At the beginning of 2018, TLG has released a new series of Lego City sets, including the 60188 Mining Experts Site with a big drilling machine called The Crusher.
It’s some sort of a hybrid between a tunnel drilling machine and a bucket wheel excavator.

#Makeitbigger

 

I’m not a big fan of re-build/improve official lego set but a take one CITY set and #Makeitbigger in TECHNIC is surprisingly challenging. (A good idea for a contest in my opinion).

The Crusher XL’s MOC is not an exact upscale of the 60188’s Crusher, I built it like a “bigger” one, but still at minifig scale, with Bluetooth control through 2 SBricks and some power function elements:
- 1x Battery Box
- 6x PF-M Motors
- 2x PF-L Motors
- 5x PF-LEDs
- 3x 15cm cable extensions
- 1x 50cm cable extension

The main differences with the original model:
- The tracks are doubled and driven by a PF-M motor each.

- It is composed of two parts. The lower part is the vehicle. It is built on a cross structure with track at each side. The 11x11 rack from set 42055 are reused to rigidify the assembly and support the upper superstructure. (LDD on google drive here)

 

 

- The upper part is the superstructure. It can rotate nearly 300 degrees (the limitation is here to preserve the PF cable) and contains the electrical heart of the machine. The small PF-B battery box is place at the rear to be used as counterweight and completed with two boat weight (73090b);There is 4 motor and the 2 SBricks fitted in this little space to control the mains function.

 

- The cabin is a reuse of the 42055 set. It fits well to this model and defines the minifig scale of the vehicle. The position has been forwarded for the operator to have a better view.

 

- The arm is raised and lowered by cable actuated by a PF-M. A single cable is used between the two winches so it can accommodate the difference of position.

 

- There is no moving counterweight (‘cause it is ugly)

- The drilling head can tilt. It is mounted on a turn table and can turn to 360 degrees. The turntable is old and jam a little so the movement is not very smooth. Both drilling and tilting function are powered by a PF-L motor each.

 

 

 

The Video :

 

Possible improvements

 

There are some points I initially wanted to include in this MOC but they wouldn’t have fitted in this scale. So I keep them in mind if one day I decide to build a Mk.2 :

- 360 degree rotating track instead of a rotating superstructure: the challenge here was to find a means to control each 4 tracks separately (see picture below)
- Telescopic arm: why not ?
- Material belt conveyor between the dual drilling head like a bucket wheel excavator

Thank you for reading :)

Edited March 25, 20186 yr by Superkoala

I saw this last night! What an awesome MOC! This looks like it must have been an extremely fun build. All the functions work seamlessly and the base using the gear rings is excellent. 

very cool creation.  I think making official sets larger and better can be a lot of fun.  The rotating drill bit head is marvelous!

 

 

 

Very cool project! It looks great and is packed with functions. The contest idea is great, too. 

Is the counterweight in the rear enough? The picture showing the up-down arm movement makes it look as if the machine is heavier on the front. Maybe it's just an optical illusion. 

Awesome creation! Lots of functions, it works great! I was thinking that you should make the 2 pairs of tracks on either side independently steered, to improve the driving ability.

Love the contest idea too!

2 hours ago, BusterHaus said:

Very cool project! It looks great and is packed with functions. The contest idea is great, too. 

Is the counterweight in the rear enough? The picture showing the up-down arm movement makes it look as if the machine is heavier on the front. Maybe it's just an optical illusion. 

The véhicule is correctly equilibred, but i think my table isn't horizontal. I will check that.

Noticed I hadn't commented, this is an awesome build! I noticed this set on the shelf of a local store and liked it, but this is way better! I hope you continue builds like this!

Now that's a cool build! My boys would go nuts over this. If you add some half-pins on the drilling head you could actually use it on sand or snow 

1 hour ago, braker23 said:

Now that's a cool build! My boys would go nuts over this. If you add some half-pins on the drilling head you could actually use it on sand or snow 

Actually I don't really like the drilling head, but I made several try I didn't found how to make a good design in technic.

 

Edit:

Initially I wanted to use one of the Rover Wheel design in the folowwing topic, but I didn't had parts to do so, and did'nt want to order parts just for that.

 

Edited March 26, 20186 yr by Superkoala
Added info

looks great! Go BIG or go home!

 

Awesome moc. The functions work brilliantly. The looks are great. I love the size. I love it all!