#21

12/18 Update

I am not happy with the speed of the dome rotation using the pinion gear and a continuous servo. Too slow. I am going to make a tray and use a Standard Servo for now. If I decide to go more than 180 degree rotation, I may modify the servo with an external pot and pull the pin out of the gear to get the extra rotation. I will post pictures once I complete assembly and tests.

Ron R

#22

12/18 Update

Dome actuator

I built a tray and mounted a Standard Servo to drive the dome. I used the standard JD shoulder servo arm and made an arm which slides into the servo arm and extends out to two standoffs on the outside ring of the dome bearing unit. It works great. If I decide to make the dome rotate more than 180 degrees I will modify the servo with an external pot and remove the stop pin.

I cut some holes in the bearing plate to allow the led, camera and other wires a way to pass from the dome to the ezb.

Stl files:

8_mm_thk_servo_tray.stl

domearm.stl

Pictures:

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Enjoy

Ron R

#23

Update: 12/21. I did a mock up and tested the drive. I had to relocate the battery to the same place on the front shell. This way the weight was more forward eliminating wheelies and allowed better steering. I made a new front leg and foot which will mount easier and is a little heavier. I wired up some led.s and mounted them in the dome. My last issue is how and where to mount the camera. Once that is figured out and done I will post all the pictures of what I did so far.

Ron R

#24

12/22/15 Update:

Camera installed and leds are in the dome.

Wiring is connected and final assembly is done for testing.

I am still trying to print a front foot to my satisfaction. I had two failures and hope this next one will be ok. I need better filament instead of the stuff I am using.

Next will be a movement test and a check to be sure everything works. I will post a video, (no way like Steve G makes …. LOL… I’ll be lucky to keep stuff in the frame.) if I can. The Holiday is going to take over my time.

Ron R

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#25

Your conversion looks fantastic!

I picked up the electronic version of this from Costco and have been slowly making it more scale. In case your interested I have been working on a bearing supported shoulder pivot for it. With the eventual goal on making the center foot retractable.

http://www.thingiverse.com/thing:1239839

It's still a work in progress but I've just about nailed it.

#26

Hi @outcastrc,

Thanks for the information. I appreciate the conversion and will plan on using it in my next upgrade.
Except for a couple of wiring changes I want to do, my R2D2 is running. I plan on putting up a video of the basics I have so far. He is limited on function right now, but I plan on more scripts for him. Due to the Holidays I had to stop for a while but I will soon start working on it.

Post some pictures of yours. I didn't know Costco had an electronic version and would like to see what you have done.

Ron R

#27

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The Costco electronics are pretty simple. Coin slot push button, sounds, flashing lights in his dome, and it spins the head back and forth. His one leg hops up and down as well. I'll most likely use the limit switches, the head motor system, and speaker but everything else is getting turfed.

In between shoulder prototypes I have been printing 40% scale stls from astronmech.net to enhance the droid where Jakks Pacific fell down in the design.

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#28

I have in this thread, an .stl file of the foot and front leg which is pretty detailed like the original. The scale is pretty good. Take a look.

Unless the motor/ gearbox is pretty fast, you may want to look at a servo direct drive to the dome. I found it more realistic than a gearbox/motor and what is nice you can stop in position. No need for the limit switches.

Have Fun with your mini R2 !

Thanks for the pictures of the Costco one. My original ideas were correct.

Ron R

#29

Hi Andy,
Did you ever make a video of your Walmart R2D2?
When you get the chance, email me. Email listed on my user/settings page. Thx.

#30

Hi @rgordon,

I have been waiting for the compass issue to be resolved so I could work on the navigation portion of R2 before I posted a video. He does run well in voice command mode (forward, stop reverse, left and right ) camera tracking works but not fully tuned, and dome lighting and rotation works well.

I really want to get the compass installed and maybe some pings so he will be able to roam and navigate to different areas by command. I put him on the bottom of my project list until the compass issue gets resolved.

He has come out as planned overall and will be a good companion.

Ron R

I couldn't find your email.