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I've been thinking a lot lately about electrically activated (as opposed to
manual) pneumatic valves. I've seen several designs on the net where someone
has taken a regular LEGO manual valve, and attached a motor. That's clever, but
I'm wondering if there are any other designs floating about. Ideas that have
come to mind:
- A pinch valve made by pinching shut a pneumatic tube with a wheel or lever
attached to a motor
- A from-scratch valve made out of LEGO parts (probably tricky to get that air
tight, but might be good enough)
- A real-world (commercial) valve actuator adapter for use with LEGO (tricky bit
here is finding one for a reasonable price)
Have you seen any of these, or something else entirely, to control the flow of
air with standard LEGO 9V electronics?
Thanks,
- Joe
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Message has 5 Replies:
 | | Re: electric pneumatic valve actuators?
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| (...) How about one operated by folding or bending the pnematic tube itself (the same way you can kink a garden hose to turn it off temporarily while waiting for your sister to come around the corner of the house and... oh, never mind). I suspect (...) (20 years ago, 26-Aug-04, to lugnet.technic)
| | | Re: electric pneumatic valve actuators?
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| (...) What do you feel is a reasonable price? In the next week or two I should have the first prototype built of a pair of commercial solenoid valves adapted for LEGO/RCX usage. They'll be 9v, and around 1.1 watts. It will be 2 3-way valves, one for (...) (20 years ago, 26-Aug-04, to lugnet.technic, lugnet.robotics)
| | | Re: electric pneumatic valve actuators?
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| (...) I got thinking about this. My first thought was to use a worm gear and a slip gear to pinch and unpinch the tube. This would probably work, but would not give you what you want. You need a valve that will exhaust the flow to a different path (...) (20 years ago, 26-Aug-04, to lugnet.technic)
| | | Re: electric pneumatic valve actuators?
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| (...) In my Injection Molding Factory I have built the equivalent of an electrically operated 3-way spool valve. It's expensive. I spent much time trying to simple it up, but a 3-way valve is not easy. Look here: (URL) the same page there is a cute (...) (20 years ago, 27-Aug-04, to lugnet.technic)
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