Subject:
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Re: first pics of crane
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 28 Jul 2004 23:45:49 GMT
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Viewed:
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3420 times
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In lugnet.technic, Ross Crawford wrote:
>
> Yummy. One thing I'd like to look at one day is the possibility of using a
> leadscrew arrangement and locks inside the boom like most cranes use these days,
> so that each section can be extended individually. But that is probably a
> pipe-dream...
I really like the system you mention, it is a really elegant solution. It also
appears to allow more telescoping sections, presumably to due not having
additional complexity with each added section, unlike a cable driven section,
and perhaps less mass since there are no cables. I would imagine you would
really need an RCX for this though, since the boom sequencing could get pretty
complex to do manually.
Are you sure they use a leadscrew as opposed to hydraulics though? I thought I
saw a leadscrew used on the Demag AC60 city crane at one point, but after
thinking about it I wasn't sure if this was used for boom extension of pinning
each section.
Jennifer
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Message has 1 Reply:
 | | Re: first pics of crane
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| (...) From what I saw on the AC100 (URL) the operator just dialed in the length they wanted, and the pooter chose the position of each section (in that case it was fully extended anyway so not a difficult calculation). Each section had (IIRC) 3 (...) (20 years ago, 29-Jul-04, to lugnet.technic)
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Message is in Reply To:
| | Re: first pics of crane
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| (...) Yummy. One thing I'd like to look at one day is the possibility of using a leadscrew arrangement and locks inside the boom like most cranes use these days, so that each section can be extended individually. But that is probably a pipe-dream... (...) (20 years ago, 28-Jul-04, to lugnet.technic)
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