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Questions tagged [linear-motors]

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1answer
43 views

Can linear actuators be moved manually?

I've watched a few videos explaining how actuators work and it seems to me that a regular, non-blocking, actuator would freely move if not powered. But theory and practice are rarely the same thing. I'...
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0answers
23 views

Is it possible to simulate the electric power output of a linear alternator using finite element analysis software?If yes, which?

We need to build a small (1-2W) linear alternator for a project in engineering school. Is it possible to use finite element software to finetune our design instead of actually building real life ...
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0answers
23 views

How do you determine the Maximum Radial Load in Linear Actuators

should the maximum radial load be considered? A linear motor has a Maximum Load of 500N and a 300mm Stroke Length. There will be instances that the Linear Actuator will have a Vertical Force while ...
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0answers
18 views

Hydraulic Cylinder comparison to electric Linear Actuator

I am trying to build a juice press using an electrical linear actuator, instead of a hydraulic car jack (bottle type). If I build it with the hydraulic cylinder I would need a 5 Ton bottle, which ...
2
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0answers
60 views

Performance of RC car under different gear ratio, measured data vs hypothesis

Assuming the driveshaft of the rear wheeled drive RC car follows the linear DC motor theory for stall torque and no-load RPM, also voltage supplied is constant and no inductance as well. Note: the ...
0
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1answer
48 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 ...
1
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1answer
55 views

Need to produce vibration amplitude of 200 um (approx) at natural (resonant) frequency, can be any frequency between 100 to 150 Hz

In order to conduct study, I need to produce controlled vibrations with amplitude (maximum) approx 200 um (micro) at frequency between (100-150) Hz. Vibration amplitude must be controlled with input ...
2
votes
1answer
104 views

Voltage controlled linear actuator with spring back

I have a machine/robot that has a manual joystick to control forward and reverse. The joystick is connected to a mechanical linkage system that goes forward/backward, which than controls a hydraulic ...
2
votes
1answer
42 views

How to vary the force output of a motor while stalled?

I want to provide a gradual increase in force provided to a piston (perhaps 0-100N over the space of a couple of seconds maximum), up till the point it begins moving, and then drive it to a varying ...
4
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1answer
213 views

What is this contraption?

If this is the wrong place for this question, please migrate it to someplace where it's more suitable. So one of my old teachers from my previous school sent me a contraption to try and figure out ...
2
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1answer
526 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 ...
8
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3answers
4k views

Reading stepper motor datasheets to get torque and speed

I don't understand how to use the information in a stepper motor datasheet to understand how much torque it can generate. I was going to do a simple board and try to lift a small weight as an example ...
5
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2answers
1k views

How does a rodless electrical linear actuator work?

I want to pull some weight horizontally and for that i have settled for a linear actuator. The actuator should pull some weight as it moves back and forth as the gif shows. There are linear ...
4
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1answer
214 views

Magnetic levitation [closed]

I am currently considering turning my fascination with magnets into a diy activity. How feasible is it for a hobbyist to construct a working model of a maglev device? I'm looking to build something ...