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Linear Actuator DC driven, mechanical operation inquiry

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Forum topic by Chris posted 01-19-2013 03:41 AM 841 views 0 times favorited 3 replies Add to Favorites Watch
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Chris

188 posts in 2739 days


01-19-2013 03:41 AM

I have a 12 VDC driven Dayton brand linear actuator that is designed to push a rather significant load. I purchased the linear actuator some time ago and it was purchased new. It has been in storage out of the elements and such for some time. I did notice that when i first tested it out immediately following that purchase that the piston rotated clockwise upon extension and counter-clockwise upon withdrawal of the piston back into the housing. Maybe not in that exact direction I cannot recall, but the fact is that it ‘rotates’ when operated.

I had just retrieved the Dayton actuator from its hiding spot a few weeks ago for I had a gentleman that was interesting in purchasing it. I simply never used it for what it was that I wanted to and never thought much about it. I had assumed since it was new upon purchase that the actuator was designed to do this and would lock up and push in and out -straight when placed under a load or the end of the piston was fixed. Of course, you cannot hold same with the human hand to achieve this.

So it was, the guy thought I was trying to pull the wool over his eyes when I mentioned this aspect. He decided never to purchase it and thus has got me wondering. Is this the typical operation of these actuators, i have dealt with hydraulic and pneumatic pistons quite often, in my time but just never dc voltage driven linear actuators. So I am really unfamiliar with whether or not this is normal for them? I thought he being much more my elder, consolidated with the fact that he portrayed to know so much about linear actuators that he might just know what he was talking about. Thus, i began to doubt my original assumption of its operation.

Can anyone advise?

-- Chris Harrell - custom callmaker "Quacky Calls" Eastern NC. http://www.quackycalls.com


3 replies so far

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TopamaxSurvivor

14742 posts in 2329 days


#1 posted 01-19-2013 04:52 AM

Not sure about that one, but I remember something like that happening on no load, but it just went straight without turing when loaded. Been many years ago!!

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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oldnovice

3761 posts in 2021 days


#2 posted 01-19-2013 05:05 AM

I am not familiar with this particular linear actuator but I did at one time use a polynoid linear actuator which doesn’t have any rotatary component to its actuating but I it also doesn’t have much force until it reaches the end of travel and then it is totally immovable!

Polynoid linear actuator

You can see that the Polynoid looks a little different as it looks more like a large solenoid! The Dayton linear actuators look like a motor with a tube beside it where the screw mechanism is located.

Dayton linear actuator

-- "I never met a board I didn't like!"

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Chris

188 posts in 2739 days


#3 posted 01-20-2013 01:40 AM

Thanks guys, perhaps someone will chime in that is familiar with this – Chris

Here is a picture of mine.

 photo P1050675.jpg

-- Chris Harrell - custom callmaker "Quacky Calls" Eastern NC. http://www.quackycalls.com

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