remixed from the great work from [https://www.thingiverse.com/thing:1681442](https://www.thingiverse.com/thing:1681442)

see it move [https://youtu.be/rTlbqrB86YA](https://youtu.be/rTlbqrB86YA)

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big wheel: one side glued to the axle, other side tightened with screw (drilled a 1.8mm hole and use a 2mm screw); gear on the outer wheel is just used as spacer and also makes it look symmetrical; used 2x 2mm screws to tighten the drive gear to the wheel

axle: printed with support and brim - easily removed afterwards

motor support: use M4 30mm for assembly, use one M3 30mm for securing the motor - for now, please drill the missing holes in the model for connecting the motor support to brackets and mounts

new pin: redesigned the pin to be slimmer to allow tracks to move easily and now I have a moving Wall-E - now I used 35 threads per side, instead of 36

**nb: the motor support may change as I've noticed the drive gear may be too close to the ground and might get stuck in the tracks as they roll below it.

I use a radio-controller remote built with Arduino, similar to the one in this kit [https://www.amazon.de/Adeept-NRF24L01-Wireless-Robotics-Guidebook/dp/B06XF5J52J/](https://www.amazon.de/Adeept-NRF24L01-Wireless-Robotics-Guidebook/dp/B06XF5J52J/)

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BOM for eWall-E:

Arduino Nano [https://www.amazon.de/Elegoo-Entwicklerboard-Arduino-Atmega328P-CH340/dp/B0713ZRJLC/](https://www.amazon.de/Elegoo-Entwicklerboard-Arduino-Atmega328P-CH340/dp/B0713ZRJLC/)

Radio Module NRF24L01 [https://www.amazon.de/AZDelivery-NRF24L01-Wireless-Arduino-Raspberry/dp/B06XJN417D/](https://www.amazon.de/AZDelivery-NRF24L01-Wireless-Arduino-Raspberry/dp/B06XJN417D/)

2 Gear Motor Dual Shaft [https://www.amazon.de/dp/B06XSJS8W6/](https://www.amazon.de/dp/B06XSJS8W6/) use motor2_hat_gear for it

L9110S H-Bridge Dual DC Stepper Motor Driver Controller Board for Arduino [https://www.amazon.de/iHaospace-H-Bridge-Stepper-Controller-Arduino/dp/B07PKC4FFG/](https://www.amazon.de/iHaospace-H-Bridge-Stepper-Controller-Arduino/dp/B07PKC4FFG/)

2x 3.7V rechargable batteries

--next step

3x servos: 2x for hands, 1x for head

Sound support [https://www.amazon.de/Cylewet-DFPlayer-Mini-MP3-Player-Modul-unterstützt-TF-Karten/dp/B071147RGH](https://www.amazon.de/Cylewet-DFPlayer-Mini-MP3-Player-Modul-unterstützt-TF-Karten/dp/B071147RGH)

BOM for Arduino remote for eWall-E:

Arduino Nano [https://www.amazon.de/Elegoo-Entwicklerboard-Arduino-Atmega328P-CH340/dp/B0713ZRJLC/](https://www.amazon.de/Elegoo-Entwicklerboard-Arduino-Atmega328P-CH340/dp/B0713ZRJLC/)

Radio Module NRF24L01 [https://www.amazon.de/AZDelivery-NRF24L01-Wireless-Arduino-Raspberry/dp/B06XJN417D/](https://www.amazon.de/AZDelivery-NRF24L01-Wireless-Arduino-Raspberry/dp/B06XJN417D/)

2x analog joysticks w/ push buttons -or- just push buttons

2x pots for trimming speeds -or- none if you don't care for it

4x push buttons -or- none for less function

2x 3.7V rechargable batteries

(unfortunately, I didn't have time to draw the schematics yet)

--

notes:

• the track plates won't work if they are stiff so check your prints! - I used flexible material for threads but those tend to get loose from pins after a while - might try a mix of flex and PLA to see if it works better - it didn't
• the tracks work with a redesigned 'slimmer' pin

Arduino source code [https://github.com/lmirel/eWall-E_r](https://github.com/lmirel/eWall-E_r)

Category: Robotics