oracid

This is a good idea, but difficult to do. I use to use the ref. 4185 when possible. Of course, a new piece would be welcome.

Are you sure ! ? At 0'20" in the first video : Left Front Leg - Left Back Leg - Right Front Leg - Right Back Leg

The AT-AT has a gait that I would call the camel gait. One side, then the other side. It is this gait that marks the recognizable style of the AT-AT. I invite you to watch these 2 videos. https://youtu.be/GUsOouwjsL4?si=c3JUcEu3YiOGfX_W https://youtu.be/bv_cE58WMzs?si=be5C6v1HG8mwgW19

Moving on a plane is not an obligation. There is nothing to prevent you from using this technique to make what I would call a wrist. Here is a video that shows this possibility. https://youtu.be/3fbmguBgVPA?si=vd-vmWGNSk8QwJoS

Yes, it works ! Sorry, I didn't realize it was an animated GIF.

This looks very interesting. Congratulations. I'm looking forward to the video.

Unfortunately not. My quadrupeds use a gait based on trotting. This gait is based on a 180° phase shift between the front and rear legs, and left right. This is the easiest gait to implement with servos and independent legs. In your case, I would try to study the gait of walking with an ultra simplified mechanism with a single and small motor that you could then apply to your AT-AT. The video posted by @Davidz90 is an excellent basis for reflection, even if it is based on a Theo Jansen mechanism which is quite complex. In my opinion, the enemy is weight and the secret to success is to start small.

Can you tell me what its weight and the dimensions between wheel axes (length and width) ?

And they are protected in the event of a torque overrun.

I wonder if there is a microcontroller inside the Mould King Power Module 4.0. It is probably not open source, but if the microcontroller is common, then maybe someone with the skills could program it.

Very good work ! I use to use GeekServo with 2S (7.4V to 8.4V) battery. It works very well.

I think not. I made and I use a 25L liftarm, it is not fragile at all.

I hope you enjoy watching this video. Beware, sensitive soul, refrain.

You are welcome and your information is very valuable. Thank you.

For @Krxlion. This morning, I have tested a Gray GeekServo with a FlySky FS-i6X transmitter and a FS-iA10B receiver. The servo has a 180° travel. The link to this RC radio control : FLYSKY FS-i6X élasticité i6X 10CH 2.4GHz AFHDS pipeline RC émetteur avec récepteur iA6B ou iA10B pour importateur avion - AliExpress 26 Note: A 2S battery has a nominal voltage of 7.4V, but when fully charged, it reaches 8.5V.

My knowledge of Radio Control is very limited, but it seems to me that it is not impossible that an RC transmitter can send the parameters of the operating range to a servo. Maybe someone here could tell us more. The allowed voltage is from 4.8V to 6V. Personally, I use it in 2S (7.4V/8.5V), but it is at my own risk. A higher voltage increases the torque, nothing else.

It would be great but unfortunately this is not. As far as I know, a GeekServo has no memory.

This is just out. It's the marriage of a servo with a DC motor. I don't know much about this kind of motor, but I thought it might interest you, especially since the assembly is Lego compatible, which is always the case with M5STACK. https://shop.m5stack.com/products/roller485-unit-with-bldc-motor-stm32?mc_cid=7bb51ca148&mc_eid=4f7d23ce1c&variant=45585634754817 https://shop.m5stack.com/products/roller485-lite-unit-without-slip-ring-stm32

I have already tryed 4 XL motors vehicle with the DC motors shield (link above) and RC remote control. And I had no problem.

If you are considering an Arduino solution, you can use an UNO with this Shield for DC motors: https://fr.aliexpress.com/item/33052386718.html?spm=a2g0o.order_list.order_list_main.82.79285e5b8D92md&gatewayAdapt=glo2fra or you can use a Nano with this Shield for GeekServo or any RC servo : https://fr.aliexpress.com/item/33063354279.html?spm=a2g0o.store_pc_home.promoteRecommendProducts_11403406.33063354279&gatewayAdapt=glo2fra

I have many of those. They come from China.

I have found this very good old video. May be it can help : https://youtu.be/GUsOouwjsL4?si=6RoTRfLsZ3mw1EF6

I am very impressed by all this posts, thank you @Toastie. For my part, my skills in Buwizz, Lego servos and smartphone remote are zero. I only use RC remote and servos, controlled by Arduino. Sorry.

Details : If you want to use the Grey GeekServo to 0° to 180°, you must code servo.attach( pin, 500, 1500 ); if you want to use the Grey GeekServo to 0° to 360°, you must code servo.attach( pin, 500, 2500 ); I have tested the torque of the Grey GeekServo at 180°, I measured 3.95kg.cm (almost 4kg.cm). You must consider that this is very good.

No ! Those are default values that you can change. You just have to use the function servo.attach(pin, min, max) in your code. Here : Servo - attach() - Arduino Reference Please consult my code in the video at 15'00". If the values 500µs and 2500µs are not good for 0° and 360° or 180°, you can ajust them. That is the goal of .attach() function.