Sunday, November 27, 2011

Week TechVideo, 2011 #47 - 3 functions through one turntable

It was back in 2003, with the mythic JCB JS220 Excavator from Jennifer Clark, that she shown us how to fully implement the routing of two independently driven axles, through the center of one Technic turntable [1, 2]. It took us another 6 years, till we came to see the same principle applied into the crane of an official LEGO Technic set (8258, Crane Truck), by Uwe.
Since then, some have tried to take it one step further and find one way to route three axle functions through one turntable...

Someone raised the discussion, earlier this year on EBs and then finally a viable solution came up.
Member blueShinyApple managed to convince everyone, on his concept [3] and soon fmmjqtft made a nice animation using MLCad, LDView and Blender to demonstrate it.

Here it is the corresponding LDraw file from fmmjqtft, if you need it.

However, the solution is quite big, complex and should have a considerable friction to be used at a commercial model. Don't think this time we're going to see it at an official LEGO Technic set, anytime soon...


Parda said...

Perfect, I'm close to cry now ;-)

Wiseman_2 said...

Took me quite a while to figure out how it worked, but it is really rather clever. Though I seriously doubt we'll see this one in an official set anytime soon.

Ricardo Oliveira said...

It's a very ingenious solution! Congratulations to blueShinyApple!

However, I find it quite hard to integrate in a model (not even official). When applying movement to the 36t gear, the 5L beam needs to turn, which requires a lot of free space between the 36t engagement and the other 2 functions, making it very tricky to reach all functions.

And if this is true for the base, it will be even harder to design something moving on top, which is usually not very big in diameter.

Related Posts Plugin for WordPress, Blogger...

© 2007-2014 TechnicBRICKs
TechnicBRICKs contents may be sporadically updated, if the authors finds further relevant info about a certain post, or content/spell mistakes. Hence please don't be surprised if you find few changes at later visits, relative to a previous read.

TechnicBRICKs often shows other peoples' creations and/or images. We always try to credit the author(s) and link to their main publishing website, and if possible with their name in real life.
Since this is not always possible, we request that if you find something here that is yours or from someone you know, you leave a comment on the respective post and claim the authorship.

TechnicBRICKs is optimized for Firefox 16.0 and 1600x1200 resolution displays or wider.

LEGO® is a trademark of The LEGO Group of companies which does not sponsor, authorize or endorse this blog.
LEGO, the LEGO logo, the Brick and Knob configurations, the Minifigure and MINDSTORMS, are registered trademarks of The LEGO Group.
Original LEGO images are copyrighted by The LEGO Group and are used here in accordance with their fair play policy.
You can visit the official LEGO® website at