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Posted (edited)

Inspired by the Volvo EC750
Excavator with the new Powered Up motors
All motors in the rotating platform
Tracks with subtractor mechanism and two differentials
Tensioner regulated tracks

 

Edited by Flybum

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Awesome excavator :wub_drool:

Have you got any WIP pictures or pictures of the internal mechanisms?

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Thanks!
Not yet. I finished building it yesterday, but I can take new pictures if you have any suggestions.

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I appreciate you made a subtractor mechanism.

Unfortunately, many designers ignore this important function.

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Very nice looking excavator :classic::thumbup:

Are you using the new longer linear actuators from the Liebherr?

 

Also, please add "[MOC]" to your thread title, thank you.

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1 hour ago, Parazels said:

I appreciate you made a subtractor mechanism.

Unfortunately, many designers ignore this important function.

I made this MOC after building the Liebherr 42100.

I don't know if the real Liebherr has two motors connected directly to each track as in the Lego model. But I wanted a more common solution, with all the engines inside the rotating platform.

And not two engines, but only a main engine that moves both tracks and a second engine that moves the subtractor.

54 minutes ago, Gray Gear said:

Very nice looking excavator :classic::thumbup:

Are you using the new longer linear actuators from the Liebherr?

 

Also, please add "[MOC]" to your thread title, thank you.

Thank you
Yes I used many pieces of the Liebherr 42100. Four of the long actuators, which are more robust and practical than the old ones.

Also all seven engines and two Liebherr hubs.

Added "MOC" to the title, thanks

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Very very nice!

So the subtractor is inside the rotating platform and there are two axles going, down one for each track.

Pictures please!:sweet:

Also show us the tensioner from the tracks.

By the way, are you commanding it with the lego app? Since you´ve used all the motors...

 

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44 minutes ago, Oliver 79 said:

Very nice. It's huge! 

Definitely would like to see some more pictures. :wub:

Thanks

Actually weighs 3.8 kg and came a little bigger than the Liebherr Lego 42100.

You can see the real dimensions in the picture

I am not allowed to upload more than 0.1 MB, maybe because I am a new member here :hmpf:
 

EC750D - Dimension Control C.jpg

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7 minutes ago, vascolp said:

Very very nice!

So the subtractor is inside the rotating platform and there are two axles going, down one for each track.

Pictures please!:sweet:

Also show us the tensioner from the tracks.

By the way, are you commanding it with the lego app? Since you´ve used all the motors...

 

Thanks
Subtractor: no, if it were inside the rotating platform you would have an asymmetrical guide for the tracks, because you need two concentric axes that go down.   So for me it's better: two motors in the rotating platform, one axis for the main motor and the other concentric for the subtractor.

Sorry, I  am not allowed to upload more than 0.1MB for now

The tensioner is made from a 6.5 L Technic shock absorber with normal spring. The track axis with tensioner is movable on a slide inside the track cover

I don't use the lego app because I prefer to use a controller with the physical stick instead of the touch controls on the phone. So I use Brickcontroller2, a beautiful Android app. It allows you to connect for example an XBox controller and all lego engines, even the old ones
 
 
 
 
829/5000
 
 

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11 minutes ago, Flybum said:
Sorry, I  am not allowed to upload more than 0.1MB for now

Nobody is allowed for more than 0.1Mb. 

You have to put your pictures somewhere else and past the link to it here. 800x600 max.

I use bricksafe, it is cool, but flickr, <whichever>drive... all will do.

There is a topic about pictures somewere in the forum.

Ok, subtractor in the undercarriage, motors above. Seems cool!

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If you guys are interested, I uploaded a new video of my excavator here:

 

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Hello, will the instructions be available for the whole moc? cordially

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BTW do you have Parts list for the upper superstructure? So i can collect them while waiting for your complete instructions? 

Tnx 

I already assemble Track and Subtractor 

its cool 😎 

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I am still testing this moc. Lego Technic allows you to do the same thing in very different ways, and I like to find the best one. So I'm gonna take some time to perfect it.
For the moment I've made the instructions for the less common aspects. I definitely want to give the instructions for the whole thing, but it depends on my free time. Please be patient, and any suggestions for improvement are welcome.

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I posted a new video showcasing the digging capabilities of my excavator. I am happy with this test.:classic:

 

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Uploaded the instructions for the Main body of the excavator on Bricksafe

https://bricksafe.com/pages/Flybum/lego-volvo-excavator-moc

It is a compressed file, unzip it to get the pdf file.

This is the most challenging of the modules. Instructions for the others will follow shortly.

The modules can be quickly connected together to get the model working.

I will upload on Youtube an overall picture as soon as ready.

 

1-MainBody_c.jpg.11559fee738c3a55152618f1cd77fdd4.jpg

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Posted (edited)

Digital model completed.

You can find rendering and a summary of the model here:

 

Edited by Flybum
Changed YouTube url to extended format

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Amazing model. I like especially the modular construction.

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