Subject:
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Re: Some help or advice requested
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Newsgroups:
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lugnet.technic
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Date:
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Fri, 22 Jan 2010 07:55:26 GMT
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Viewed:
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21271 times
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In lugnet.technic, Owen Dive wrote:
> Hi all.
SNIP
> Thanks in advance for any suggestions.
>
> Owen.
I have been asked for some pictures of what I am working on (very much
prototypes at the present - don't expect anything elegant).
http://www.brickshelf.com/gallery/captainowie/Decimator/picture_001.jpg
This is the track for the tray, and the drive mechanism. As the axle at the
front (bottom) of the device turns, the black liftarms pick up the tray and
carry it forward a distance of exactly two studs. They then leave the tray alone
for half their rotation, which is critical for the other part of the machine
(not relevant here). You can see the tray in the top corner.
http://www.brickshelf.com/gallery/captainowie/Decimator/picture_002.jpg
This is the track from a different angle, and the tray. The pins in the tray are
there to ensure that the liftarms have something to push against.
http://www.brickshelf.com/gallery/captainowie/Decimator/picture_003.jpg
Here you can see the tray in the track, at one limit of its travel.
Hope that helps to clear things up - keep the ideas flowing!
Owen.
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Message has 2 Replies:
 | | Re: Some help or advice requested
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| (...) Ok, so I have something that appears to do what I need it to do, however, it is a bit of a monstrosity, and I think that it shows either that I am a genius, or a madman - I'm not sure which! Bear in mind that this still includes several quick (...) (15 years ago, 25-Jan-10, to lugnet.technic)
| | | Re: Some help or advice requested
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| (...) ... (...) Well, seeing your pictures, I can't help wondering: do you actually need the tray to change direction as soon as it hits the end? If not, you can use a much easier solution: just power its motor for a given amount of time in one (...) (15 years ago, 25-Jan-10, to lugnet.technic)
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Message is in Reply To:
| | Some help or advice requested
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| Hi all. I am currently working on a project (to be revealed in due course!) and I've come across something of a stumbling block. I have a tray that is constrained to move in one dimension, and a series of short liftarms under the tray, all rotating (...) (15 years ago, 19-Jan-10, to lugnet.technic)
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