[TC8] [WIP] MOD on Liebherr LTM 1250

[chubays]

Hi!

The initial idea at me appeared long ago after I saw Sariel Future Plan to build Libherr 1250.

There was a wish to OVERTAKE Sariel.

But then I only thought up the concept and considered couple of concrete knots, without having assembled this crane.

Now I will try to finish it with some redesigning. And of course it is competition so someone has to lose!

And all others are too good for loss!

At first I was puzzled with steering opportunity both to turn, and to go sideways (crab).

Moreover I was inspired in many respects by Grove GMK6400 Mobile Crane by Blakbird, gerger and others.

First I planned to make two cariar options: with and without suspension and both with instructions !

But I didn't calculate the forces

Here some screenshots of LDD for todays project.

O!!!

And EVERY outriger works separate!!!

AND there still only 8 PF chanels!

[Saberwing40k]

Looks ambitious. But, your steering system might have issues with slack, and gear racks not centering correctly. I still wish you the best of luck with this.

[chubays]

Looks ambitious. But, your steering system might have issues with slack, and gear racks not centering correctly. I still wish you the best of luck with this.

I use servo motor for steering, so it turns to center correctly.

[aminnich]

Wow, that thing is massive! I am wondering why all of the outriggers are going to be separate? is it so it is more like the actual crane. If so that if a lot of extra for a small function. But it will give your crane an extra touch, nice idea!!

[chubays]

I am wondering why all of the outriggers are going to be separate? is it so it is more like the actual crane. nice idea!!

Thank you!!!!

Yes it's separate like in real mobile crane!

I have to make this gearbox for it:

[aminnich]

Personally i think if you are going to do this, i should not make it remote control. Actually have the gear selected by hand. it does not look like you are doing it this way, but i still love the idea. You would not think that it would really count, but it really does. Great idea dude!

[chubays]

aminnich

This gear box is version 3.4 or even 3.5 and first I made it in real (sorry no photos yet) test it and only then make it in LDD!

Edited October 11, 2015 by chubays

[chubays]

Well...

Very heavy night or even two on final realization thought up in Lego is necessary to me.

That is to collect everything completely, not in parts!

In parts everything works remarkably!

Here some pictures of a mechanical component of base of the crane without superstructure and a boom:

(I used models for L and Servo motors as they aren't present in LDD)

[bonox]

Looks very interesting. It will be exciting for you to see if the real thing meets your expectations.

[2LegoOrNot2Lego...]

Looks very interesting. It will be exciting for you to see if the real thing meets your expectations.

Agree with that at all!!! Very impressive build so far!

[chubays]

Hello!

I think I will not finish my model till 1 of November...

I am very sorry!

If I wouldn't - I will leave the contest!

I'll add Video later!

Explanation about steering/outriggers changing mode:

Mode 1: normal steering, front outriggers

Mode 2: crab steering, rear outriggers

[aminnich]

That thing is huge!! And a lot of functions to need all those remotes, nicely done sir!

My only question is are the 2 XL motors big enough to move it ?!?!

[chubays]

nicely done sir!

THANK YOU!

My only question is are the 2 XL motors big enough to move it ?!?!

Sure yes! Video will be ready little later!

[aminnich]

Sure yes! Video will be ready little later!

I'll be waiting haha. Im really impressed with the change from LDD to bricks!!

[2LegoOrNot2Lego...]

Whether you make it or not...it is an amazing build and you should finish it some day... :thumbup:

[chubays]

Edited October 24, 2015 by chubays

[aminnich]

It works pretty good, i must say. I like the how the outriggers are extended seperately like a real crane. I also like the different steering modes. 1 question for ya;

Is it true crab steering?

Also, im a little concerned with the amount of gear crunching i hear, im not sure which function(s) it came from tho.

Overall nice job

[chubays]

It works pretty good, i must say. I like the how the outriggers are extended seperately like a real crane. I also like the different steering modes. 1 question for ya;

Is it true crab steering?

Also, im a little concerned with the amount of gear crunching i hear, im not sure which function(s) it came from tho.

Overall nice job

As far as I know it is...

Crunching is from mode changing, small gear (8) and worm gear.

I use the system like

http://www.brickshel...ry.cgi?f=555022

BUT I used 4, not 3 shafts and motors and fifth motor for switching!

It is red in post #8

This fifth motor also moves Servo Motor using small LA.

[aminnich]

true crab steering has the same angle steering for all the axles, i could not quite tell from the video.

[chubays]

true crab steering has the same angle steering for all the axles, i could not quite tell from the video.

I used same gears and same racks.

Different angles because of some friction of wheels about a surface.

Edited October 24, 2015 by chubays

[bonox]

wow - very impressive steering mode change. Well done!

I look forward to seeing the rest of it come together and I hope you will finish it even if you can't make the competition deadline.

[super-jaschka]

very nice

[chubays]

Hello!

As I sad before, I will not finish it until deadline, now that's because of the boom!

I can use slightly changed 6 section boom from GMK6400, but thats not fair and my own boom will not be finished...

So now I want to understand who want's this MOC to be finished (except me )

[aminnich]

UM... I DO

Keep building!!!

[super-jaschka]

Go on! I would like to see the MOC ready.