Project Gargantua (or Gar)

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Project:

By request, my 6 year old son wanted me to design and build him a Hexapod. So I started to whip up some designs in Zbrush and together we decided what he would look like. "Main thing he has to have dad, is an arm cannon!" So we got that. Then I thought it would be cool to have a robot kinda part of or riding the hexapod. So kinda a centaur bug/robot thingy.

First thing I had do was figure out was how big would be too big? There are alot of reasons why not to go too big, which I ignored. So from an engineering stand point, "will it walk?" is the big question. At first I thought it would be about 5 pounds, then it went to10 pounds and now it might be around 12 pounds...so again time will tell. Maybe it walks once or 2 feet then crumbles!

I sourced out the materials and batteries. Knowing this was going to be a 23 servo design, I wanted a good battery and and chose a 7600 mah lipo. Maybe it will run for 15 min underload... again untested, time will tell.

Finally I chose PETG for the print material, due to its strength. Two weeks of printing on 3 printers 24/7. There ended up being 53 individual parts.

The Motions include 18 axis for the legs, waist forward/back tilt, waist rotate, cannon arm up and down, head up and down and rotate. 23 axis in total. The body is comprised of EZ Robots micro servos and the legs and tilt are the HDD servos also from EZ.

There will be an EZB inside and camera in his chest. A Bluetooth amplified speaker system onboard will allow us to play TONS of robot sounds from BlueZone.

I will updated this project as I finish goals, but if he doesn't walk due to weight or burning out servos due to stress, I will most likely abandon this build, as the next logical step would be to move up to dynamixels, but that would require $5000 worth of servos. A bit much for a toy!

So lets get started!

Here is a final design in zbrush and keyshot


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Then came the modeled parts each one 3d Printed.




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Here I've started adding the axis to the body



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Here I continue on with assembling the main chassis



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I could only assemble one side of the legs as I am waiting on some servos and screws to arrive.



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And here is my first sloppy attempt at testing motion with autopoistion:




fxrtst
Commented September 7
Current release schedule for 2019: Capt Marvel Mar 8, Avengers 4, 3rd of May, Spiderman 2 July 5th....and on and on... :)
fxrtst
Commented October 19
Well I'm back from shooting Avengers 4 and will finally finishing this guy up. Stay tuned.
Mickey666Maus
Commented October 20
We will! :D
fxrtst
Commented December 8
I found some 30 kg/cm servos online and I'm going to skip over the 20 kg/cm versions that I bought and try out these new ones for way more power. I will need to source out a 8.4 volt battery to fit in the space I made for the 7.4 v one. After I get CES out of the way I'm hoping to finally finish this up...If i wait too much longer my son will be too old to play with toys!
robo rad
Commented December 13
:)Holy Jebuz! That looks like a monster! I just saw something similar in episode 2 of that new space series Night Fliers it had a killer Laser!
Robot
Avatarfxrtst
Published on Tuesday, May 29, 2018