Subject:
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Re: Crawler Crane MOC
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Newsgroups:
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lugnet.modelteam
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Date:
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Wed, 21 Nov 2001 10:10:35 GMT
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Viewed:
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2348 times
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In lugnet.modelteam, Dennis Bosman writes:
> Are the 9V motors strong enough? I red you use two 9V motors for the
> revolution of the superstructure. Does is shock? Former I had some problems
> with that and actually still have with my CX700 Hitachi. But that's due to
> the top heavy leader of this machine. My LG1550 did very well, but the drums
> weren't fine to me.
The 9V motors are strong enough. Sometimes it shocks a bit, when the weight
is not well distributed (means that I either have too much or too less
counterweight). The crane is able to do 0 to 1.2 revolutions per minute.
When studying the spec sheet from Liebherr, I realized that I have to cut
back on that point and reduce it to 0 to 0.6 rpm. Then the problem of the
shocking will be solved (I hope).
> I saw on Brickshelf you use those 40z gears for the drums. If you hold the
> ropes tight, don't you have problems yours large gears are moving to the
> side? Esspecially when you put a heavy lift in the hook. But it looks very
> good, five drums, that's a lot!
That's absolutely no problem. You have to know that the hook is parted
between 6 and 20 times. Means that When I have 6 kg on the hook, which is
already very much for my model (will realize this with the second version, I
hope) then there's just 1 kg at the winch. And the winch is designed to
withstand about 1.5 to 2 kg.
> You boom seams to be very light. How much time do you need to build the
> crane up? Esspecially the ropes needs much attention I guess ... (I speak
> from experience) I think Thomas has this problem as well ...
It needs a lot of time. About an hour to lift the main boom in its final
position and minutes to hours to adjust the ropes. That depends.
> I hope to see this masterpiece once in real life.
Well, I hope to see you and your models once in real life too.
There's just the problem with Ochten. It will cost me very much to travel to
the Netherlands just for the one day of the show. I think I will not
participate with my crane - sorry :-( Currently I am a student and therefore
earn not that much.
Greetings
Beat
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Message has 1 Reply:
 | | Re: Crawler Crane MOC
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| Hi Beat, About the lifting capacity. Seen this crane? (URL) guy claims it can lift more than 10 kg. I've seen this crane several times, but he huses to many non-LEGO components. The crane is also much to heavy, it almost collapst for several times (...) (23 years ago, 21-Nov-01, to lugnet.modelteam)
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Message is in Reply To:
| | Re: Crawler Crane MOC
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| Hi Beat, As I've already said to you in my e-mail your crane is fantastic. Well detailed, my compliments! You did a good job by making such a huge crane! Are the 9V motors strong enough? I red you use two 9V motors for the revolution of the (...) (23 years ago, 20-Nov-01, to lugnet.modelteam)
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