T08A2 / R3000 spider lightweight tank (from GITS)

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PauliusLiekis

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 :smiling3: To make matters more fun I had to fit wires for 19 servos and plus a bunch of other wires :smiling3:

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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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GITS00-Body-Target01.jpg

GITS00-Body-Target02.jpg

GITS00-Body-Target03.jpg

GITS01-Body-3DPrintingProblems01.jpg

GITS01-Body-3DPrintingProblems02.jpg

GITS01-Body-3DPrintingProblems03.jpg

GITS02-Body-3DPrinting.jpg

GITS03-Body-AssemblyProblems.jpg

GITS04-Body-Assembly01.jpg

GITS04-Body-Assembly02.jpg

GITS04-Body-Assembly04.jpg

GITS06-Body-Shaping01.jpg

GITS06-Body-Shaping02.jpg

GITS06-Body-Shaping03.jpg

GITS06-Body-Shaping04.jpg

GITS06-Body-Shaping05.jpg

GITS06-Body-Shaping06.jpg

GITS06-Body-Shaping07.jpg

GITS08-Body-Result01.jpg

GITS08-Body-Result02.jpg
 
D

dougie

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
 
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PauliusLiekis

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... :smiling3: I had to cut it, screw to the frame, glue together and use a lot of putty afterwards :smiling3: 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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GITS00-Tail-PrintingIssues.jpg

GITS01-Tail-3dsMax.jpg

GITS01-Tail-Printing1.jpg

GITS01-Tail-Printing2.jpg

GITS01-Tail-Printing3.jpg

GITS02-Tail-Assembly1.jpg

GITS02-Tail-Assembly2.jpg

GITS03-Tail-Putty1.jpg

GITS03-Tail-Putty2.jpg

GITS04-Tail-Result1.jpg

GITS04-Tail-Result2.jpg
 
J

Judas.1044

Guest
Whoa!


You should call this thread "21st century modelling"


Really amazing mate!
 
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PauliusLiekis

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 :smiling3: )


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 :smiling3: 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! :smiling3:


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I found out that servos in arms take 6V max, so I had to put another voltage stabiliser :smiling3: Any change is never as easy as it seems at first sight:smiling3:


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GITS-PowerUpgrade1.jpg

GITS-PowerUpgrade2.jpg

GITS-PowerUpgrade3.jpg
 
P

PauliusLiekis

Guest
3Dprint.com did a story about my robot, yay! :smiling3:


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

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 :smiling3: 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 :smiling3: )


GITS01-CenterSphere-Printing.jpg

GITS02-CenterSphere-Printed.jpg

GITS03-CenterSphere-Putty.jpg

GITS04-CenterSphere-Result.jpg
 
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PauliusLiekis

Guest
This forum went haywire while I wasn't here :smiling3:


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 :smiling3:


GITS01-Highlights.jpg
GITS02-Chiping.jpg
GITS03-Rust.jpg
GITS04-Rust.jpg
GITS05-Final.jpg
GITS06-Final.jpg
 
Last edited:

monica

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monica
stunning work, :D


some think i would never be able to do as ,just have no understanding of programs to run the printer, :$ O.o
 
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PauliusLiekis

Guest
stunning work, :D


some think i would never be able to do as ,just have no understanding of programs to run the printer, :$ O.o

Thank! Programming is hard, but 3D printing and modelling is relatively easy :smiling3:  So never say never ;)
 
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PauliusLiekis

Guest
One of the goals of the project was to make the robot move in the nice, fluid way. A lot of work went into things that can not be shown by photos - coding and preparing the moves. To make it even more fun I had to redo some electronics - the robot stopped working after just sitting idle for half a year :smiling3: Anyway during the preparations I prepared a storyboards - my final animation was supposed to resemble the original movie:


GITS00-StoryBoards.jpg
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I turned my flat into mini photo studio for a couple days :smiling3:


GITS02-Studio.jpg



I'm not a photographer or filmaker - using a tripod is as far as that goes :smiling3: but I decided to try using a couple of spotlights and a smokemachine :smiling3: The smokemachine turned out to be harder than I thought. You basically have to know how to use it. Having a good camera dosn't gurantee making good photos - the same for a smoke machine. Anyway, I needed it for making photos of the lasers, so it wasn't completelly waster :smiling3: Oh, and I haven't reallized that smoke from smokemachine raises straight up. You need cold smoke in order for it to sit on the ground, so I had to improvise that. 5 liter bottle filled with ice cubes served as cooler for smoke:


GITS03-SmokeMachine.jpg
GITS04-SmokeMachine.jpg

 
 
G

gdollow

Guest
Very impressive.  When I started working with robots in the early 1980's, we had just one arm with a PDP11 to control it.  How things have moved one in 35 years
 
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PauliusLiekis

Guest
To celebrate the new Ghost In The Shell movie, I made a video about how awesome the tank in the old one was! :smiling3: I loved how it looks so much that I built a robot from scratch and I tried to match the motions as close as I could.


BTW, the robot in the new movie is not as cool, calm and menacing. Although the rest of the movie visually is amazing.
 
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