Subject:
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Re: CD auto feeder project
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 4 May 2004 23:55:00 GMT
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Original-From:
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Steve Baker <sjbaker1@^spamless^airmail.net>
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Viewed:
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876 times
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David Glynn wrote:
> Steve, I took a ride in the "internet way back machine" (google it) and found
> this:
> http://web.archive.org/web/20030605111923/http://www.ecf.utoronto.ca/~stehlik/wwpics.html
Aha! Yes - that's the beastie I was thinking of.
I always forget about the way-back machine.
> I didn't know it was possible to create a vacume with the Lego pneumatic parts.
Well, re-reading it, it's evident that he's using old pneumatic parts that you can't
get anymore.
However, his problem was to produce a really strong vacuum - enough to hold the whole
weight of an RCX and all those motors to a vertical glass window. To lift something
as light as a CD, something much less powerful might work.
If you take a large pneumatic cylinder and connect a hose to the bottom fitting (say)
then pulling the actuator arm upwards creates a pretty strong suction and pushing the
cylinder down again releases it.
If you keep the hoses short, that might be enough to lift a CD and hold onto it for
a few seconds (that's all you're gonna need to swing it over the drive tray).
It looks like the suction cups are not Lego parts though.
---------------------------- Steve Baker -------------------------
HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net http://tuxaqfh.sf.net
http://tuxkart.sf.net http://prettypoly.sf.net
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Message has 2 Replies:
 | | Re: CD auto feeder project
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| (...) Fortunately, the situation isn't quite so dire: (URL) actually quite a bit more available now than when I picked up much of my old pneumatic stuff a year or so ago. Mark (20 years ago, 5-May-04, to lugnet.robotics)
| | | Re: CD auto feeder project
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| Steve, thanks for the pointer, I'll be spending some time going over Rob's window walker figuring out how he did things. (...) I'd be suprised if they were! Though I did find the perfect suction cup on-line: (URL) get more perfect then that. (...) (...) (20 years ago, 5-May-04, to lugnet.robotics)
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Message is in Reply To:
| | Re: CD auto feeder project
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| (...) Steve, I took a ride in the "internet way back machine" (google it) and found this: (URL) didn't know it was possible to create a vacume with the Lego pneumatic parts. Thanks I'll deleve a bit more down this path. (20 years ago, 4-May-04, to lugnet.robotics)
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