Subject:
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Re: Proposed Assembly Line Project
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Thu, 18 Jan 2007 03:06:33 GMT
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Viewed:
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1648 times
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[pardon the uninvited Yank, but I love the idea and have been lurking. And I'm
hard to actually shut up, just ask Steve]
In lugnet.org.ca.rtltoronto, Calum Tsang wrote:
> deciding the building sequence...
One thing you guys could consider is having different folks come up with
different building sequences on their own, and then coming together to hammer
out which is "best" or "most fun". Brainstorming independantly might generate a
lot more variations to pick from.
> One item (the minifigure) needs to assembled before
> his legs are folded and he's seated on the car).
On idea to even push this further - sub assemblies could be made by their own
perpendicular assembly lines, so that sub assembly lines could be working in
parallel with the main final assembly line. More action, also less linear (for
better or worse).
> How do you guarantee the pallet and carrier stay
> stationary while a cell's robot is trying to place
> something?
Use arms that fold out from the workstation - when those arms are rotated 90°
out, they only have room for the carrier in one specific place, sort of a
mechanical bear hug. But if all you guys are doing each station independantly,
you might come up with a lot more than one way of doing this. Another possiblity
I was thinking about for final positioning is using train coupler magnets from
the side to lock the carrier into place. For the GBC train we need to position
the cars with a +/- 1 stud position, and usually get to about +/- 0.5 studs .but
it takes some fine tuning. Those train motors are a bit of a pain to control (I
don't know if you are planning on using the NXT in here as well, but this is one
place it might be handy - build a "NXT on a rail" so it can know it's own
position much better).
> Extend a pin to keep it from moving?
An axle maybe. But For that to work, you really need the positioning to be +/-
0.2 studs or better. Fold out or fold down arms with sloped guides would get you
from +/- 2 studs to "right on the money" fairly easily.
--
Brian Davis
(who is also dying to see the "censored" sections of Ian's stuff)
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Message is in Reply To:
 | | Re: Proposed Assembly Line Project
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| (...) There's a lot of prework for organizing: The carrier and the assembly pallet at minimum. Then deciding the building sequence. Thankfully the building sequence is pretty top to bottom. One item (the minifigure) needs to assembled before his (...) (18 years ago, 18-Jan-07, to lugnet.org.ca.rtltoronto, FTX)
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