Subject:
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Motorized pneumatics
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 10 Aug 2010 15:50:38 GMT
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Viewed:
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53423 times
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I haven't posted in this forum since 2008 and haven't built much, but upon
looking at the new 8043 Excavator set at Toy's R'Us, it became apparent that
although the new linear actuators dramatically simplify the process, they are
not the only solution. I call them linear actuators because they are typically
motorized and they extend/retract. It is possible to do the same with
pneumatics....if you add a differential into the system. By doing this simply
forwarding or reversing the motor will extend/retract the pistons.
http://www.brickshelf.com/cgi-bin/gallery.cgi?f=440654
This is not the ideal execution of the idea and there have undoubtedly been
others who found a different way to do this same thing, but it shows the general
idea. One could obviously incorporate a bigger motor, a different gear ratio,
or even shrink the size of the assembly.
Hopefully this idea will help those of you who still want to use pneumatics do
so. Sorry the youtube video is fuzzy.
-Nathan Bell
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Message has 2 Replies:
 | | Re: Motorized pneumatics
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| (...) Hi Nathan, I really like your solution. I've seen a number of automated vales, but almost all had the drawback that they could generate considerable stall load on the motor. This solution appears to be much more efficient. Jetro (14 years ago, 11-Aug-10, to lugnet.technic)
| | | Re: Motorized pneumatics
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| (...) Hi Nathan, Don't you love differentials? Smart gearboxes..... I invented the same pneumatic switch/compressor solution years ago, and its great! As you pointed out, how fast the switch flips all depends on how hard it is to pump the pump. (...) (14 years ago, 14-Aug-10, to lugnet.technic)
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