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Questions tagged [actuator]

An actuator is a device for converting energy into motion. They may be pneumatic, hydraulic, electric, or mechanical.

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46 views

simple design for mechanized home automation devices to stop at limits [closed]

can you point me to any existing designs or ideas for simple DIY type mechanism to ... for example... roll up/ roll down a motorized movie screen and stop when it gets to some specific limits. i ...
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3answers
39 views

What is the current limit of driving a linear actuator for 4 VDC at 12 VDC?

Please bear with me, if this is a stupid question. I obtained a linear actuator of a family of linear actuators, here are the specs ...
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1answer
47 views

Can servos have a true neutral gear?

I am developing a mechanical arm that can be pitched remotely at a certain angle using a high-torque servo motor. The servo needs to keep the arm at a precise position for any give amount of time and, ...
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3answers
95 views

How to make linear actuators go in both directions? (Using arduino/microcontroller)

I'm stuck here, I want to make the lineal actuators to go up and down, both of the actuators move to the same direction at the same time. The arduino receives a signal as input and then the ouptut ...
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2answers
82 views

How should I make a constant AC current source to drive an electromagnet?

The inductance of the electromagnet is about 0.05H and the resistance is under 50 Ohm and I need about 2 to 5 Amperes to drive it. I need to be able to change the amplitude and also the frequency at ...
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3answers
83 views

micro-switch 12V DC use in vehicle?

Using 12V DC (max 3 amp) linear actuator in a standard car, I need to use some micro-switches in the power circuit to prevent the actuator powering, if it's not in the correct position i.e. won't ...
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1answer
26 views

magnetic actuator torque calculation

I would like to formulate how much load can carry for the magnetic actuator used in RC airplanes. Example photo: It consists of a coil and a magnet. And works according to lorentz force principle. ...
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0answers
33 views

Which power supply choose for lineal actuators?

I have two actuators each of them with the following characteristics: 16 inch, 12v, load 750 N, travel speed 10mm / s, duty cycle 25% BUT Current Draw is not specified, and I have no access to the ...
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4answers
283 views

Brushless motor design with additional separation layer at the air gap

As a thought experiment, I was thinking about how to actuate an passive impeller inside a tube from outside, contactless. Imagine a tube equipped with an impeller inside it. The impeller is mounted in ...
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0answers
60 views

Motor only works with alligator cables

So, I’ve run into a weird issue while trying to hook up a voltage controller box to two linear actuators. The voltage controller box receives an input of 12V and outputs 12 or -12 depending on what ...
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1answer
49 views

Loading an Asynchronous Generator

I am doing an experiment that involves loading an asynchronous 50 HZ generator. For the load to consume current it has to be a capacitive load to cause a phase shift between the current and the ...
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1answer
66 views

Linear actuator. Monitor end switch with arduino

For a hobby project I am developing a solar tracker. For this I obtained a linear actuator. It contains a DC motor, 2 Hall sensors and an end switch. I am using an Arduino Uno and a Polulu motor ...
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0answers
30 views

Low power thermal actuator/radiator head

There are a lot of thermal thermostats like this one that work on batteries. I searched for an actuator that is working with ~5V but I only find 24V / 220V . I can only find full systems that work ...
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91 views

Transfer function_Approximation of second order system for a linear actuator

I am trying to approximate a transfer function of a system. The system is a linear actuator, connected to a feedback potentiometer. The actuator has a mass on it. The following figure is a step ...
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1answer
137 views

How do memory seats keep track of their position?

I was wondering how do memory seats keep track of their position. Since this kind of equipment existed in 1990's cars, it must be simple yet ingenious. I have been thinking about this for quite a time ...
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2answers
155 views

How to get stall current from DC motor model

I'm studying the model of a dc motor from this link : http://ctms.engin.umich.edu/CTMS/index.php?example=MotorSpeed&section=SystemModeling The equations are: \$\ s(Js+b)\theta(s)=K I(s)\$ \$\ (...
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1answer
56 views

modeling of a dc motor with load

I designed a robot. It consists of an actuator, linkage and a camera. the actuator is considered as a dc motor in this problem. I need to identify this system. how can I find a model for actuator and ...
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0answers
55 views

Is there an opensource equivalent to Phidgets?

For those who don't know, Phidgets are a hardware platform for interacting between PCs and hardware; they're a sort of "industrial lego". They have DIO, relay drivers, sensors etc. Their key utility ...
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1answer
77 views

How to monitor an actuator's feedback line from a microcontroller?

the AG-020-B electric actuator is controlled from a microcontroller. Terminal 1 is connected to the DC PSU GND, Terminal 2 is connected to the +24VDC via a high side Power MOSFET(TPS22810) as shown ...
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2answers
284 views

Chicken coop door opener circuit

I'm designing a circuit that will open a chicken coop when the sun comes up. I've attached a bungee cord to the door which opens the door when a pin is released. This pin is released by a car door ...
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1answer
71 views

VNH5019A Flyback issue on custom PCB

I have a custom high power PCB I recently designed and am currently testing. It is designed to use 2 linear actuators link. I am using a VNH6019A H-bridge to control them. They operate simply as -12v ...
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1answer
59 views

Linear actuator suggestion - fast , powerful and small [closed]

Suggestion for linear actuators? Some desired specs Very fast [coompletes forward motion in 10-20 ms Just a pulse reaction needed - Can move forward with great speed Backward thrust not needed; can ...
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2answers
1k views

How do I wire Solid State Relays to a linear actuator

Sorry for the dumb question, but I only know enough to get myself in trouble.. I've searched through previous questions and haven't found an answer that dumbs it down enough for me. I'm trying to ...
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2answers
365 views

Actuator resistance

Sorry, I’m not much good at electrical work, but I’m trying to understand why this actuator I purchased doesn’t use the rated power specs. I expect this question may have been asked before, but I can’...
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2answers
1k views

How to know the right amp to power a 12V actuator?

I have an Arduino Uno. I need to use an electric linear actuator to control the movement of a joint in which I have installed a rotary encoder to know in what angles it's moving. The actuator is a 12 ...
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2answers
171 views

What is the best way automated relay switches can work with manual switches for a two way skylight motor?

I am installing a pair of skylights and considering if I could automate them with a Raspberry pi. The same could apply to windows or blinds, so I am hoping someone has done similar. Is this a safe ...
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1answer
180 views

Function to Determine Plunger Force on Solenoid Actuator

I am designing a solenoid actuator system and need help determining the kinematics. I need to know what the force from the solenoid would be as a function of the plunger's position. Would there be a ...
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1answer
65 views

Creating a linear actuator

so I am working on a project that involves opening and closing a two piece chamber made of rubber. I have to get a good seal on the chamber so no gases can pass through between the rubber pieces and ...
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1answer
113 views

Actuating Pencil To Draw Waveforms

I am looking to make a pencil whose tip moves to create a waveform as you move it across the paper.In essence, I want to be able to record a sound and then play the sound through the pencil whilst I ...
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1answer
301 views

I need help in rewiring a chicken coop pop door

4 years ago I purchased an automatic chicken pop door for my coop. It is 12 volts and the door opens at dawn and shuts at dusk by means of a photosensor. It is a home built device that works quite ...
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1answer
69 views

NO/NC AC Actuator

I'm looking to build some projector cases for a school gymnasium which is a high dust environment. I'm looking to create an enclosure with a solenoid/servo/actuator that will open the enclosure at the ...
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1answer
838 views

What is the speed of hard disk actuator arm?

There is a lot of material discussing the rotational speed of the magnetic disk in HDD but not about the rotational speed of actuator arm. What are the typical actuation speeds of the actuator in ...
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0answers
38 views

Small lock actuator controlled by single lipo

I am working on a project, in which I have a small box, in which I need it to be locked from the inside. It will have a panel on the front to enter in a code to open it. It needs to be very small, ...
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1answer
76 views

Can i use a push button switch to operate an actuator

Please forgive me if my question is just silly. Really strugling to find answers. I have bought what i belive to be a dpdt switch. It is however a push button switch. It is an 8 pole switch with 2 ...
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3answers
797 views

Is my 2 relay h-bridge safe?

I am trying to control a linear actuator using a cheap remote controlled 2 channel relay (it controls a gate for my workshop dust collector). I'm think it's as simple as connecting each relay the same ...
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1answer
139 views

Long Stroke Solenoid Actuator

I'm wondering if it's possible to create a solenoid actuator that would be very powerful, and fast enough to keep up with a human's movements, and also relatively long (roughly 7 inches). I found ...
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2answers
310 views

opening a door from a raspberry pi [closed]

I'm creating a cheap room escape in a box. The housing box has hidden doors and the Raspberry Pi inside should be able to open them at will. I've seen people using servos to open the thing, ...
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2answers
322 views

Weak and Cheap Linear Actuator? [closed]

I have a tiny tube that sprays lubricant but I need it to move between some holes in a line. The total distance is only 10 inches. So imagine the holes like this: ...
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1answer
104 views

Fast, long linear motion (about 60 cm/ 23 inches) [closed]

I'm currently researching a way to build a punch imitation (for boxing training) and for this i need a simple, fast (if it can be configurable great) and long linear motion which can handle a ...
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4answers
4k views

How to drive a linear actuator in both directions

I would like to drive in both directions my linear actuator (12VDC, 13A max). My electronic board outputs two signals (obviously, I also have GND signal): Forward: +12VDC (2A max) Backward: +12VDC (...
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1answer
138 views

How can I find a transistor that can drive a 2A actuator with 2.5kHz PWM?

I am looking for a transistor that drives an actuator, and the actuator requires 2A and 2.5 kHz PWM. I am using Arduino to generate the PWM to gate the transistor and then the transistor controls the ...
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1answer
155 views

Using Linear Actuator as 'Coilgun'

If One were to have a Linear Actuator like shown below, could you efficiently use that coil as an accelerator for said Coil gun or Magnetic Linear Accelerator. I use the picture above as it is out of ...
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4answers
640 views

Small, two-way linear actuator

I'm looking for a certain component - not a concrete shopping recommendation, but rather if this kind of device exists and what it is called. I need a little actuator that has the following ...
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0answers
125 views

Linear actuator - Wiring and control

I have to use a linear actuator in my project and according to my need and availability I found this Linear actuator MEGAMAT2. This requires 24 V supply. But I am unable to understand the pin ...
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2answers
698 views

VFD or gearbox for Linear Actuator?

I'm designing a linear actuator for a particular application, and the electric motor I'll be using will be a 1/8 HP three-phase motor. I need to decrease rotation of the motor, and my first idea was ...
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3answers
622 views

Switching between +9V and -9V (using 5V logic)

I got some linear actuators today and found out that when I give them +9V they extend and -9V makes them contract. This is easy enough to test by hand, simply by wiring the actuator up to the battery ...
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1answer
151 views

How to choose electric motor for a linear actuator?

First of all, I'm an undergrad student of Mechanical Engineering, and I'm working on a project where the main component is a type of linear actuator which I'm going to design. I will use a roller ...
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4answers
2k views

Should I use a permanent magnet inside a solenoid for an electromagnet shuttle?

I'd like to make some kind of actuator/vibrator but much stronger. I thought of using a static, tubular solenoid, driven with AC current. Inside it would be a mobile permanent magnet cylinder (...
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1answer
198 views

how can i build a cheap linear actuator [closed]

I need a linear actuator for my IOT project but how do i make one and how do i use python to control it? i saw videos of people making it with glue sticks and servos but i don't think it will be ...
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2answers
1k views

Solenoid to launch tennis ball [closed]

I am interested in putting together a tennis ball launcher. It's accuracy/precision are not important. Even varying distance by ~50% or more per shot doesn't matter (it's for my dogs). What type ...