T08A2 / R3000 spider lightweight tank (from GITS)

[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

[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...

[Guest]

One of the most complicated parts: it's time to cover main-body to which all legs are attached:

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The optimistic plan was to print it from a couple of parts:

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Problem #1: printer shifts all layers by ~1cm sometime during printing. It still did in a different place when printing flipped part, although the problem was smaller, so I just fixed it by slicing printed part into two and gluing it together in correct place:.

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I subdivided the remaining parts into smaller parts before printing in order to avoid same problems during print:

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Problem #2: I could not assemble robot using these parts - there was no way to fit sphere in the middle through other parts once everything is assembled. I had to cut it into smaller pieces and attach these parts separately.

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Problem #3: first design mistakes: my virtual project had no screws, so when I tried to fit to and bottom part they didn't fit where they belong (see the photo above), so there was a gap of 1cm between them. The main structure of the robot was done by hand without very precise engineering, so gaps between printed parts and servos were uneven. So even if I fixed design problem with the screws there was no I way to fix all gaps. I had to fallback to plan B: use of polystyrene and macroflex To make matters more fun I had to fit wires for 19 servos and plus a bunch of other wires

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More shaping, macroflex, shaping, making surface stronger using PVA glue, polishing, glue, polishing, putty, polishing, putty, polishing:

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Painting and result:

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[Guest]

Excellent work. Having studied mechtronics at college I can appreciate the time in programming and testing etc... Even with the help of on line code If used. I was never too hot on programming Myself!

The advent of 3d printing is excellent and opens up whole new possibilities. I will be getting 3d modelled parts for my 1:1 falcon as it progreses and you can imagine how easy heli or plane parts, figures etc... Can be made and altered without all the steps currently required.

Keep up the great work

[Guest]

Thanks!


Some photos from older printing:


"Find 10 differences!" or "My printer misunderstood what I actually want to print (correct piece is on the left side)":


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"Tail":


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The part is to big to make it as a single print - the max print dimensions 20x20x20cm. It was chopped into 6 individual pieces. The printer was misbehaving again a bit, so 2 out of 6 parts had to be corrected after printing:


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Assembled:


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I covered the bottom piece with too much acetone, which resulted in bends... I had to cut it, screw to the frame, glue together and use a lot of putty afterwards There is still small gap between the top and bottom, so I added a screw to tighten them together after closing. The top and bottom are not glued together, since main electronics sits there and I need to service it occasionally or attach screen and keyboard when coding for it.


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Result:


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[Guest]

I found out that the old RaspberryPi (model B) is getting in a way of cables after assembling all printed parts, so I replaced it by newer model A+. Everything fits much better now:


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This is how it looked before the painting of details:


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[Guest]

Whoa!


You should call this thread "21st century modelling"


Really amazing mate!

[Guest]

Thanks!!!


I finally found time to fix electronics.


Main change: I switched to power source with higher voltage (from 5V to 7.5V) - this gives more strength to the legs. One of the main problems was that it was having hard time standing on the legs after putting so much plastic on it. The robot weights ~5kg now. New and shiny power source:


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Of course RaspberryPi still needs 5V, so I had to put voltage stabiliser. That leads to some energy loses, but who cares when you're not planning to use batteries and you have 26A )


I also had to switch to shorter and thicker power cables for servos. And better plugs for those cables too. I'm glad I didn't have to pull any new cables through internals of the robot - it would be very hard to do at this point Although I still had to put a relay in the back and some thick cables. It doesn't look nice (when it's open), but it works!


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I found out that servos in arms take 6V max, so I had to put another voltage stabiliser Any change is never as easy as it seems at first sight


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[Guest]

3Dprint.com did a story about my robot, yay!


http://3dprint.com/54671/ghost-in-the-shell-robot-tank/

[Guest]

Happy New Year everyone! I finally found time to get this project going again - there isn't better time than a night of New Year celebration I hope to get a better camera soon and make a final photoshoot....


Here are some older picture about what happens when your 3D printer messes up your print and shifts half of a piece. Anyway, there is no thing that saw, glue and putty can't fix )

[Guest]

Incredibly job, maybe the future of modeling????

[Guest]

This forum went haywire while I wasn't here


Painting the robot was a lot of fun. I've done these layers:

• Prime color
  
  
• Shadows / light surfaces
  
  
• Weathering details
  
  
• Chiping
  
  
• Rust
  
  
• Weathering sufraces
  
  
• Oil/dirt
  

I overdid the chipping, but that's what happens when you're doing it for the first time