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View Full Version : Telescoping pillar actuators..how do they work?



Doctor Robotnik
06-27-2009, 06:36 AM
I've seen telescoping actuators that increase their length 3x, and was wondering just how is that accomplised? I've looked around on the internet and only found the manufactures, who I am sure rather sell me one then dilvulge how to make one. ANything you could tell me would be well appreciated.

ScuD
06-27-2009, 08:38 AM
I don't know exactly which ones you're talking about, I know standard linear actuators like these :

http://www.ultramotion.com/images/bugcut.gif

but these don't get nowhere near 3x their length.
Do you have a link of what you mean?

Doctor Robotnik
06-28-2009, 02:15 AM
Something like this....

http://news.thomasnet.com/images/large/013/13518.jpg

robologist
06-28-2009, 10:52 AM
This Danaher link (http://www.danahermotion.com/website/eng/eng/products/actuators/linear_actuators/lifting_columns/movoact_tc16.php) mentions using 2 lead screws internally. I could see one belted/geared to the other so that both twist their nut up/down together.

Just was thinking, how would that work? Unless one had a very wide gear for the other slid up? One lead would have to rise as the other lead pushed one section up, and would need to be rotated to push its section up. Need a cut-away somewhere.