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Author Topic: inexpensive linear actuator needed  (Read 4078 times)

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Offline dmehlingTopic starter

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inexpensive linear actuator needed
« on: July 29, 2007, 12:12:57 PM »
I need linear actuators for two different functions.  I need one to elevate a platform approximately 4 inches, weighing between five to 10 pounds and I need an actuator to slide a platform horizontally up to 3 feet, weighing about five to 10 pounds as well.  I have done considerable searching for actuators, but most of the ones I've come across are for industrial/commercial uses costing at least $100 for each actuator.  My price range would be about $15-$25 per actuator.

Offline hazzer123

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Re: inexpensive linear actuator needed
« Reply #1 on: July 29, 2007, 12:28:27 PM »
Have you thought about using a motor with a screw thread coupled to the shaft? This would do the job and be inexpensive.

Harry
Imperial College Robotics Society
www.icrobotics.co.uk

Offline dmehlingTopic starter

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Re: inexpensive linear actuator needed
« Reply #2 on: July 29, 2007, 02:02:52 PM »
That was definitely one of the options I considered, but again I had difficulty finding an inexpensive version of a threaded screw drive.  Just tell me where I can find  one.

Offline hazzer123

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Re: inexpensive linear actuator needed
« Reply #3 on: July 29, 2007, 03:14:07 PM »
I have allready made use of this idea in a past project, and i simply used a screw thread bought from a local DIY shop and a fitting nut which was attached to the platform i wanted to move. It worked fine.
Imperial College Robotics Society
www.icrobotics.co.uk

Offline Admin

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Re: inexpensive linear actuator needed
« Reply #4 on: July 30, 2007, 07:15:27 AM »
What about a cheap DC motor that pulls a string(s) attached to an overhead pulley?

That will give you linear motion of any distance, plus a mechanical advantage so you can use a cheaper motor.

As an added bonus, pulleys have high efficiency (above 95%).

 


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