only for measuring the speed, but that is not correct, it has ...
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1answer
165 views

Removing jumpers from an L298N Dual H-Bridge

I've got an L298N dual H-bridge which I'm using to control two DC motors with an arduino. I want to be able to control the speed of the two motors using PWM. My understanding is that I need to ...
0
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1answer
474 views

Alternative to easy-driver (or adafruit motor shield ) on breadboard [duplicate]

I'm up to implementing bipolar stepper drivers with STEP and DIRECTION inputs just as like easydriver and pololu stepper drivers but that on breadboard.Earlier I was using L293D to do that , but it ...
2
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2answers
1k views

Purpose of the diode and capacitor in this motor circuit

I'm hooking up a small DC motor to an arduino using an NPN transistor using the following diagrams I found online: The circuit works, and I'm successfully able to make the motor run. Now, I'm ...
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0answers
61 views

Two wire circuit of H-bridge as Bipolar stepper driver for CNCs and 3D printer and stepper motor vibration and noise issue [duplicate]

So after searching a lot and looking up every Jack and Jill's website for 3/4 axis cheapest DIY stepper driver for the 3d printer and CNC. I have come to the conclusion that using L293d with ...
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1answer
654 views

G-code compatiblity with H-bridge L293d

I'm trying to make a 3 axis bipolar stepper driver and I think using L293Ds and Arduino is the best cheapest option. I have seen people using grbl to run their steppers easily but with grbl they ...
0
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1answer
145 views

Unused slots in the stepper Motor

The motor I am talking about has six wire slots of which two are unused and wires coming from the motor are restricted to four (4 to 4 jumper connecting wires are there to connect the motor ).So why ...
0
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0answers
40 views

Why do we use variable reluctance steppers?

AFAIK, variable reluctance steppers have non-magnetic soft iron teeth and they align themselves so as to have minimum gap I don't understand what does this line mean? How does it align itself with ...
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2answers
151 views

Why do I need PWMs on Arduino but not on ATMega16 or PIC16 to drive the stepper motors with L293d?

Seems to me , I'm lacking some concepts here. From what I know is that PWMs pins are essential for driving the motors (as they can drive the motors at different speed with diferent duty cycle). So ...
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2answers
249 views

How do I know whether a circuit (originally for 5 wire) will work for four wire stepper motor?

There is a very old and popular instructable 3 axis stepper motor driver, http://www.instructables.com/id/Easy-to-build-CNC-Mill-Stepper-Motor-and-Driver-ci/ As clear from the image , it's a six ...
2
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1answer
157 views

Is there a way to get more PWMs from Arduino Board?

I want to control 4 steppers with Arduino UNO and I'm all short of PWMs.In every tutorial over the web they have used PWM pin , in that case I can at-most use only two steppers with Arduino.So why it ...
0
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0answers
65 views

Which would be the best option for driving the 3/4 axis stepper motor for 3D printers?

I have researched a bit over google and reprep websites and come across different circuits/methods to drive the stepper motors. Being a student only , I have budget issues and I want it to be less ...
0
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1answer
83 views

Components necessary to automate hand crank

I'd like to automate a simple crank on a rotating hex bolt thingy so I don't have to manually turn the lever/knob. I was planning on bluetooth module -> Arduino (or some easily programmable MC) -> ...
3
votes
3answers
418 views

How do DC motors work with respect to current, and what consequence is the current through them?

Motors in general have always been a difficult subject that I cannot fully wrap my head around. Considering DC motors, what determines the rate at which the motor spins? It was my understanding that ...
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votes
1answer
135 views

Controlling throttle valve with PWM and TIP120

I'm trying to achieve this. He's using a darlington transistor, so I started looking for an appropriate circuit. I've made that, with a TIP120, using a 1k4 resistor (instead of 1k) and a 1N4007 diode ...
0
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2answers
148 views

What is interpolation in encoder?

I need to buy a servo motor and need high accuracy control. A sales engineer tells me that the servo motor has 1024 encoder, and its servo drive has interpolation technology which can make the ...
0
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1answer
110 views

Torque measurement of induction motor

what device should be used to measure the torque of 3 phase induction motor? The motor is of 3000 rpm or greater
2
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1answer
253 views

DC motor starting and stopping

I'm powering a motor, and instead of rotating at a constant rate, it rotates roughly a third revolution every half second or so; the rotation keeps starting and stopping. There's no load on the motor, ...
0
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1answer
159 views

L293D outputs different in different motors. Are there different types of DC motors?

I recently picked up a used Spider King RC toy from a thrift shop (http://amax-toys.en.alibaba.com/product/337890538-212191267/rsc_9021_RC_Spider_King_car.html). It had no remote or battery charger ...
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1answer
74 views

How we can control the DC motor [closed]

I have an DME60B motor (DC) with 24V and 490 RPM. I want to turn it on every 8 am Daily and to work for just 5 min. if we want to change the dirction of the motor after 2.5 min to work reverse? what I ...
-4
votes
1answer
223 views

How do I build a light-activated motor? [closed]

I'm trying to build a motor that is activated when light shines on a photoresistor/transistor (can anyone explain the difference?), but I'm totally lost right now. I can only utilize wires, batteries, ...
1
vote
1answer
75 views

Driving a Servo a Motor

I want to drive a servo rc motor I just purchased, I am a newbie in the electronics world. I would just like to test out the servo motor first and actually get it to move. So far I have figured out ...
3
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4answers
265 views

Is my H-Bridge design correct

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. ...
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2answers
148 views

Part numbers on Johnson motors don't match their catalogures

I've bought three motors which look like cordless drill parts, DC. I intend to use motors 1 & 2 to drive the left and right sides of a robot, and the third will probably be useful for a future ...
9
votes
3answers
716 views

Are there any types of DC motors that self-lock themselves?

I have a small DC gear motor which spools a plastic line. Once I've engaged the motor to tighten the line, I want to lock it in place so that the line doesn't unspool. I would then like it to remain ...
1
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2answers
598 views

Shaded pole motor coil calculation, rewind 110v motor to 220v

I have yj61 series motor. Something like this It's rated AC120V 60Hz 3000RPM and was damaged by accidental connection to 220v mains. I can't find suitable spare motor, so I have to rewind this one ...