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 Technic / 11293
  Re: Lego pneumatic systems overview?
 
(...) 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)
 
  Re: Lego pneumatic systems overview?
 
(...) 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)
 
  Re: Lego pneumatic systems overview?
 
(...) 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)
 
  Re: Lego pneumatic systems overview?
 
(...) 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)
 
  Re: Lego pneumatic systems overview?
 
(...) 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)
 
  Re: Lego pneumatic systems overview?
 
(...) This post explains the recent wonkyness with Lugnet: (URL) (21 years ago, 26-Sep-03, to lugnet.technic)
 
  Re: Lego pneumatic systems overview?
 
(...) Which explains why I got 34 messages after only being gone since yesterday morning... ~Mike (21 years ago, 26-Sep-03, to lugnet.technic)
 
  Re: Lego pneumatic systems overview?
 
(...) 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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