Subject:
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Re: The Great Ball Contraption
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 21 Jan 2005 21:30:04 GMT
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Viewed:
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5903 times
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In lugnet.robotics, Jordan Bradford wrote:
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In lugnet.robotics, Steve Lane wrote:
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In lugnet.robotics, Steve Hassenplug wrote:
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I’m not exactly sure how many “teeth” = 1 stud, but I know it’s not a whole
number.
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It’s exactly 2.5. 10 teeth on a gear rack, divided by 4.
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I’m using two upside-down 1x16 TECHNIC beams to straddle 24-tooth gears on
each end (see my great ASCII art below, top-down view, not to scale). I might
not even need tension in the chain at all; the tread links slide on the flat
bottom part of the beams, and that seems to work fine. I haven’t yet built a
support structure to test the chain for real.
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I have just placed wheels regularly spaced along my chain to support it.
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My “buckets” are simple and work pretty well, even at steep angles. Every
fourth tread link has a 1x4 plate on it, and on each plate are two of those
2x2 right-angle plates making a squarish area for the ball to rest in. Again,
some beautiful ASCII art:
Step 1:
_______
|_______| <- that's a 1x4 plate
Step 2:
_ _
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|___|___| <- those are right-angle plates
What other bucket designs do people have?
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Mine are similar, but use a 1x3 plate with a 1x1 plate with tooth on each end,
at a slight angle, and another 1x3 plate on top. I was finding that even with an
accurate feeder, they were occasionally bouncing over the side when I used 1x2
plates on each end.
ROSCO
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Message is in Reply To:
 | | Re: The Great Ball Contraption
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| (...) I'm using two upside-down 1x16 TECHNIC beams to straddle 24-tooth gears on each end (see my great ASCII art below, top-down view, not to scale). I might not even need tension in the chain at all; the tread links slide on the flat bottom part (...) (20 years ago, 21-Jan-05, to lugnet.robotics, FTX)
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