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(...) Mark, I think the subject of pneumatic sequencing is strong enough to stand by itself as a chapter. Feel free to read my writeup on the subject (URL) (...) (21 years ago, 9-Apr-04, to lugnet.technic, lugnet.books)
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| | Re: Pneumatics book?
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(...) That would be my fifth book, and my second that contains pneumatic models. I'd love to do more models based on a single 8455 set. It has enough switches to make a half adder, and some cool walkers. It is a challenge to live within the (...) (21 years ago, 9-Apr-04, to lugnet.technic, lugnet.books)
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| | Pneumatics book?
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(...) Well, there are books about Lego Mindstorms and now a book about Lego trains, both by AFOLs, so I don't see why not. Chapters may look like this: 1. Basics. Components and simple system. 2. Larger basic systems, up to Backhoe Loader (...) (21 years ago, 8-Apr-04, to lugnet.technic, lugnet.books)
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| | Re: LEGO at the Bauma 2004 construction equipment trade fair
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(...) Wow! I wish I could have been there. I'd feel like a kid again roaming through an immense toy store. Thanks for posting these pics! (URL) This one> is a little disturbing :-) (...) Oh yeh! See you on the 23rd, Beat! -TJ (21 years ago, 9-Apr-04, to lugnet.technic, FTX)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) Mark, I thought this one through, and I get it. I can see how it works. The solution works equally well as my solution. I don't think mine is any more or less complicated, just different. Less hoses, more T's and other technic parts than (...) (21 years ago, 9-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) I'd love to see a picture of your reversor, as verbal explanations by themselves are often much harder to comprehend. (...) Again, I'd like to see this. My pneumatic mux that can act as a polarity reversor, can just as easily be used for an (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) The amount that a fluid can be compressed varies with the fluid, the temperature, the pressure and other things. Water can be compressed too much - that's why trucks don't use it for their hydraulic systems. Hydraulic fluid is special oil that (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) I get the impression you've complicated things by putting different switches at different lever angles. My reverser idea puts the switch lever pivots 16mm apart, all in a line with 2-beams between: BSBSBSBSB along a beam of length 17 holes, so (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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In lugnet.technic, Kevin L. Clague wrote: <snip> (...) Actually this multiplexer is more efficient because it uses less parts: (URL) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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<snip> (...) Hi Mark, I've thought about this in the past, and ruled it out because it is such a specialty. Do you think there is a big enough market to justify a book on this topic? Kevin (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: LEGO at the Bauma 2004 construction equipment trade fair
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Thank you very much for posting these pictures! must have been a great convention to attend. i especially liked the series of pictures of the red Liebherr crane. bob (...) Bob Kojima ko@fial.com Fial Incorporated Telecom Monitoring Solutions 4343 SW (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) It is my understanding that fliuds cannot be compressed. So a cylinder hooked to another cylinder with fluid in between (assuming no leaks), would always provide 1 to 1 movement. I'm not an expert in hydraulics, but I think your claim above (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) I have created a pneumatic polarity reversor using four pneumatic switches. I did an analysis and my pneumatic multiplexor works as a hydraulic switch that does not have a free release. (URL) above picture contains two pneumatic multiplexers. (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: LEGO at the Bauma 2004 construction equipment trade fair
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Hi Beat, (...) that doesn't work here, can't you just put the description on the page? Jürgen (21 years ago, 8-Apr-04, to lugnet.technic)
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| | LEGO at the Bauma 2004 construction equipment trade fair
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Hello Friday and Saturday 2 and 3 April I have been in Munich visiting the worlds largest trade fair of any kind, the Bauma construction equipment show. And as I know that there are a lot of crane and construction equipment fans here on (...) (21 years ago, 8-Apr-04, to lugnet.technic, FTX)
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| | Re: pneumatic cylinder: why not hydraulic ??
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Not alone thinked about it a while back,currently studing fliud power and in the fluid power industry (...) Lego pneumatic cannot be used for hydraulic's period! Nor will there be such a thing put out by lego there in the toy industry not heavy (...) (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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purpledave@maskofdestiny.com (Purple Dave) wrote in <Hvtrvs.sBv@lugnet.com>: (...) And where would you leave all that fluid? Fluids aren't compressible (yeah, they are, but so much less than air that I'm close enough for government work). (21 years ago, 8-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) Not necessarily. Assuming both cylinders are the same size, a full pump cylinder stroke will only result in a full working cylinder stroke if the working cylinder doesn't have significantly more resistance than the pump cylinder. If the (...) (21 years ago, 7-Apr-04, to lugnet.technic)
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| | Re: pneumatic cylinder: why not hydraulic ??
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(...) One key thing about hydraulics has always been "avoid leaks". To switch the fluid, just invent something I've wished for for years - the reverser switch. This switch has four ports, used in opposing pairs. Clockwise in a circle they would be (...) (21 years ago, 7-Apr-04, to lugnet.technic)
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| | Re: MStamp
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(...) Yes, eventually that will happen. The tricky part is actually buying the stamp. :) I'm a little worried that the ink will drip out of the ink pad since it's inverted but I'll just have to cross that bridge when I get to it. As for the real (...) (21 years ago, 7-Apr-04, to lugnet.robotics, lugnet.technic, FTX)
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