[MOD] 42009 Mobile Crane - MODs and Improvements

[Blakbird]

I have started reordering axle one which I am 50% through,after that I will then add the fancy stuff to it to improve quality.

I was wondering what kind of progress has been made so far on stepping the file for the Grove crane. I have completed collecting the parts and am eager to get started building. I don't mind doing some stepping myself, but I don't want to repeat any work that has already been done.

[Alasdair Ryan]

I am afraid I have not made too much progress.

I have nearly finished stepping the first axle.

Edited July 23, 2014 by Alasdair Ryan

[nerdsforprez]

Hey All,

Here are my modifcations to the 42009. Really, it is a whole new beast, and I tried to mimic the Liebherr 1500 8.1 mobile crane. Added a jib and weights for stability.

I really tried to enhance the strength of the model. As can be seen from the video and pics on the URL provided, adding strength can be done. It was able to hold my version of the 8070 (around 1500 grams) without problem. However, lifting the model was still difficult; the motor is just still too weak, even with the added help of the mechanical advantage provided by the pulley system. Check it out:

http://mocpages.com/moc.php/388884

http://mocpages.com/moc.php/383148

[neoconagenda]

Great job, Ialso like your B-Wing mods!!!

[kamsohal]

wow thats very good any reccommendations on how to make that?

[Henk61]

It is looking great!!! I had already build the Original 42009 and the 42009 extended version.... but I do want to build this super extended model... any change of building instructions??

[m0dulo]

Check it out:

OK, that is a great video about a cool project, but what is the secret to that clean, empty room in your residence?

[cheeze]

Cracking mods nerds. Is there anyway to add gearing to the motor to increase mechanical advantage? On my crawler crane I built. I have a xl motor running my winch via a few pulleys via elastic bands then a 8tooth- 40 tooth gear. I've lifted 5.5kg using this with the same amount of line drops on the hook. My boom head and hook have 16 pulleys on each...... I'm not looking forward to reeving that!

[nerdsforprez]

It is looking great!!! I had already build the Original 42009 and the 42009 extended version.... but I do want to build this super extended model... any change of building instructions??

Yea, unfortunately there were lots of changes to the building instructions. As mentioned, it was a pretty much new beast altogether. I had to add a whole new level of the chassis, and with the outriggers and all that was a task. The inside motors and battery box are all moved, and therefore all axles and internal gearing are also moved.

[rollermonkey]

Jiminy Christmas! And I was getting all excited because I almost have enough parts to do Jurgen's Ultimate.

Almost. Couple PF items are still back-ordered.

Edited August 7, 2014 by rollermonkey

[nerdsforprez]

Yea... truly, the best thing to do is exaactly what you mentioned. The mechanical advantage on the pulleys is one thing, but regearing the motor would be a better thing to do at this point. I am on other projects right now... but I am sure that I will attempt it at some point in the future.

Cracking mods nerds. Is there anyway to add gearing to the motor to increase mechanical advantage? On my crawler crane I built. I have a xl motor running my winch via a few pulleys via elastic bands then a 8tooth- 40 tooth gear. I've lifted 5.5kg using this with the same amount of line drops on the hook. My boom head and hook have 16 pulleys on each...... I'm not looking forward to reeving that!

[SilenWin]

After a week I finished building gerger's crane, and I think it's really awesome!

Massive construction, fully RC, all wheels drive and independent suspension - all this is so cool!

Here is other photos: http://s48.photobuck...slideshow/Crane

Many thanks to the author of this brilliant MOC, as well as to all those who participated in the creation LXF model!

[gerger]

Hi guys, I have been revising bit and pieces on the chassis after some months of “serious play” with my 1 year old son... The revision focuses mainly on PF efficiency and stability. The above process has undergone several rounds and here you are all updates at once.

Steer:

- align steering axis for more responsive turns

- guide all steering racks now

- better and more simple bracing for worm gears steering

Outrigger:

- redesign outriggers modules to give spaces for steering axis alignment

- adjust outrigger extension gear ratio , strong and slower now

Drive:

- brace all driving gears and replace axle 4 with stop (#87083) into axle 4 with central stop (#99008) to avoid falling gears from differentials

- move XL motors 1 stud to the front to avoid contact with front wheels during turns (and give space for additional spring absorbers as well)

- revise motors mounting for more stable gear meshing

Chassis

- add wheels to smooth out turntable rotation

- revise and simplify wheel fenders to fixed one

- additional spring absorber at 1st axle to carry the heavy load at cabin (4 at 1st axle; and 2 per next axle, 14 in total)

- re-work cabin and tail mounting to avoid loose parts.

I rearrange the LXF file grouping as decomposable and logical as possible. Let me know if this works better for covert/stepping process for instructions. Please noted 14 springs absorbers are missed out due to current LDD4.3.8 bugs.

After a week I finished building gerger's crane, and I think it's really awesome!

Massive construction, fully RC, all wheels drive and independent suspension - all this is so cool!

Here is other photos: http://s48.photobuck...slideshow/Crane

Many thanks to the author of this brilliant MOC, as well as to all those who participated in the creation LXF model!

nice color! too bad that it took me some time to coming up with the revised version and sub-divide the groups in lxf files... or this white crane would be perfect! still look awesome.

Edited August 12, 2014 by gerger

[Eigenbroetler]

so i guess you made it difficult for the guys making the instructions when you revised your previous design?

[SilenWin]

It was not so difficult to build it, but sometimes I used to disassemble some completed sub-modules and reassemble them again. It was necessary to connect several modules (eg axles).

Can't wait to start building new version, I'm sure it will be a another fantastic build!

Edited August 12, 2014 by SilenWin

[gerger]

so i guess you made it difficult for the guys making the instructions when you revised your previous design?

That's what I worried too.. I read the above that not too much progress have been made in stepping, therefore I further sub-dividing the updates into smaller groups to a level of about 10 pieces each, such that either scratch building in mlcad would be be a nice option. of course if Blackbird is ok to do another conversion, I can actually do the stepping in LPub

It was not so difficult to build it, but sometimes I used to disassemble some completed sub-modules and reassemble them again. It was necessary to connect several modules (eg axles).

Can't wait to start building new version, I'm sure it will be a another fantastic build!

the updates got nothing much different in appearance but smoother in the PF and less fix time after play. I re-arrange the lxf to minimize reassemble between modules this time, hope it works.

[SilenWin]

the updates got nothing much different in appearance but smoother in the PF and less fix time after play. I re-arrange the lxf to minimize reassemble between modules this time, hope it works.

Sounds good :)

And do you make some changes in the boom or superstructure constructions? Is it necessary to rebuild it?

[Eigenbroetler]

Anyone care to do a brickstore parts list of ver 2? :)

[Zimix]

Yep I'm in the process, will publish it soon. However I'm not 100% for the PF elements which or not availabe in LDD. But the funny color parts will be removed (place holder for PF elements)

edit:

Here the Brickstock / (Brickstore) file for the revised 2 of gerger's lxf file.

edit 2:

file moved to new location

Edited September 21, 2014 by Zimix

[Blakbird]

so i guess you made it difficult for the guys making the instructions when you revised your previous design?

That's what I worried too.. I read the above that not too much progress have been made in stepping, therefore I further sub-dividing the updates into smaller groups to a level of about 10 pieces each, such that either scratch building in mlcad would be be a nice option. of course if Blackbird is ok to do another conversion, I can actually do the stepping in LPub

It is true that not much stepping has been done, however the conversion from LDD to LDraw took a couple of weeks of solid work. Unfortunately, unless there is a way to extract just the changes, I'd pretty much have to start over and do it all over again. On the other hand, maybe the new groups in LDD are good enough that the conversion is not necessary. More groups makes things easier in LDD, but actually makes conversion to LDraw harder because each group has to be exported individually and then reassembled into the whole. I wish LDD would export the groups as submodels.

I've already collected all the parts for this model, so maybe I will just build the first version. I'll have to take a look at the changes and decide.

Gerger, if you would be willing to make some pictures of exactly what you changed, then I could modify my existing LDraw file instead of starting the export from scratch. If the mods are too extensive to do this, then don't worry about it.

[grego18f]

Hi all

@Gerger: Very nice mod you've done here

I modded the 42009 into this liebherr LTM model ( I'm not very sure of the model, I think an old LTM 1220):

Here are the pics:

The changes are:

- the space between axle 1 and axle 2 is 2 studs shorter than the original one;

- the motorization of the outriggers has been disconnected to the superstructure, I added a motor in the frame as Efferman;

- and aesthetical changes.

The final project is this LTM 1220 5.2:

Hope you will like it.

[gerger]

It is true that not much stepping has been done, however the conversion from LDD to LDraw took a couple of weeks of solid work. Unfortunately, unless there is a way to extract just the changes, I'd pretty much have to start over and do it all over again. On the other hand, maybe the new groups in LDD are good enough that the conversion is not necessary. More groups makes things easier in LDD, but actually makes conversion to LDraw harder because each group has to be exported individually and then reassembled into the whole. I wish LDD would export the groups as submodels.

I've already collected all the parts for this model, so maybe I will just build the first version. I'll have to take a look at the changes and decide.

Gerger, if you would be willing to make some pictures of exactly what you changed, then I could modify my existing LDraw file instead of starting the export from scratch. If the mods are too extensive to do this, then don't worry about it.

The changes are quite extensive, especially for the outriggers part... As I have done the lxf sub-grouping into fairly details, I might as well start looking into LDD to LDraw conversion, which I did last week :)

The good thing about the conversion is that it gave about 90% relatively correct pieces & locations but the order are just a mess! I need to go through every single part and cross check with the lxf/ models and so far it's still manageable. Here is 25% done stepped file and I have a few questions that need help in order to speed up the stepping process.

- How can I read the stepping from multipart files? when I export sub-models one by one and did the stepping WITHIN the sub-models, LDview can show it, but once i made a multipart ldr and drag different sub-models into one, the stepping gone in the master file..

- When I group (Ctrl+G) several parts, how can I re-open the group and edit?

- How can I adjust shock absorber length?

Attached here also the stepped sub-models ldr for reference. Any recommendation or quick fix are appreciated. I think it might take another 3 weeks in order for me to complete the remaining 75%. finger crossing.

Sounds good :)

And do you make some changes in the boom or superstructure constructions? Is it necessary to rebuild it?

no change to boom or superstructure construction, except only adding wheels as this:

[Leif]

Dear all,

Long time lurker, first time poster

first things first, my homework, here is my presentation: http://www.eurobrick...showtopic=99069

Even though this thread recently has been the subject of Gerger's mods and the work around this, I hope that my try of modification fits here as well.

Bear with me, this is my first Lego in 30 years, and my first ever with studless pieces!

My builds are so far not really MOCs, more "mockups" or "POC (Proof of Concept". Having said that, my build is not a beauty, nor a finished model.

My first purchase since I became an Afol was the 42009. after that I, of course, built the Ultimate 42009 and after that added the Extended Boom as well. I am following Gergers work and I hope to build a 6 axle or even more in the future as well.

I have never really liked the extension of the third part of the boom, using the thread.

First of all, you don't wanna extend the third, and weakest boom at all times, second, the thread thinking is, at least for me, not really technic..!

So, having said that, I have built a boom, based on the Extended boom we have seen here before, where the third part of the boom extends individually using worm gear and rack gear, just like second part.

The clever thing - at least for me - was to use the spare part in the set, the read 8 tooth sliding gear, together with the 32L axle in order to have a sliding assembly following the second boom.

I had to add a layer of beams to first and second part of the boom in order to fit rack gear. some things need more reinforcement, but as I wrote, POC - not MOC

Anyhow, I am interested in you opinion about this approach. Not using thread for extending boom, not auto-extend third part and so on. Furthermore, it would be really a challenge to build a boom - and a crane that actually could lift some real weight, it is still way too weak for anything more than, for example 2 8043 buckets

some pics, take it for what it is... (I hope I am following forum rules in regards of sizing and such, please let me know otherwise!)

[Blakbird]

The changes are quite extensive, especially for the outriggers part... As I have done the lxf sub-grouping into fairly details, I might as well start looking into LDD to LDraw conversion, which I did last week :)

The good thing about the conversion is that it gave about 90% relatively correct pieces & locations but the order are just a mess! I need to go through every single part and cross check with the lxf/ models and so far it's still manageable. Here is 25% done stepped file and I have a few questions that need help in order to speed up the stepping process.

Wow, thanks for all the effort! Unfortunately, Dropbox is blocked by my company so I cannot look at your files at work. I will try to look at them later and offer you some advice. In the mean time, please feel free to download my LDraw files and see how I did the submodels and stepping in MLCAD.

http://bricksafe.com/files/blakbird/Renders/MOCs/42009%20Mod/Grove%20GMK6400.mpd

- How can I read the stepping from multipart files? when I export sub-models one by one and did the stepping WITHIN the sub-models, LDview can show it, but once i made a multipart ldr and drag different sub-models into one, the stepping gone in the master file..

LDView shows the top level model by default. To see the sub-models, hit CTRL-M to see the model tree and then choose a submodel. Then you should be able to see the steps.

- When I group (Ctrl+G) several parts, how can I re-open the group and edit?

First you have to ungroup before you can edit. Unfortunately, MLCAD does not remember the group so you have to do it again if you want to restore the group. Personally, I do not like MLCAD groups and prefer to just make a submodel of anything I want to group.

- How can I adjust shock absorber length?

Only manually. Instead of using the "complete assembly", you can build a shock absorber from a body, piston, and spring as a submodel. Change the length in the submodel and then use the assembly in your model.

Attached here also the stepped sub-models ldr for reference. Any recommendation or quick fix are appreciated. I think it might take another 3 weeks in order for me to complete the remaining 75%. finger crossing.

Looking forward to the final file. If you have it completely stepped, I am willing to make a PDF instruction file from it. I'll also extract a new parts list as well as compare it to the old list so that people like me who have already collected the parts can see what else they still need to get.

[torso]

I have never really liked the extension of the third part of the boom, using the thread.

First of all, you don't wanna extend the third, and weakest boom at all times, second, the thread thinking is, at least for me, not really technic..!

Isn't the thread thing how this works in real cranes? To me it's the gears that are wrong, as that ought to use hydraulics instead. To me it's technic if it works, and the thread thing is a beautifully simple solution. Feels like you think technic is about solving everything with gears.

That said, it's wonderful that you're exploring alternative solutions. If you can lift more weight (in some cases) by not extending the third boom, that would be an improvement. I'll be interested in how well you will be able to keep the performance and aesthetics of the original boom.