Subject:
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Re: Help with redesigning a Boat Lock
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 5 May 2005 13:22:29 GMT
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Viewed:
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3297 times
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In lugnet.technic, Brian Davis wrote:
> In lugnet.technic, Steve Hassenplug wrote:
>
> > Actually, you don't really need sensors at the
> > bottom, assuming the lock doesn't actually open
> > at the bottom. Just run it down for a length
> > of time, then run it up until the sensors are
> > pressed...
>
> Another possibility is to not make the connection between the lift lines
> and the lifted frame rigid, but "slippable" (for instance, instead of using
> a single line, use a loop that attaches to the frame by wrapping around
> several fixed pulleys or something. When the frame is lowered, overlowering
> it will cause the connections to slip and align the frame once per cycle.
> Getting the friction to stay correct throughout the show may be an issue,
> but this way the system would handle slight misalignments and correct them
> automaticly.
The 'water' and especially the boat are quite heavy, so any slippable
connections would not work. The weight would also cause problems with driving
the string reliably.
john
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Help with redesigning a Boat Lock
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| (...) Another possibility is to not make the connection between the lift lines and the lifted frame rigid, but "slippable" (for instance, instead of using a single line, use a loop that attaches to the frame by wrapping around several fixed pulleys (...) (20 years ago, 4-May-05, to lugnet.technic)
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