discussion T08A2 / R3000 spider lightweight tank (from GITS)

[Guest]

I started working on T08A2 / R3000 spider tank from Ghost In The Shell movie a year ago. For those who haven't seen the movie - I would highly recommend, it's one of the best sci-fi anime movies.



Scale 1:20 (roughly )

One of the biggest problems that I had from the start was non existence of blue prints, or actually anything that would be close to that. That's why scale is approximate So for "blueprints" I ended up with a few things:

• Screenshots from the movie
  
• Smaller resin model from ebay, which isn't proper quality
  
• Someone made a 3D model, which I managed to aquire. It isn't very accurate, I would say it follows movie almost...
  

So yeah, none of these were precise. Actually, even frames from the movie sometimes contradict itself. To make matters worse I wanted to make a model which could move, so following sizes and strength of mechanical components had to be taken into consideration as well...

Initial idea was to make the shell from a styrofoam, but during last year I bought a 3D printer, which came very handy when making these complex shapes.

 

[Guest]

This is almost complete frame (except "arms"/weapons) and close to complete electronics:

Motion is controlled by RaspberryPi. Programming in C++, from scratch. It is controlled with PS3 joystick, but there are plan to have some autonomous functionality.

 

[Guest]

Interesting project Paulius.

I have all the Masamune Shirow comics!

PS: Welcome to the forum.

 

[Guest]

Wow...that's impressive I can only claim that I watched all GITS movies/series and I'm a huge fan

 

[Guest]

Yes!! But I prefer the book/comic one

 

[Guest]

A little bit from inside the "brain" of the robot:



The robot has full model of itself (in order to do correct simulation) and it's calculating where to make steps in such way that legs do not collide.

 

[Guest]

A little bit from work progress:

Model in 3dsMax:



Model in 3D printing program:



Model in 3D printing program (after slicing):



Printed parts:



Here should be some screenshots of work with sanding paper and acetone, because that's a big part of 3D printing, but about that some other time

Assembly of electronics (2x servos, 1x laser):



Hiding of cables inside the ammunition belt:







Painting of base color and assembly:

 

[The Migrant]

That is some very impressive 3D modelling

 

[Guest]

Yep! Certainly this a new and different kind of modeling

 

[Guest]

While other bake cookies for Xmas, I bake robot parts

 

[Guest]

A short video from testing of arms:

 

[takeslousyphotos]

Amazing ....... The progress on this is gonna be worth watching.........

Peter

 

[Guest]

I guess we are watching the future for scratch builders, there's gonna be a real surge in cottage-industry after-parts, if I'm not mistaken!

 

[Guest]

Wiring complete!

• 2x Raspberry Pi mirco computers (1st for motion control, 2nd for face tracking)
  
• 28x Servos (18 for legs, 4 for body, 6 for weapons)
  
• 1x Camera (for face tracking)
  
• 3x Servo drivers
  
• 2x Lasers (how can you have a robot wittout lazors??!!! )
  
• 1x Distance sensor
  
• 1x PS3 controller
  

...and some armor:

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[Guest]

wow. VERY impressive

 

[Guest]

A little bit more of progress on the legs:

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3D printing:

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Polishing (i.e. reducing visibility of 3D printing slices by sand paper and acetone; acetone also gives strength):

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Assembling:

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Puttying (is that a word? ) (hiding marks of 3D printing even further):

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[Guest]

Painting:

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Result:

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"Suspension" of toes:

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I hope to finish main body and the I'll be able to attach the legs. I hope that everything will work once cables are connected (fingers crossed ) Otherwise I'll have to disassemble (read: break) and redo some parts ) The original plan was to have ability to disassemble, but that was too complicated, so I skipped that part

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[Guest]

I suspect we are witnessing the future! what's so exciting about this is that there will be the possibility of making kits of really obscure subjects - 1/48 Avro Anson, anybody? Or a really well detailed Dalek? I'll get me coat...

 

[Guest]

Awesome work, by the way!

 

[Guest]

Thanks!

Yeah, as long as you can find a 3D model online (or make one yourself) - you can 3D print it. What I like about digital models is that once someone makes free model available online it kinda stays that way forever, so you have more and more models available for free 3D printing is becoming more affordable too.

Although I hope to see more availability of other production methods: I would choose to CNC from polystyrene next time for a moving model, because 3D printed model is way to heavy. Unless technology of magnets, motors or hydraulics makes a big leap...