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(...) I, um, have one that was filled with water back then... *cough* It doesn't work so good any more. ;) - Ben. ---...--- Ben Williamson benw@pobox.com (URL) (25 years ago, 9-Aug-99, to lugnet.robotics)
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(...) Works for me. I'll even pay for shipping. :-) Just kidding. I think we need to see instructions for the tester! That way we can all reproduce the results. But, maybe we need to compare several testers to see how much variability there is (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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Larry Pieniazek <lar@voyager.net> wrote in message news:37F4B2C6.5A1298...ger.net... (...) For the development of my pressure sensor I used a digital pressure gauge that you can buy for checking tire pressure. ($8.00 at KMart) It requires removing (...) (25 years ago, 1-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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Michael, Another great post! You should be in the "LEGO Hall of Fame" along with Dave Baum and Mark Overmars! Thanks for your many contributions, - Nick - (...) (25 years ago, 1-Oct-99, to lugnet.robotics.rcx)
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(...) Well, people, I think we'd better get down to some serious business... (...) Agreed. Building instructions on the way soon as I can see whether improvements are required as as been variously suggested:a. use an angle sensor b. use a pressure (...) (25 years ago, 2-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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| | Re: RCX Controlled Air Compressor Tester
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(...) Here are thoughts on the variability in the tester issues posed. The most important sources of variability in the RCX Controlled Air Compressor Tester and precautions to be taken are as follows: 1. The compressor under test itself may be (...) (25 years ago, 4-Oct-99, to lugnet.robotics, lugnet.build, lugnet.robotics.rcx)
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(...) So I guess I should use lubricants made especially for plastic and rubber huh. Else you should probably just leave it alone. I wonder... How bad will the get screwed up? Anyone know? I mean if you use say machine oil(what I use) and it will (...) (25 years ago, 4-Oct-99, to lugnet.robotics)
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(...) Set up a pump, a valve, and a cylinder like this. pump------Valve---...---cylnder \___...___/ Then put a few drops of oil into each tube AFTER the valve. Turn the valve so the cylinder goes up, and push the pump. Then set the valve to go down. (...) (25 years ago, 4-Oct-99, to lugnet.robotics)
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| | Lubricating Cylinders
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(...) I've noticed that some of my cylinders are a bit "sticky" or sound like they are grinding. The small cylinders and pumps have a lubricant on them already. On a side note, I'd be careful about what kind of oil I put into these cylinders, since (...) (25 years ago, 4-Oct-99, to lugnet.robotics, lugnet.build)
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(...) Any special type of oil? I've been hesistant about using oil. As I understand it, there is rubber inside the cylinder and oil affects rubber. I'll give it a try! (25 years ago, 4-Oct-99, to lugnet.robotics)
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(...) I would also restrain from using oil. If you open a hand pump (the easiest pneumatic to open) you notice that there is a clear grease lubricating the piston. I would guess this is some type of silicone product. I don't think petroleum oil is (...) (25 years ago, 4-Oct-99, to lugnet.robotics)
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(...) Thanks, I would certainly want my pneumatics to last. Wish the pumps and cylinders could come with a little leaflet on their proper use and care, together with a small tube of the approved lubricant. (25 years ago, 4-Oct-99, to lugnet.robotics)
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| | Re: Lubricating Cylinders
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> > > (Anyone found a safe and effective lubricant for them?) Graphite? As is used in locks? (25 years ago, 4-Oct-99, to lugnet.robotics)
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(...) Has anyone actually contacted LEGO and asked for this? I remember when I was a kid and one of those copper thingies (I don't know the correct English word word) which picks up the electric power from the track in the middle of the old train (...) (25 years ago, 4-Oct-99, to lugnet.robotics)
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(...) Pneumatics have been around for 15 years. Anyone oiled them back in 1984? And also has some un-oiled ones with them? Well, one of my cylinders has already been filled with oil. So I'll just have to wait 20 years. Let me see, that'll be 2019. (...) (25 years ago, 5-Oct-99, to lugnet.robotics)
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(...) Er, I thought water is "hydrolics". Anyway, you've advanced our meagre knowledge concerning Lego pneumatics, namely you've confirmed what doesn't work. But we're still much in the dark about what will work. Guess we'll just have to wait for (...) (25 years ago, 5-Oct-99, to lugnet.robotics)
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I have some of the original pneumatic cylinders with only one inlet. They have been used for various non Lego uses. While coming back from the dark ages, I have discovered that all three still work once they have been pumped once by had. They can (...) (25 years ago, 7-Oct-99, to lugnet.robotics)
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(...) But do you reckon the seals are the same? They may use different material now... BTW, does anyone have any good uses for the old cylinders? They are pretty feeble when pulling (ie relying on "vacuum"), and seem (IMO) to be less well-built than (...) (25 years ago, 7-Oct-99, to lugnet.robotics)
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I'm using one of my old cylinders for my cut-off pressure switch. This only uses one of the inlets any way. They are OK for once only trigger events. They can also be used to transfer motion from one place to another by simply connecting two with (...) (25 years ago, 7-Oct-99, to lugnet.robotics)
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