Subject:
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Re: Lego pneumatic systems overview?
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 25 Sep 2003 23:11:33 GMT
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Viewed:
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2038 times
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In lugnet.technic, Brian Reynolds wrote:
> Kevin L. Clague wrote:
>
> > I don't know what the maximum allowable pressure is, but 30 PSI is probably a
> > good upper bound.
> >
> > It depends on which direction you are trying to move the weight...
>
> 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 of the arm will be a fairly sizeable
> weight of bricks and plates. So my current musing is how to make the
> relatively short reach of the extended cylinder move the whole assembly
> through that range of motion and then to build the arm base structure
> and focal point strong enough that the whole thing doesn't come apart
> under the lopsided weight change.
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
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Message has 1 Reply:
 | | 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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Message is in Reply To:
| | Re: Lego pneumatic systems overview?
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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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