Little WALL-E

 
#1

This here currently-headless wonder is Little WALL-E...

Little WALL-E was once of the Interaction variety and, although clean, he came to me sans head. I didn't ask and he hasn't said. Either way we're in the market for a replacement if anyone has a spare.

And a few pics of his progress...

Tops | Updated 7/3/2011 (ORIGINAL)
User-inserted image

Under Tops | Updated 7/3/2011 (ORIGINAL)
User-inserted image

Tails | Updated 7/3/2011 (ORIGINAL)
User-inserted image

Under Tails | Updated 7/3/2011 (ORIGINAL)
User-inserted image

Ta-da! | Updated 7/3/2011 (ORIGINAL)
User-inserted image

Under the Hood | Updated 7/3/2011 (ORIGINAL)
User-inserted image

#2

Unhappy with the results of directly mounting the arms to the servos, we started over using some very nifty chains and sprockets to offset things a bit. Also upgraded to HiTec HS-56HB servos for increased durability and their unique mounting options...

User-inserted image

User-inserted image

User-inserted image



By the way, you can get the miniature mechanicals at ServoCity:
Servo Sprockets (.1227)
Plain Bore Sprockets (.1227)
Plastic Chain (.1227)

#3

Dude, i totally LOVE that design. Serious kudos!

#4

You mentioned you were unhappy with mounting the arms on the servos, could you please give more details? How is direct mount different from the chain drive? I am working on a Wall-e project too.

Thanks

#5

I would have preferred directly connecting them for the sake of simplicity but the lack of space made for several structural compromises that weakened the mechanism a little too much for my tastes. Also, by offsetting the servos I was able to keep much of the original mounting components/design with slight Dremel/X-ACTO modifications. Yes, that means the arms still pop off at the shoulder joint so they can be easily re-positioned without messing with the servos!

That being said, since they are no longer connected directly, the effects of external wrenching or twisting to the arms should largely be absorbed by the arm mounts and chain before hitting the servos. A link in the chain (or the arm itself) should pop off before any serious (kinetic) damage can be translated to the servo. The HS-56HB servo's stronger gears should help in that regard as well. Mounting the servos towards the front also frees up that valuable accessible real estate towards the back for mounting bigger batteries and your EZ-B...

#6

Finally finished his left arm after an all-night miniature mechanicals marathon! In a state of delirium working on the other left and right arms now. Heheh...

Servos and sprockets... Oh me! Oh my!
User-inserted image

My what mini chains you have there...
User-inserted image

That'll do it Jerry...
User-inserted image

Lookin' good Gov'na!!
User-inserted image

#7

Great to see that setup in action! works very well Smile

#8

Got his alternate-location left arm linked in and working! One more to go...

My third arm...
User-inserted image

#9

Dude, that's some serious engineering Smile

What happened to your finger?

#10

Thanks... Just a few minor X-ACTO knife nicks - they were fresh and I wanted to make sure no chemicals got in during my Retr0brightening, especially since I was on my last pair of gloves and had already popped the tip for that finger!

User-inserted image