Anto

[MOC] RC Excavator powered by BuWizz

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One BuWizz, it's good. But two, it's better, because you can make MOCs having 8 functions! :laugh:

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I have already done a full RC compact excavator, but with LEGO IR receivers. I wanted do make another excavator without the gearbox allowing to choose between the rotation of the arm and the pneumatic pump. Furthermore, the M motors were just enough powerful to move the arm.

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On this new excavator, it's different. I tried to make the mecanic as compact as possible. And the arm is controlled with more powerful motors: 1 L and 1 XL.

So now you can... dig on gravel with a GoPro attached on the arm, and the motors bear that easily! There is a good speed and so much power to do anything you want! :classic:

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For the design, I tried to cover the maximum and I kept a color scheme close to the one of my previous excavator.

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To switch on the BuWizz of the turret, you need to open the part behind the cab. The hood is also openable, but there is nothing interesting to see. ^^

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So the functions are:

-> Controlled by the bottom BuWizz:

  • Left track (M motor)
  • Right track (M motor)
  • Blade (M motor)
  • LEDs (of the cab and the arm)

-> Controlled by the BuWizz of the turret:

  • Turn table (L motor)
  • 1st part of the arm (XL motor)
  • 2nd part of the arm (L motor)
  • Bucket (M motor)

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You have certainly noticed that there are shock absorbers. It's for the tension of the tracks.

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The LEDs:

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And the video! The BuWizz are in Fast mode and I used the app BrickController, done by @imurvai. It's perfect for this MOC! :classic:

 

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Beautiful model with very nice styling, and nicely working functions. The proportions make the model seem smaller than it is, I love it!

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This MOC looks great! I noticed a bit of vibration on the arm in the video - is this caused by the u-joints being close to their bending limit? 

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An excellent looking machine! I love the details in the cab, and the overall functionality achievable with the Buwizz boxes is impressive. It's a shame LEGO don't make more reasonably sized buckets, it's the only thing that lets this model down for me.

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Thank you! :classic:

 

On 18/04/2018 at 3:56 PM, BusterHaus said:

I noticed a bit of vibration on the arm in the video - is this caused by the u-joints being close to their bending limit? 

You're right. The U-joint is placed 1 stud behind the pivot point of the linear actuator. So in some positions, as the U-joint is not homocinetic, that causes vibrations when the bucket is not loaded. But I didn't find another way to do this part of the arm.

 

On 18/04/2018 at 6:26 PM, ColletArrow said:

It's a shame LEGO don't make more reasonably sized buckets, it's the only thing that lets this model down for me.

I agree. There is no bucket for the excavators of this scale... :hmpf_bad:

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Very interested in building this little guy.  Your last one you were able to complete instructions.... any plan to do the same with this guy?

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this thing is awesome! it digs so well. the motors were quite nicely hidden in the arms for me until I saw the schematic pictures :thumbup:

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Thanks!

I finish the LDD file when I have time for that, and then I tell you when the file is available. :classic:

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