Yeti build thread. Not in the wrong section.

[Spankyfart]

I came for the chain,
I heard there was a chain, where is the chain?
I'm so confussled.

 

[LumPi Panda]

I think you said the chain had to move, so I'm assuming 1 million laser cut buts of .8mm styrene and a whole lot of 1mm plastic rod. if this is the case, yer, you don't need a chain.

Not far off...

About 450 laser cut bits of 0.3 card, 225 laser cut 0.5mm thick acrylic rollers and a whole lot of 1mm plastic rod.

One pair of headphones, a really good playlist, some really good tweezers, superglue.

The correct mindset.

Still need to do the chain...

Here we go....

 

[LumPi Panda]

Outer plates on the left, rollers in the middle, inner plates on the right.
This photo is just the spares left over after completing it. There were loads of these to start with. Every so often one goes pinging out of your tweezers into oblivion. When this happens, it is not worth looking for it, so you simply make loads more than are needed.


The rods are superglued into the outer plates, the other plates and rollers are threaded on. Cutting the end of the rod into a point makes this considerably easier.


Snug them all together and then cut the rod flush with the outer plate. A tiny drop of superglue on the end of the rod holds everything together. The glue MUST NOT get through the gap and onto the inner plate or the whole link is ruined.

Repeat.

One hundred and sixteen times.

 

[LumPi Panda]

The end of each pin is given a drop of silver paint. This is just past the halfway stage.

I still get the occasional flashback.



A sense of scale.

 

[Spankyfart]

The insanity of this.

 

[LumPi Panda]

Dry fit of chain and mechs to check length and line. Two or three more links to go and we're done.
The front mech is held on with a toothpick and the rear hanger is just slid over the rear axle. It is much easier to thread the chain thrugh the mechs when they are not attached to the frame.

All that's left now is a new box to put it in once it's all stuck together.

And sticking it all together.

 

[pete_mcc]

My eyes are hurting just thinking about that chain

 

[27motorhead]

In your tradition of never finishing a personal project, leave it just like that!

 

[stevet1]

I did wonder about the chain, thought you might have a fiendish solution like using a chain off a rear internal gear hub etc. but I guess that would definitely be cheating

 

[LumPi Panda]

In your tradition of never finishing a personal project, leave it just like that!

Great idea, I'm done.

Panda, out.