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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Mon, 5 Feb 2007 19:47:53 GMT
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Viewed:
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2688 times
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In lugnet.org.ca.rtltoronto, Calum Tsang wrote:
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Okay, there’s something off the bat I’m worried about, which is that you’ve
built the track out of unobtanium, aka, monorail track. No one has any of it
and it’s more expensive than goat horns or robot testicles. Can this run on
4.5V track or something?
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Hahaha :)
The advantages of using the monorail track are that it’s very, very rigid
laterally (like, it can really press into it without it deflecting at all) and
simple to construct. It’s a wide, flat surface... the 4.5 V rails I fear will
flex. :/ I hear you on the availability thing though.
I certainly have enough monorail track that I could “loan out” 2 beams to each
person for their cell, or each person could mock up the rail by just making a
wall 2-bricks high of 2x4’s interlocked together or whatever.
I’ll have 2 shuttles and a sensing system mocked up within a couple of days.
The other big advantage of the monorail track is that since I want to switch to
using a light sensor for slow-down and stop (vs. touch - I was having way too
many problems getting the touch sensors to consistently activate), the light
sensor can look down at the top of the beamway (on a bracket cantilevered off of
the “whisker” wheel), it’s looking at a constant grey colour. Using the side
mounting on the monorail beam, it’s easy to mount a black or white tile (I’m
thinking 1x6 flat white for decel, 1x2 flat black for stop target).
This will mean though that each car needs 2 light sensors (one for collision
detection, one for positioning) and they’re kinda sparce (only 1 in each RIS).
I have 3 at home and 3 here at work, so I could make 3 cars, anyway.
I’m imagining that since the shuttles are getting larger and bulkier the overall
scope of this thing is going to rise from many, many little 9V train shuttles
zooming around every 2 seconds to a larger cadence, maybe 10-15 seconds or
something. But even at that, 3 going around will look very exciting, I think!
If people use 48x48 baseplates, that works out well, because the monorail beams
are 32 long, so 2x32=64, so that leaves a 16 dot gap between assembly stations
for wires, overhangs, whatever.
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Is this method more accurate than the train motor for being in the same place
every time for part placement?
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Give me a day or two; once I get this one powered up and have a prototype loop
set up to test stopping, I’ll post a video.
here’s a clip of the 9V ones
running around. It’s in the dark, because... yeah. :) Turning on the light
futzed up the light readings for the proximtiy detection. Gotta work on that.
I’m still thinking that we’ll need some kind of pallet lift/locate to accurately
lock in place at each stop, which would be on-board each shuttle.
-Iain
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Message is in Reply To:
 | | Re: Proposed Assembly Line Project
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| (...) Whoooohooo! That's me! I've been to Morgantown, West Virginia! (...) Okay, there's something off the bat I'm worried about, which is that you've built the track out of unobtanium, aka, monorail track. No one has any of it and it's more (...) (17 years ago, 5-Feb-07, to lugnet.org.ca.rtltoronto, FTX)
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