Subject:
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Re: pneumatic switch control
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 22 Apr 1999 21:42:12 GMT
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Viewed:
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1049 times
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In lugnet.robotics, Joel Shafer writes:
> > Now I need to find a way to control two or more pneumatic switches with a
> > single motor, in both directions!
>
> I've been thinking about this a lot...
>
> What about using a differential to separate motor direction output.
> Turning one direction could control one switch and turning the other could
> control the other switch. The switches could be controlled in a cyclic
Rather than that, how about triggering one switch automatically at the
end of travel of the other? For instance, you won't dump your bucket on
the front end loader until it is a max height. Have the motor control
the lift are with a sensor switch to tell it when its half way up so that
it'll stop before full rise (hopefully), then when you want to dump it,
trigger the switch again to full on and when the bucket reaches the top,
it triggers the other switch to dump it and reverses the switch when dropped
back down.
Still sounds Rube Goldberg.
> What do you think? sounds like another Rube Goldberg contraption :)
I like the idea of cycling through all settings in one direction, but you
will need lots of touch sensors to tell you when you have reached certain
positions. Its doable.
have fun,
DLC
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Message has 2 Replies:
 | | Re: pneumatic switch control
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| (...) To connect the motor to the switch, use a piston arrangement (like a car engine). This can be done quite compactly. A single touch/light sensor and medium pulley wheel can be used to count motor revolutions (to determine when you've gone from (...) (25 years ago, 23-Apr-99, to lugnet.robotics)
| | | Re: pneumatic switch control
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| Dennis Clark wrote in message ... (...) dropped (...) See demonstartion of the principle: (URL) pneumatic control from menu Eric Brok Visit LEGO ON MY MIND: (URL) Control section: (URL) section: (URL) (25 years ago, 26-Apr-99, to lugnet.robotics)
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Message is in Reply To:
| | pneumatic switch control
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| (...) I've been thinking about this a lot... What about using a differential to separate motor direction output. Turning one direction could control one switch and turning the other could control the other switch. The switches could be controlled in (...) (25 years ago, 22-Apr-99, to lugnet.robotics)
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