Subject:
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Re: Motorized pneumatics
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 14 Aug 2010 22:50:13 GMT
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Viewed:
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51302 times
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In lugnet.technic, Kevin L. Clague wrote:
> In lugnet.technic, Nathan Bell wrote:
> > 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
>
> 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.
>
> Using the larger pumps decreases the time needed to flip the switch, but they
> are not as efficient (overall) as using the small pumps.
>
> Life is full of trade offs!
>
> Kevin
I guess great minds think alike! Yeah it works well so far. Right now I'm
building my own version of the new excavator with that same system. The thing
to remember is to make sure the axles going to the switch can turn freely. I'll
post some pics of my progress so far.
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Message is in Reply To:
 | | 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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