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(...) I've said it before (several times :-) and I'll say it again: since the airtanks cannot provide consistent performance levels, in my opinion they are rubbish for most applications. You are far better off building a motorised compressor that (...) (21 years ago, 26-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) Ack! Sorry for duplicating your message there Rosco, my NNTP connection to lugnet has been a bit flaky recently which confuses me greatly. I've had a message dissappear as well, is anyone else experiencing NNTP woes? Jennifer (21 years ago, 26-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) [snip] (...) Thanks! (...) Mark Terrabain invented a single piston, single switch AND gate, but it only has one pressure output, so you have to retract the pistons with some external force like rubber bands. I invented a single pison, dual (...) (21 years ago, 26-Sep-03, to lugnet.org.us.lugola, lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) For models with a lot of cylinders I use a car tyre air compressor. I bought the slightly more expensive one tha has a variable pressure limiter and set the limiter to 20 PSI initially. This wasn't quite enough. 25 PSI was good for all but the (...) (21 years ago, 26-Sep-03, to lugnet.org.us.lugola, lugnet.technic)
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| | Re: lego tattoo
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(...) After 18 years of making the 4733 they still don't make 'em in red. At least they're not in any official set inventoried at peeron... I wonder how a technic gear would look as a tattoo, the z24 comes in red :) /Tobbe (21 years ago, 26-Sep-03, to lugnet.people, lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) I'm not sure and my bricks aren't around as I type this; Does the 1 x 1 technic brick [1] (or similar) slide over the hose end when it's connected? If so that should make a real snug fit for the hose. Perhaps some other brick can do this (...) (21 years ago, 26-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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Tobbe Arnesson wrote: > The hoses will pop-off before any damage is done due to preassure. The preassure > will also leak out in time so there's no danger there either. I verified this for myself tonight with three pumps working three airtanks and (...) (21 years ago, 25-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) The four bar linkages used for driving excavator buckets are good for doing appoximately 180 degrees motion, especially when you have to go "round a corner". The following shows an example - I'm not sure about its angular range but certainly (...) (21 years ago, 25-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) Levers are your friend! Have a look at the mechanisms used to drive the buckets on 8455 backhoe (front and back), and similar models. While these operate nowhere near 180 deg, adjustment of lengths/fulcrums may well get you closer. ROSCO (21 years ago, 25-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) Near 180 degrees maybe tough. You'll need to keep the piston attached as close as possible to the pivot point of the arm to get the maximum range. <snip> (...) Thanks for the positive feedback. I have three large pumps all attached to the same (...) (21 years ago, 25-Sep-03, to lugnet.technic)
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