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 Technic / 14602
    Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
   A while ago I saw an electric robot on TV that had 6 legs in 2 rows of 3 and moved one leg at a time forwards (lift, forward, down), then all back together. I thought this is an ideal application for Lego pneumatics. I don't still have it built, but (...) (19 years ago, 13-Sep-05, to lugnet.technic)
   
        Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
   (...) Hi Mark, Now I know what to build next..... a four legged walker that lifts one leg at a time. On paper it looks like I can get one made for 1+2n pistons and 2+4n switches. This assumes that legs mechanically lock when weight bearing. I don't (...) (19 years ago, 13-Sep-05, to lugnet.technic)
   
        Re: Pneumatic "One Leg at a Time" Robot Circuit —Sigurd van Strakenburg
     (...) hi, why do you wanne build a thing that lifts one leg a time?.... i did it but it dont have any advanges. it isn't much more stable. it isn't faster (my cat 343 was not to slow) but stil i don't see any inprovments. the only thing is that it (...) (19 years ago, 13-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Rob Hendrix
       "sigurd" <sigurd18@hotmail.com> wrote in message news:IMrs0L.18LJ@lugnet.com... (...) Didn't the Star Wars AT-ATs move one leg at a time? (Going by memory sometimes produces weird results) Rob www.brickmodder.net (19 years ago, 13-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
     (...) Hi Sigurd, Maybe I can do it with fewer pneumatic parts? Kev (19 years ago, 13-Sep-05, to lugnet.technic)
   
        Re: Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
     (...) (SNIP) (...) This one has moved away from my usual differential logic. Each leg module has a flip-flop for the foot and hip, which does 3 out of 4 movements and waits for the fourth to be done all legs together. I see how single switch AND (...) (19 years ago, 13-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
     (...) I understand that leg 0 is moved up forward then down, leg 1 is moved up/forward/down, leg2 is moved up/forward/down, leg 3 is moved up/forward/down, and finally leg 0, leg 1, leg 2 and leg3 are moved back. I don't quite understand why you (...) (19 years ago, 13-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Rob Hendrix
     (...) How many different 'designs' could one come up with for an AND gate in LEGO pnuematics anyway? -Rob www.brickmodder.net (19 years ago, 14-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
      (...) Not many efficient ones, but it very much depends on the type of logic, whether it's differential (a pressure hose and a leak hose to a cylinder) or single (a few switches daisy-chained for an "all legs up" condition) If anyone were to patent (...) (19 years ago, 14-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
     (...) I've come up with three AND gate technologies so far. Also I've come up with three OR gate designs too (those are differential output, plus I have a single pressure OR too). I've only come up with one differential XOR and a single pressure (...) (19 years ago, 15-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
     (...) There's probably no limit to the number of designs, but only a few will have a situation where they are the best one. Different designs are better in different situations. Of the differential output designs that provide output hoses to both (...) (19 years ago, 17-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
     In lugnet.technic, Mark Bellis wrote: <snip> (...) Is there such a thing?!?! :^) Kev (19 years ago, 17-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
     (...) An effect of too many trains? Perhaps a one track mind :-) Mark (19 years ago, 17-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
     (...) I was referring to "too many trains"! I believe any and all claims of too much LEGO to be false. Assuming your trains are all LEGO, then I beleive your "too many trains" to be false also! (...) This too. (...) Kev (19 years ago, 17-Sep-05, to lugnet.technic)
    
         Re: Pneumatic "One Leg at a Time" Robot Circuit —Mark Bellis
     (...) Haha! Yes, I could never have too many trains, but a bigger house would be an advantage since I could run 16 8mm scale trains on a big enough layout. I have a long-term plan for a warehouse full as a museum :-) However, too much concentration (...) (19 years ago, 18-Sep-05, to lugnet.technic)
   
        Re: Pneumatic "One Leg at a Time" Robot Circuit —Kevin L. Clague
   (...) For a hexapod, I've revised the design and implemented it. The cost savings were not quite as high as I thought, but...... Pistons = 2n+1 (13) Switches = 5n+2 (32) I'll be posting pictures, movies, timing diagrams and schematics in a different (...) (19 years ago, 3-Oct-05, to lugnet.technic)
 

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