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Robot Prototype WIP 2 by WurdBendur Robot Prototype WIP 2 by WurdBendur
The first photo of this has been moved to scraps if you're interest, as will this one when some progress is made.
I still haven't got much done on my robot, but hopefully that will change since I'm finally finished with the semester. I've refined the form a little, though it still needs lots of sanding. And whenever I sand, it turns yellow. I'm not sure what's going on with that. I've just learned that bleach is safe to use with PVC (had to be sure before mixing things!), so I'm going to try that if it persists through further sanding.

At this point, I've stuck the parts together with a kneaded eraser just to hold them, and I used bits of it to size up the balls I will need for the joints. The three shown are 18mm, 12mm, and 9mm (hip, shoulder, and smaller shoulder ball). I've been looking for beads in those sizes, but I haven't found them in any store around here, and buying online means getting hundreds, which I really don't need. Moving on from this point depends mostly on finding these, but I'll see if I can throw some more parts together while I'm looking.

Anyway, this pretty clearly displays the mechanism I've referred to with one ball set inside another. This should allow the robot to move its shoulders in a more realistic manner, including reaching up without awkward angles, and even shrugging.

Also, the color scheme here is about what I'm looking for. I'm not sure why I like the plain white with dark joints, but I decided that very early on, something more than two years ago when I was drawing the original design (which is totally different than this in almost every way). It's hard to believe I've sat on the idea that long before actually bothering to do anything. Though I recall having a preference for the combination long before, as I used it in a lot of my other drawings. I need to find those.
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Tulsatrash Featured By Owner Mar 26, 2012
got any advice on how to design good shoulder and hip joints for model giant robots?
WurdBendur Featured By Owner Apr 3, 2012
For giant robots, I guess you're probably looking for something armored and suitable for combat. The natural movement I'm aiming to create with this design is probably not as important in that case, so something simple (easier to build/repair, and less vulnerable to damage) is more ideal. The typical Gundam-style joints pretty much hit the nail on the head, with a sort of peg extending out from the shoulder and a single ball joint on the end, all covered up with a slightly awkward piece of armor.
If you want to keep it even simpler, a couple hinged joints placed close together will give you a similar range of motion to a ball joint, but a single ball joint will probably work best for a model.
unclefungus5 Featured By Owner Apr 3, 2009
i like the idea of a smaller ball within a larger ball for a shoulder joint. is this a doll build? or work for an actual animatronic?e-mail me if yes. i got some ideas.
WurdBendur Featured By Owner Apr 5, 2009
Thanks, I'm glad you like it. It's really just a doll, but I like to entertain the idea that I might someday do more with it. Unfortunately I'm useless for robotics.
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Submitted on
December 18, 2008
Image Size
1.7 MB



Camera Data

SANYO Electric Co.Ltd.
Shutter Speed
16500/1000000 second
Focal Length
17 mm
ISO Speed
Date Taken
Dec 18, 2008, 12:30:23 AM