Questions tagged [actuator]

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Deciding between Electric or Hydraulic Actuators for a Dynamic Load of around 4 kN to 6 kN

This is a project regarding linear actuators for a 4 Wheeled Robot, with spider like hinged legs. The first question on my mind was to figure out is if a hydraulic system has any weight to Force(...
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30 views

Solenoid stroke limits

Im new to rotary solenoids and I had like to understand the definition of stroke. For example, some rotary solenoid has in its technical information a parameter called stroke options and it says 25-...
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8 views

Looking for a clamping actuator or back-driveable DC motor

I am a university student attempting to build a haptic feedback glove, and while I do have a main design using electroadhesion, it is a bit finicky, thus I am looking for alternatives for design. ...
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30 views

Linear actuator calculations

I'm building a motorized standing desk and am looking into what to use for the linear actuators. I'm targeting a stroke of 450mm and a lifting force of 100kg. I found some Linear Actuator on ebay that ...
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0answers
80 views

Shape memory alloy fibers with low Young's Modulus?

I am wondering if there exist any species of shape memory alloy fibers with low Young's Modulus at room temperature, for an application I'm working on. So far I've played with Flexinol, but it is a ...
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11 views

Shape memory alloy fibers with low Young's Modulus? [duplicate]

I am wondering if there exist any species of shape memory alloy fibers with low Young's Modulus at room temperature, for an application I'm working on. So far I've played with Flexinol, but it is a ...
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1answer
43 views

shock-resistant electromechanical linear actuator?

I was wondering, if there is a shock load resistant electromechanical actuator that can withstand powerful impacts? Is there an electromechanical counterpart for pneumatic cylinders that is as ...
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3answers
151 views

air-dropping actuator for a small drone

I'm planning to build an air-dropper for a small drone - a device to release small payloads hanging under the drone. This is a commercial example of such a system, used with a much bigger drone - for ...
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0answers
20 views

Searching for a High Speed Actuator for a simulator

I am currently planing to build a consrtuction for a simulator. My simulator seat should be able to fall like 30cm and afterwards move to the starting position . The falling should be as natural as ...
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1answer
54 views

Solar panel actuator control

I'm looking to design a system that can control a solar panel through an electrical actuator for a range of motion of -45 to +45 degrees for maximum solar exposure. The panel will be mounted on a 10 ...
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1answer
36 views

What (if any) are the engineering limitations for producing “simulation” exoskeletons

To clarify the title since it cannot be said within the word limit: A "simulation" exoskeleton, is an exoskeleton that doesn't exist to support a disabled user's movement or to help someone carry ...
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0answers
43 views

Commercial electric motor with integrated torque sensor and torque control [closed]

Are there any commercial solutions for electric rotary motors with integrated torque sensor and torque control? I'm only aware of www.sensodrive.de which are essentially the drives used in the DLR/...
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11 views

Why does my piezoelectric actuator stick at low temperatures?

I use a piezoelectric actuator on an experimental set up. At low temperatures (Lower than 0 Celsius), the piezo will freeze. Meaning, it will actuate about half way, and then stop moving. Other than ...
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63 views

What is the correct mathematical approach to this linkage problem?

I have a linear actuator with 52 millimeters of travel. I have a set of linkages with specific dimensions as shown in the images below, to which this actuator will be attached. The REF dimension is ...
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1answer
39 views

Pneumatic actuator capable to achieve 5m/s?

Is there a pneumatic actuator capable to achieve 5m/s and will be good idea for constant work? I know SMC have up to 3m/s, but I can't find faster.
3
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1answer
55 views

Electric linear actuator

I want to build a pod. I am thinking to put a linear actuator on its lid. but my problem is, since linear actuators have this self locking mechanism, if it will be brown out, I cant open or close the ...
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1answer
46 views

Using linear actuator in the limited space

What is most effective way to apply linear actuator to move a lift within a small sized space? I.e. for example, for 14", which is total 820mm, to move a 330 mm lift in 740mm height box (width and ...
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2answers
2k views

How to convert 7.62cm linear motion to 150-180° rotary motion

I need to convert 7.62cm/3in linear motion from an actuator to 150-180° (150 is minimum) rotary motion. I am aware of the existence of gears, but would probe here to see if there is some simpler ...
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1answer
47 views

How to provide conditional locking to drawers?

I am designing a device in which I want to lock each drawer until it's time to open them. Let's say that there are 4 compartments in the device. Each compartment needs to be programmed to open at a ...
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0answers
30 views

Can a cellulose sponge be used as an actuator to shut off flow of water temporarily?

In non-recirculating hydroponic systems, we want to fill containers with nutrient rich water let's say up to an inch, let the plants take up the water , give the plants some air time for a few hours, ...
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2answers
125 views

How can I build and maintain an accurate pressure on a fuel line without using a fuel pump?

Background I am building an engine from scratch for the sole purpose of becoming a better mechanical engineer--I'm currently a second year undergrad. The engine I'm designing is a single piston 4-...
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1answer
61 views

Vertical Linear Actuator Sway Movement

I'm designing something with a vertical linear actuator. It is a quite large actuator lifting a load. I'm anticipating sway from the actuator as it moves up and down so I'm creating a support ...
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0answers
39 views

What type of acturator with motor to choice for measurement with step = 0,25 μm?

I need to select some linear acturator or build it. I see it as: On green platform there is pink device. This device must be measured. For this purpose we need to choose linear acturator with ...
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1answer
473 views

Do linear actuators need to stay powered once in place? If not, how can I lock them?

I want to build a small remote-controlled submarine, and have been thinking about how to handle the ballast tanks. The simplest option seems to be a piston shaft, which fundamentally needs some kind ...
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3answers
152 views

Understanding net torque from an actuator

This will probably sound like a silly question, but here goes.... Let's say I have an actuator, with a torque rating of 1 Nm. I then connect it to a wheel, which starts rotating at a constant ...
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2answers
218 views

Actuate a tilting platform from a single point

I would like to be able to tilt a platform (the green cuboid below, pivoting around the red point) from a single solenoid (one of the blue cylinders below). The solenoid cannot move (other than the ...
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2answers
318 views

Pneumatic Actuators - System Reversibility. Is it possible to use an actuator to store energy?

I'm very much new to pneumatics and I was wondering if there was such a thing as a reversible pneumatic actuator? I'm designing a system that has to be lightweight, pneumatic and use a mechanical ...
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1answer
114 views

Which is more durable in sandy desert conditions: electric motors or hydraulic pistons?

If we have a tracking system placed in a tough desert environment with occasional sandstorms and temperatures that go as high as 50C, which actuator would be better: a hydraulic piston or an electric ...
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2answers
214 views

What type of liquid flow control could this device use?

I am trying to figure out what kind of device is being used to stop and start the flow of liquid inside this device. Below is a link to the device. It looks too small to be a solenoid or a pump. How ...