WEBVTT
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Welcome to another episode of Wintergatan Wednesdays.
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Eh, and here it is business as usual, as you can see,
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I am trying out yet another lifting mechanism.
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It's a conveyor belt ratchet system combined.
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[drill whirring]
[ratchet clacking]
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That's basically the mechanism.
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Slow-mo rolling.
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[accelerating ratchet sounds]
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[ratchet sounds slowed down]
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In the last week's video I built a
ratchet marble lifting system,
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and in that video I said this:
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'Instead I came up with this a ratchet lifting system.'
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'This system really have the ability to lift
eight marbles per crank turn.'
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[poing]
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That was all wrong.
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That ratchet system and the way it's
driven only lifts four marbles per crank turn.
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And in this episode, I'm going to
replace it with something better.
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And I am also going to explain why we
need eight marbles per crank turn.
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[♪ unreleased/Wintergatan Wednesdays Music Box ♪]
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I thought I'd start with explaining why we
need to lift eight marbles per crank turn.
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Do you remember this test music I made
to explain the magnet MIDI music system?
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[♫]
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Just to repeat, every click here,
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[tap][tap][tap][tap]
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is one crank turn.
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turn, turn, turn, turn, right?
[tap][tap][tap][tap] .
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So if we have a busy pattern on the
vibraphone like this:
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[♫]
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You can already see that we have:
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one two three four notes.
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That means that we need four marbles...
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...per crank turn, to only to play this.
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[♫]
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But the Marble Machine X has more instruments
than the vibraphone. So if we add...
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a simple snare.
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[♫]
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off-beat like that, we're up to...o...
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nine marbles per two crank turns.
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If so, and if we then continue
add a simple kick drum
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and then we add a hi-hat on top of that.
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[♫]
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You start to see here now.
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Seven marbles for that.
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[♫]
Seven.
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[♫]
Six.
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[♫]
Seven.
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Umm, but this pattern is really simple.
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If you make more complicated
kick drum pattern,
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[♫]
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You see we're already up to
eight marbles per crank turn.
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[♫]
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So this is drums and vibraphone, but we
also have the bass on the Marble Machine X.
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[♫]
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So with a very busy vibraphone pattern,
we exceed eight marbles per crank turn.
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Here we have four, seven and
eleven marbles per crank turn.
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So... the marble machine would,
will be able to play this for some time,
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because it has a lot of marbles
stored upstairs.
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But it won't be able to sustain it for five minutes.
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when I make a really...
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busy vibraphone pattern I need to keep
the drum pattern a little bit less busy.
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[♪ unreleased/Plot Twist ♪]
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Cheers!
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Coffee. What would we do without coffee?
[chuckles]
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[♫]
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[♫]
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Butterfly luck.
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[bang]
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[crash]
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So... as you can see,
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if we only had four marbles per crank turn,
we would only be able to play,
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[♫]
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...either only this, or like...
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[♫]
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...only this...
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[♫]
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...or only this.
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But if we can get eight marbles per crank turn,
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we will be able to play, almost something
like this
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[♫]
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So, that's why it's so important.
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Okay let's do some prototyping to solve this problem.
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I started with some spring
cleaning on my workshop,
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And I built a weld cart slash Robot wars contestant.
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The draw for a Sir Darthalot was a little bit tough.
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He's meeting This Old Tony's
welding cart in round one.
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So we'll see.
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What I have to measure with
this prototype is the ti...me,
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for the marbles needed going there,
because this will move extremely fast.
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It will move, boom, boom, boom, boom...
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[♪ unreleased/Plot Twist ♪]
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This profile's nice! Cut.
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Nice to see.
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So this is the improved prototype with
some changes.
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And, see if we can get up
to marble speed with that.
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I have a slow-mo camera set up.
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The only thing I need now is the marbles.
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So... Let's go over here... and look.
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and, of course, the one box I need,
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is guarded by a demon.
[laughs]
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I, I love animal but these long leg things,
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I, have to, convince it,
that this is the wrong box to sit on.
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Hello, my friend! [tap][tap][tap]
Can I please take my marble.
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Whoa!
[scream]
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Okay. He went there.
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Good choice. My friend.
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So, I'm gonna take the marbles,
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and we can start the test.
[♪ unreleased/Plot Twist ♪]
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We have bigger openings,
more like the CAD model.
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We have shimmed the opening so the marble
queue won't rock back and forth as much.
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being pushed back and forth,
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I have a new ratchet that's better placed.
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[♪ unreleased/Plot Twist ♪]
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I'm gonna try to max this one out.
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Just beautiful.
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[laughs]
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Let's analyse this slow-mo.
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Um...
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Wow!
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[accelerated speech:] 17 divided on 25
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0.68
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four strokes
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divided on 0.68 seconds, equals...
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...5.8 marbles per second times 60...
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This was 352 BPM.
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Actually, that's some nice headroom.
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Yay!
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This proves that the marbles
loads fast enough in this method,
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for playing music up to 200 bpm.
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And, in the prototype I'm using
one row of marbles,
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but in the real version, we have eight marbles.
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So, now I need a way to divide...
all the marbles onto eight.
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So if you remember we CADed a divide by eight swing.
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Tobias Smidebrant from Götenborg has
sent me the first 3D print of that one.
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And, here I am adjusting the weight
[bg:] Alright, pull back a little bit
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nut on the backside to
[bg:] Nearly there.
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really make the swing...
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tip exactly when it has eight marbles on it.
[bg:] five...six...seven.
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I tapped an M8 hole in the plastic,
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and I used this lock nut
to lock the bolt into place.
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and this really worked well.
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You can adjust this with very high precision
to fall exactly when, when I want it to fall.
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But, I realized that this swing is too slow.
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because the conveyor belt can lift,
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eight, eight, eight, eight, eight,
eight, eight marbles, fast like that.
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and the swing, can't handle,
that high marble pressure.
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So I needed another way to divide by eight.
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So I've been prototyping another system.
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I've been trying this, I've been trying that.
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What I come up with is this.
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To divide one single row onto eight
just before the conveyor belt.
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This seems to be very reliable.
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So if I now...
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If these marbles...
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The marbles, come into the ring
gear from the planetary gear-set,
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the blue line there,
and they come in this new exit...
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...thing here,
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that has quite complicated geometry.
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But I think this will work great.
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It attaches to the main frame here,
as you can see.
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I added some texts (to)
this 3D printed part here.
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Ehh... just for fun.
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The marbles come in this thing.
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Uh...
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They get split up onto the four channels,
like I talked about last week,
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over the big demagnetizing wheel.
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The magnets are not gonna be colored.
It's just for symbolism.
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Uh, the marbles done.
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I'm not really done with this,
it's, it's sketches.
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The marbles then get collected into one row,
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by this loft command I used to create this shape here
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And then they go into this.
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And this is one of the most complicated things
that I've ever CADed.
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Because the geometries...
on these eight slopes are all individual.
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Uh, so, they have a 5 degree slope,
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seen from this direction,
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but they also have a 5 degree slope
seen from this direction.
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they're all individual from the start and
need to end up at the same spot in the end.
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So that was a little bit... [breathes heavily]
eh... complicated
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This works exactly like the marble divider.
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The channels that are full,
will skip the marbles and the marbles will,
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roll into the empty channels
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And then they will be lifted up by
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this, the conveyor belt system.
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And the cool thing is, um...
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So I found this inspiration from a youtube video
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for, like, some kind of industrial solutions
for nuclear plants and recycling stations,
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where they use this chain links.
00:12:49.052 --> 00:12:53.258
And it was actually, seeing
that video, that got me into...
00:12:53.259 --> 00:12:56.375
...understanding how I can
build a marble conveyor belt
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that is efficient and looks good.
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So each... chute...
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that holds the marbles,
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has a gear tooth shape.
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So up here, they turn into a gear drive,
and the chain links is also fitting in here,
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between, uh, the gear as you can see here,
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And the cool thing is that, this conveyor
belt is not driven by these gears.
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It's not driven by a rotating mechanism.
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This conveyor belt is driven,
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by the two pistons.
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These two pistons
will move up and down,
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with 40 millimeters... travel.
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So, just, as you can see here, the right piston
here, is connected to half of the fish stair steps,
00:13:43.089 --> 00:13:46.711
and the left piston is connected to the other half.
00:13:47.219 --> 00:13:52.209
And I also implemented a spring tension mechanism here,
00:13:52.210 --> 00:13:56.165
to help the pistons fight gravity a little bit.
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And, on this side we're going to have ratchets.
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they are not sketched in this design yet,
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but they are coming out to the left side here,
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and they will go inside this conveyor belt here.
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And the ratchet will lift...
the chutes themselves.
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Every chute will...
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whoop-whoop-whoop-whoop, so there's,
00:14:16.459 --> 00:14:19.658
There is several things that is
very, very good with this design.
00:14:20.159 --> 00:14:24.498
We're losing very little height.
If we look at it straight from the side, like this...
00:14:24.499 --> 00:14:27.799
let me put on... orthographic and not perspective,
00:14:27.800 --> 00:14:30.493
and then we have a really flat view like this.
00:14:32.353 --> 00:14:35.417
So, you can see that this is the top of the marbles,
00:14:35.418 --> 00:14:39.462
and down here where they're picked up is
just five centimeters or something, and then
00:14:39.463 --> 00:14:42.135
We've done a lot with five centimeter fall height.
00:14:42.136 --> 00:14:44.449
We've demagnetized the marbles.
00:14:44.450 --> 00:14:46.576
And we've routed them around and back.
00:14:46.577 --> 00:14:49.288
And if we look from the front of the machine
00:14:49.290 --> 00:14:51.290
Umm..
00:14:51.291 --> 00:14:54.676
We are actually not going out,
[♪ unreleased/Plot Twist ♪]
00:14:54.677 --> 00:14:57.482
that far, to the left with this design.
00:14:57.483 --> 00:15:02.690
This, conveyor belt, reminds me of this
snake rattle and roll game, which I loved.
00:15:02.691 --> 00:15:04.880
When you climb the waterfall you know?
00:15:04.881 --> 00:15:08.002
In the, like world seven, super-difficult.
00:15:08.003 --> 00:15:12.518
The marbles are like, climbing the snake
rattle and roll... system.
00:15:13.193 --> 00:15:17.391
So when these marble shuttles
reaches the top, it will tip over.
00:15:17.392 --> 00:15:22.754
And the marbles will then roll on the backside,
on the chute that was before them.
00:15:22.755 --> 00:15:26.229
So if you see, the structure here is that the
00:15:26.230 --> 00:15:30.599
marbles will start to roll on this surface, so to speak.
00:15:30.631 --> 00:15:32.972
It's right under the marbles on this one.
00:15:33.408 --> 00:15:38.544
So they will roll on the swing that was
before them, and roll off into...
00:15:38.545 --> 00:15:40.910
...some tracks that I did not design yet.
00:15:40.949 --> 00:15:42.861
So...
00:15:42.862 --> 00:15:45.305
So, that's the idea right now.
00:15:45.784 --> 00:15:51.893
I... think this is very viable because I've
done a lot of prototyping to get to this point.
00:15:52.560 --> 00:15:54.560
So when I built the first machine I only
00:15:54.999 --> 00:15:56.999
made videos when I was done with parts.
00:15:57.040 --> 00:15:59.040
And I was regretting off towards that I
00:15:59.070 --> 00:16:01.070
didn't show all mistakes and all the
00:16:01.070 --> 00:16:03.297
changed designs and stuff and
00:16:03.298 --> 00:16:06.506
the way I'm making the videos now, update every week
00:16:06.507 --> 00:16:11.264
You really get to follow how I go into
the dead ends and how I try to
00:16:11.265 --> 00:16:13.554
[chuckles]
dig myself out of them.
00:16:13.555 --> 00:16:15.211
Thanks so much for watching.
00:16:15.212 --> 00:16:19.529
I'm editing these videos nowadays, a little
bit with shoot-from-the-hip attitude.
00:16:19.530 --> 00:16:21.628
[laughs]
I hope you like it.
00:16:21.629 --> 00:16:23.922
I hope they're some kind of cohesion.
00:16:23.923 --> 00:16:25.174
Have a great day everyone!
00:16:25.174 --> 00:16:27.389
And see you on the next Wintergatan Wednesday.
00:16:27.389 --> 00:16:29.825
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