Subject:
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Re: Using airtanks on 8868
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Newsgroups:
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lugnet.build
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Date:
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Mon, 20 Sep 1999 08:53:14 GMT
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Viewed:
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866 times
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"Selçuk <teyyareci>" <sgore@nospam.superonline.com> writes:
> But in the case of pneumatics, the working fluid is a compressible
> one (even compressed air) and you practically cannot control the
> stroke of a piston, other than using mechanical constraints.
Sure, but in the original configuration of 8868, you have more control,
as you can turn the compressor on and off for short durations and yield
relatively small changes in the stroke of the cylinder. Adding an air
tank really makes this much worse, as you will have virtually no control
at all when the pressure in the air tank is high. This was the point I
wanted to make with my post.
Linc Smith proposed to alter the T-joints so that they became much more
narrow/tight. He used some parts from disposable syringes, I believe.
This way, he could control the movement of the cylinders more precisely
even when the pressure in the air tanks was high.
Fredrik
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Message has 1 Reply:
 | | Re: Using airtanks on 8868
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| well, I understand all this, re current LEGO valves with air tank yeilds an "on or off" action with the cylinders. My concept was if we could build ( out of LEGO) a better way of metering the air flow. Mechanical stops would be one way of limiting (...) (25 years ago, 20-Sep-99, to lugnet.build)
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Message is in Reply To:
| | Re: Using airtanks on 8868
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| Hydraulic and pneumatic systems work differently. In the first one, your working fluid is an incompressible one (liquid oil, generally) so you have the full control of the stroke length of any piston.But in the case of pneumatics, the working fluid (...) (25 years ago, 20-Sep-99, to lugnet.build)
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