An electrical actuator converting electrical energy into rotational motion.

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0
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2answers
54 views

Stepper motor stalls at low frequencies. Why?

I picked up a Howard Industries 1-19-4200 (5 wire) stepper and have been driving it on my testbench with a PIC18F2550 and L293D. I recently added a potentiometer to an analog pin of the PIC for speed ...
0
votes
0answers
35 views

Seeed Studio motor shield [migrated]

My goal is to have my Arduino fire two stepper motors. They need not be simultaneous. I'm using an Arduino Uno with 2 motor shields - specifically, the Seeed Studio Motor Shield v1.0. I know this ...
0
votes
1answer
41 views

What is the torque of motor when dead weight added to the shaft? [on hold]

How to calculate the torque of motor when external dead weight (say 70Kg) is hanged over motor shaft? How to find the starting of motor?
0
votes
1answer
17 views

Sharing the Seeeduino LiPo with a motor controller

I'd like to use a Seeeduino to control a small DC motor to wind/unwind a thin cable which will be lifting a small door. Ideally, I'd like to use the same LiPo that's being used to power the ...
0
votes
1answer
35 views

Surge Protection for pump relay

I have a 24 volt relay that starts a 220 volt pump motor for a sprinkler system. The relay and pump are about 800 yards from the 24 volt signal generator. I have had four relays go bad and fail. I ...
0
votes
1answer
53 views

DC 5 Volts - 2100mAh Electric Motor Generator. How?

I have spent my entire weekend trying to locate a place where I can buy a 5 Volts - 2100mAh Electric Motor/Generator. My goal is to spin this motor up to a certain RPM to generate the 5 volts and ...
0
votes
1answer
91 views

Four different pwm using PIC 18f45k80

In a 4 phase dc motor control application, I have to excite the coil using Mosfet with the pwm of 12.5 Hz with the train of pulses of 12 khz on each phase. So I am in a position to create 4 different ...
2
votes
2answers
62 views

Using a motor as a generator: How fast does it need to rotate?

I have a dc motor with the following specifications: ...
1
vote
1answer
358 views

How to Control SM1 Inverter Drive Frequency with Arduino?

I am back at trying to control the frequency of an SM1 AC inverter drive due to the fact that I never got it going the first time. However, this time I would like to use an Arduino. The manual for the ...
2
votes
2answers
118 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 ...
2
votes
3answers
186 views

Four-contact push-button switch; what's the pictured switch called?

I have single phase submersible pump, around 400 foot underground in a Bore-well and its controlled by the controller shown below. The green button is a push-button switch which if pushed and held ...
0
votes
1answer
39 views

Why does my PWM Arduino loop not working as intended?

I have a Arduino sketch I am trying to use to control a DC motor using PWM. It seems it it just running the motor as if I the PWM was set to 255 (100%). I intend for my sketch to start the motor ...
0
votes
1answer
46 views

How does a CD-ROM rotor know when to stop the moving plate?

I need to make a mechanism with a RaspberryPi like in CD-ROMs, so I can easily move a plate from the minimum position (CD-Rom closed) to maximum (CD-ROM open). I have a DC motor (from CD-ROM) and I ...
0
votes
2answers
85 views

Can the output of two 15-amp motor drivers be hooked up in series to achieve a 30-amp tolerance?

I had a cheap 15-amp motor driver that I bought on eBay. You can see product details here. I was planning to use this motor driver to power my robot, which uses two 24v wheelchair motors. Then I ...
1
vote
1answer
241 views

How to make a circuit to run DFRobot with a Netduino

So I ordered a DF Robot kit and got some help to put it together. I want to control the wheels with my netduino. What I want to do is simple. Press the netduino's button, and start the 4 wheels in ...
2
votes
1answer
73 views

Laser controller project

The context is that I want to build a tunnel laser effect, that modulates the angle of the cone according to a sine wave. The purpose being, to create a cool Borg weapon effect for a Star Trek Borg ...
0
votes
1answer
92 views

L298N damaged? What to do?

I'm trying to control a DC motor with the L298N motor driver and it worked for a brief moment. I've used the setup mentioned in this video tutorial, but someone in the comments said that with this ...
0
votes
2answers
83 views

How do amps affect RPMs?

I bought a replacement pellet stove auger motor rated at: 120V, 0.51 amp, 1 RPM. (ASIN: B0032D26I6). I installed it into the stove and it works, but the feed rate ...
2
votes
2answers
1k views

Arduino Ardumoto

I am using Arduino and Ardumoto dc motor controller to drive a DC motor. I am kind of at lost because i have gone through 10 different motors. They either don't work( not enough power ) or not ...
0
votes
1answer
63 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
0
votes
1answer
126 views

How can I limit the current in a 12v car battery to be safe for my 25a motor driver?

I have a 25amp Sabertooth Motor controller that can be powered by my 12v car battery. I have big 24v wheelchair motors attached to the motor controller. I do not know how much current that the motors ...
2
votes
2answers
583 views

I need help designing a speed control dc motor circuit

We were asked to design a motor speed control circuit using A 15V Source -> Potentiometer ->LPF-> Op-Amp -> ADC ->DAC ->Op-Amp-> Motor Driver -> 3V DC Motor (because of its low cost) I am going to ...
-4
votes
1answer
55 views

How to extract the motor that spins at a very high speed in a dvd drive? [closed]

According to this, this and this, I gather that there must be a motor inside a CD/DVD Reader/Writer which makes the CD/DVD spin at a very high speed. I have two old working drives and I want that ...
0
votes
1answer
372 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 ...
23
votes
6answers
13k views

Why does a Tesla car use an AC motor instead of a DC one?

I was just watching a mega factory video and wondered why they use an AC motor which requires a power inverter instead of DC which may be powered directly from their DC battery? Introducing an ...
-2
votes
0answers
72 views

How to control wheelchair motor?

I am trying to make motorized wheelchair and I have two 24V wheelchair motors, but I don't know the connection diagram of motor. There are four wires coming out from the motor,two for the power and I ...
0
votes
1answer
89 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 ...
1
vote
1answer
96 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 ...
1
vote
1answer
45 views

Stepper motor drive supply voltage

I am going to use the SM42HT47-1684A stepper motor, its datasheet is following: http://p.globalsources.com/IMAGES/PDT/SPEC/001/K1052328001.pdf In the datasheet the rated voltage of the motor is 2.8 ...
0
votes
1answer
82 views

Motor/driver for smoothest and most constant speed

Which type of motor/controller can maintain the smoothest and most constant speed in the range 300 - 1000 rpm with minimal vibration? ie: low cogging torque, etc. I have an application in mind which ...
0
votes
2answers
48 views

What will happen if we excite a Synchronous Machine with AC?

Normally we excite Synchronous Machines with DC. But what would happen if we provide AC in place of DC in field winding of Synchronous Machine? Will Synchronous Motor start in with AC excitation?
1
vote
1answer
53 views

Differential Drive for Heavy Robot

I'm asking here another question in relation to my previous one. I would like to know how would one proceed when you want to control a heavy robot with differential wheel drive. When it comes to ...
0
votes
1answer
108 views

How to short a dc Motor with arduino?

Thanks for the reply JYelton, Below is the requested diagram of my circuit. simulate this circuit – Schematic created using CircuitLab How to short a DC motor? I was trying to short ...
16
votes
3answers
2k views

Why don't all motors burn up instantly?

A motor rated for 3S (11.1 V) has an internal resistance of 0.12 ohm. The maximum current is 22 A. 11.1 V / 0.12 ohm = 92.5 A Doesn't this mean ...
2
votes
1answer
61 views

Does L293D consume power when not in use

I am designing a robot using the L293D motor driver, and I have just successfully hooked it up to my micro controller. I am using two batteries, one two control the motor and one to control the pic ...
0
votes
3answers
1k views

Motor speed control using arduino and quadrature encoders

I am trying to get precise control over the speed of rover 5 based robot. It has four PWM controlled motors and 4 Optical Quadrature Encoders. I am using 4-channel motor controller with rover 5 ...
0
votes
1answer
57 views

Determine power needs of a motor

I recently stripped a motor out of an old 2887-z gaf dual-8 mm projector. I'm not even sure if the motor AC or DC, although I suspect its a brush less ac motor. Unfortunately, I disposed of the ...
0
votes
3answers
381 views

How to choose a PIC for a BLDC Motor Controller?

I just made a BLDC motor controller, but I'd like it to be able to go to higher frequencies (have less dead time, faster firmware, etc). In particular, I'm aiming for 20kHz-to-50kHz range, but am ...
2
votes
1answer
3k views

What power motor should be used to power a Segway-like device

I am planning on building a personal transportation device which will either be a skateboard with a motor etc or a Segway-like device. I will have two wheels and must be capable of getting me to move ...
1
vote
1answer
37 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 ...
0
votes
0answers
106 views

Control 12v motor with 5v PWM

I have 5v PWM (555 generated) and I want to control speed of a motor using it. The problem is my motor is 12v and by diving it with a 5v PWM I can't reach full speed of a 12v motor. my pwm generator ...
1
vote
0answers
98 views

How to tell whether a motor is an AC or DC motor?

I watched a youtube video http://www.youtube.com/watch?v=hT3jJRGVdW4 The man says : by spinning the motor to see whether the output is AC or DC, then it can tell whether the motor is generating AC or ...
2
votes
1answer
67 views

Power supply problem with L293D

Recently I was trying to drive two motors with atmega328 and L293D motor driver IC. The power supply section is shown below I used a 12V battery with high current driving capability.The motor was ...
1
vote
2answers
86 views

H-Bridge ic not working as expected

Hi I am using the SN754410 h-bridge driver to try to control a motor using two switches. As I understand the SN754410 should be identical to the L293D. I have hooked up a circuit and I think I have ...
2
votes
2answers
161 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, ...
4
votes
2answers
263 views

What is the purpose of the Motor Run Capacitor?

Looking at a control box for a marine Air Conditioner and it has a HUGE capacitor in it. The schematics label it a "Motor Run Capacitor", but I always thought it was just used to start the motor. ...
4
votes
4answers
226 views

Control torque of 3-phase AC motors

Actually, we have 1x30HP, 2x10HP motors working at our workplace. When we start the motors there is a lot of torque generated due to which our grid supply charges us penalty every month. We need ...
-1
votes
2answers
47 views

Change the motor or the gears?

I wonder, what's better to achieve some given torque? To chose a motor with the Kt that gives that torque or to choose a reduction drive that will output that torque from a given motor? I wonder ...
1
vote
0answers
88 views

Use a 2N7000 in place of 2N2222A

Here's a description of both circuits. A ring shaped magnet is mounted on a brass axle and a set of bearings. Coil A and Coil B are wound on the same core. The magnet is placed about 1/8 of an ...
0
votes
1answer
140 views

Useless Machine geared motor

I am attempting to build a “Useless Machine” from scratch. Here is a video of the device: http://www.youtube.com/watch?v=Z86V_ICUCD4 . Also [if you want to], Google "The Most Useless Machine EVER! ...