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(...) What I'm currently thinking about is a mechanisim that will move an arm that's hinged at one end through a near 180 degree arc before it comes to a rest and then to have the reverse switch pull the arm back to it's initial position. At one end (...) (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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| | 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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(...) 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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(...) 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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(...) This post explains the recent wonkyness with Lugnet: (URL) (21 years ago, 26-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) Which explains why I got 34 messages after only being gone since yesterday morning... ~Mike (21 years ago, 26-Sep-03, to lugnet.technic)
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| | Re: Lego pneumatic systems overview?
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(...) No problem Jen. And you did value add with the link, I think that counts as extra information ;) ROSCO (21 years ago, 26-Sep-03, to lugnet.technic)
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