[MOC] Excavator Volvo EC300E in 1:17

[Nura]

Hello Eurobrickers,

It took a long time and now this MOC is finished, for now.

This is my creation of a Volvo EC300E crawler excavator at a 1:17 scale using LEGO Technic parts and third-party electronics. The model took several years to develop, with challenges such as drive and boom lift issues at early exhibitions.

Built from about 2,600 pieces and weighing around 2.7 kg, the excavator is powered by eight LEGO Power Functions motors, controlled via three SBricks and Bluetooth. Two custom pneumatic units by sariel.pl allow remote tool changes and additional functions. Custom 3D-printed buckets, lighting from bricktec-lights.de, and self-made decals complete the build.

In addition to the SBricks, seven of the excavator's eight motors are hidden in the upper carriage:
– two PF-M motors, independent for the undercarriages,
– one PF-XL motor for the boom,
– one PF-L motor for the dipper,
– one PF-M motor for the upper carriage rotation,
– two PF-M motors for two independent pneumatic pumps.

The eighth motor is located in the boom for space reasons. It operates the bucket cylinder.

Take look inside:

 

and yes, the fan is running with the second pneumatic pump.

A YouTube video showcases the model in action:

 

Hope you like it!

 

[Timorzelorzworz]

This looks excellent.

[2GodBDGlory]

Very nice! It looks good, and the pneumatic coupler is a very cool way to set it apart from other excavator models.

[jorgeopesi]

Love it great movement and speed congratulations.

[Jundis]

@Lego: Please take note and repeat after Nura, thats how to do an excavator!

Holy moly, what a great model. The movement is so fluent, and the custom buckets are lovely. Great work!

[Paul B Technic]

This is awesome. Great features and level of detail.

[1gor]

8 hours ago, Jundis said:

@Lego: Please take note and repeat after Nura, thats how to do an excavator!

I can only repeat that. @Nura extraordinary build. 

[Saruzeufel]

Stunning MOC! The quick coupler is such a nice feature. Also impressive reach on the boom and still decent speed. Must have taken forever get it just right like that

[Nura]

Thank you all so much!

11 hours ago, Saruzeufel said:

Also impressive reach on the boom and still decent speed. Must have taken forever get it just right like that

The speed matching was a lucky find. All functions are 1:1, meaning there's no gear ratio. I only geared the XL motor for raising the boom to 1:1.25. 

Only finding the right angles for the linear cylinders took some more tests.