Search the Community

Showing results for tags 'Gbc'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Frontpage, Forum Information and General LEGO Discussion
    • Guest Section - PLEASE READ BEFORE YOU REGISTER!
    • Frontpage News
    • Forum Information and Help
    • General LEGO Discussion
    • The Embassy
  • Themes
    • LEGO Licensed
    • LEGO Star Wars
    • LEGO Historic Themes
    • LEGO Action and Adventure Themes
    • LEGO Pirates
    • LEGO Sci-Fi
    • LEGO Town
    • LEGO Train Tech
    • LEGO Technic and Model Team
    • LEGO Mindstorms and Robotics
    • LEGO Scale Modeling
    • LEGO Action Figures
    • Special LEGO Themes
  • Special Interests
    • Minifig Customisation Workshop
    • LEGO Digital Designer and other digital tools
    • Brick Flicks & Comics
    • LEGO Mafia and Role-Play Games
    • LEGO Media and Gaming
  • Eurobricks Community
    • Hello! My name is...
    • LEGO Events and User Groups
    • Buy, Sell, Trade and Finds
    • Community
    • Culture & Multimedia

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


What is favorite LEGO theme? (we need this info to prevent spam)


Which LEGO set did you recently purchase or build?


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Location


Interests


Country


Special Tags 1


Special Tags 2


Special Tags 3


Special Tags 4


Special Tags 5


Special Tags 6


Country flag

Found 143 results

  1. A new topic to attempt to centralize information, improvements and discussions about the most iconic Great Ball Contraption made by Kawaguchi Akiyuki, The Ball Factory GBC Version 0, July 2008 by Superbird28. Akiyuki stated himself he was inspired by Superbird28 when designing and building the Ball Factory. Why can be clearly seen in this video dating back to the pre-digital age. Thanks @Jonas for noticing. Version 1, June 2011: with color sorter as input: Version 2, november 2011: picker for 2 balls and optimized for higher speeds (1.3 balls/s) Februari 2016, @Blakbird and @TheRebricker reverse engineered the Ball Factory over a period of two years and posted the below: Video instructions by The Rebricker PDF instructions by Blakbird 4428 parts MOC Review by Blakbird LEGO Digital Designer file by @TheMagician The Akiyuki Project topic by Blakbird April 2019: Ball Factory New Style GBC compliant, reliable and easy to move: A big thank you to Blakbird and TheRebricker for all their hard work! This reverse engineered version adds the option to circle balls within the ball factory, here my build from December 2016 Many have build the Ball factory in various colors and versions. Below an overview of suggested and quoted improvements with pictures out of the 77 pages in The Akiyuki Project topic, up to you what changes you want to make. Feel free to add your builds, improvements or questions about The Ball Factory to this topic. ___________________________________________________ Spiral Lift platform improvement by Jonas: used a SNOT technique to get a stronger platform. It allowed me to remove the gap and to fix the superstructure to the studs. Moreover, I used the remaining stud of the 30414 brick to stabilize the tower column by a vertical 1x6 tile. Now, each column is fixed from 3 sides and the tower is really stable. It will survive even an accidental kick.  And, I added another (third) black pin to strengthen the vertical support (shown on page 186 in Blakbird's manual) ___________________________________________________ Ball picker improvement by Jonas: I have also made a small improvement of the ball picker - the part that picks a pair of balls and puts them into a bucket. It happened quite often that the right ball dropped before it reached the bucket. When I analyzed the construction of the picker, I noticed that the rightmost axle is significantly looser than the other ones. While the other two rear axles are attached to the rail construction, this one is not and cannot be attached. In my version, I fastened this axle to the rest of the assembly by replacing a 3L liftarm by an L-shape liftarm (not necessarily in yellow color). -> Since that time I have not observed any earlier drop. ___________________________________________________ Back pivot point by @Ankoku I have used the 5.5L Axel with Stop just like the original. You could probably get away with a 5L, but the connection may be hanging off slightly. The main piston rod has been changed from 20L to 19L in complete length. I used the "Technic, Plate 1 x 5 with Smooth Ends, 4 Studs and Center Axle Hole" which Akiyuki used, just because I did have them kicking around spare. A 6L Plate would be fine. I have gone with a 11L and 7L lift arm. Akiyuki went for a 15L and 3L, thus far, I haven't seen any reason for using those particular lengths. One bonus with using the plate to connect the two lift arms, is that the connection is rock solid, so you no longer have the wobble of the altered version. As you can see on the right, the connect on the end of the 8L axel is flipped. In the ReBricker instruction video, he has it this way round and then adds a later correction to show it the other way around. This way round is the way it is in the Akiyuki video and it is required to make this pivot point work. ___________________________________________________ Bucket shift timing mechanism by Ankoku Here is the piston itself. I have changed it to the original format. This is obviously the left one of the two in the video, as you can tell by the connector end, but other than that, the two pistons are identical. The crucial change is Technic Beam 1x3 Thin between the two year 1x5 Technic Beam Thick. The reverse engineered solution doesn't have that. That provided the extra travel I was looking for. As you can see, the connections for the yellow beam on the right aren't as pretty and you lose the symmetry. That said, the new motion is as smooth as butter, which is immensely pleasing in comparison to trying to make the other method work. ___________________________________________________ Bob improvements by Ankoku The initial changes to the height didn't do much to improve smoothness and I found that the paddle seemed to now be an issue. It was also the source of quite a bit of friction. As you can see in the image, the paddle is 3 deep in total. You can tell this from the light grey 3L axel. The bottom part of the paddle is a Technic Beam 3 x 3 L-Shape Thin. Using that piece makes a lot of sense and seems far better than using 3x Technic Beam 1 x 3 Thin, where the 1st of those completes the light grey 3L axel length and the other two are at 90° to create the L shape. Unsurprisingly, this approach is smoother as there is less friction. ___________________________________________________ Bucket unloader by Ankoku So I was playing with it and it didn't seem to work very well and certainly didn't reflect the motion I was seeing in the Akiyuki video. Having watched the video more times than I care to remember, I noticed that the lift motion seemed to be in a single motion, not two. I also noticed that the lift arm used seemed shorter than the one in the instructions. So in the end, I changed it from a Technic Beam 1 x 5 Thin with Axle Holes on Ends, to a Technic Beam 1 x 4 Thin with Axle Holes on Ends, using yellow ones to reflect those in the video. This seemed to work well and reflect the video. Then I checked on Bricklink and it seems that Technic Beam 1 x 5 Thin with Axle Holes on Ends don't come in Yellow. So yeah, that bit needs to be a 4L not a 5L. ___________________________________________________ Back slider by Ankoku, There is definitely these two beams there, length unknown. Below I am using 2x Technic Brick 1 x 15. You can see both in the Akiyuki video, although only 1 at any one time. This also explains why the bottom Technic Axle and Pin Connector Perpendicular is attached differently to the two above it. For the forward back motion you see in the video, this is not possible with the use of a pin instead of an axle. The axle you can see here, allows full motion in one direction, but slightly limited in the other, which is exactly what you see in the video. It is only possible to put the top Technic Brick 1 x 15 in there if you remove the plates from the bottom of the slider. If you look in the Akiyuki video, those plates are not there. I still don't know how either piston connects to the slider exactly. I am still hoping to hear back on that. That said, these two beams seem to be correct and answers a few questions. ___________________________________________________ Bucket slide by Ankoku The area that the buckets slide along for the shifter is actually offset by half a stud in the Akiyuki version. This is not reflected in the instructions. This answers why the shifter itself is half a stud over the sliding area at maximum backwards reach. I always thought the shifter didn't do full travel, but it does, it is just the sliding area which is misplaced. Here you can see how the sliding shelf is connected to the conveyor with a Technic Brick 1 x 2 [2 Holes]  Anyway, changed the length of the slider my one, so that is now correct. Removed the plate from the bucket stopper just before the slider, so that is now working correctly and is the same as the video. Bob now actually aligns correctly with the buckets at maximum reach. ___________________________________________________ Shifter changes by Ankoku This removes the need for any universal joints and thus removes the variable speed of the conveyor. ___________________________________________________ Shifter changes by Ankoku It seems Akiyuki has reworked the pivot mechanism and beam length. This new approach removes any potential bend in what would have been an 8L axle. The new approach requires a shorter piston beam, a longer beam under the shifter. The brace is 2x Technic Beam 1 x 6 Thin. Here, you can see the positioning of the pivot point, the indentation in the conveyor tower, which is 2 bricks deep to allow the pivot arm to travel that far. You can also see the black axle instead of the grey one, as it requires that extra 1L for the back and forth arm to pivot one. At the top, you can see where the slider platform connects and how it is moved 0.5L across. Shifter Changes in action: ___________________________________________________ Ball dumper by Ankoku It sits at the right height, the ball router works well and the axle housing is aligned correctly. As you can see above and below, I have added blockers to either side, which means that a renegade ball can't escape up hill. Balls can only pass when the router is in the correct position for that route. Inside is only 2 wide now and doesn't have any pins etc. ___________________________________________________ Ball unloader by @smdzucladoc After seeing Ankoku's mods as well as his detail photos of the bucket shifter, My ball factory has been much improved. I was still having a lot of friction in the ball loader until I add these mods. Now the ball loaders is very smooth. I add a 1x3 liftarm in between the two Axle and Pin Connector Perpendicular Triple and it seems that the loader doesn't bind to the axles anymore and it is very smooth. I also added some additional bracing to the back of the ball loader. I added two additional Technic, Brick 1 x 2 with Hole and a 1/2 bush to the bottom axle. I also change the axle 3L to 4L and added 2 Axle and Pin Connector Angled #1 and then a 6L axle perpendicular to try to brace the 12T and 40T gear as perpendicular as possible. ___________________________________________________ For inspiration, this extended version by @Jonas and black version by @Thunderthumbs
  2. Great Ball Contraption (GBC) - General Discussion and Index This is a topic used for GBC general conversation, questions, hints, tips, etc. This first post will be used to maintain an Index of GBCs here on Eurobricks or other websites. Eurobricks topics LEGO GBC 8 + Building Instructions (5 modules - 2 motors) New Akiyuki GBC Instruction Index Other sources Greatballcontraption.com
  3. G%$ #@&% it. Thanks to Akiyuki, The Rebricker, and the rest of you &%$*ers, I've now caught the GBC bug and it is going to cost me a lot of time and money. It all started with Akiyuki. Well, GBC didn't start with Akiyuki, but I was more or less "meh" on the whole concept until he came along. His ingenious mechanical solutions are mesmerizing, perplexing, and wonderful. Although I admired them from the start, I figured there was more or less no chance of me replicating them from the videos, especially since the one I was most interested in was also the most complicated: the ball factory. My involvement therefore remained stagnant (and non-existent) for a couple of years until The ReBricker showed up and proved that you really could reverse engineer the Ball Factory and then went one step further and posted video instructions for the whole thing. "Fine", I thought, "I'll just build that one." A few months of LDraw modeling, part collecting, building, testing, and display case building later I was hooked. It was one of the greatest building experiences I've ever had. This forum has repeatedly wished for a comprehensive set of instructions for the GBC modules of Akiyuki, and I've decided it is my responsibility to help make your dreams come true. With that in mind, I've compiled a list of all of Akiyuki's 28 non-Mindstorms modules with the goal of creating and/or finding complete PDF instructions for as many of them as possible and compiling the resources here. I've made a lot of progress already. Here is the list along with whatever I know about building material available. (currently 30 of 30 complete) Pinball PDF instructions available from Blakbird and Courbet 992 parts Presentation Topic Zigzag Stairs PDF instructions available from Courbet 481 parts Presentation Topic Cup to Cup - Type 1 v1 PDF instructions available from djm v2 PDF instructions available from Blakbird 1089 parts Presentation Topic Cup to Cup - Type 2 PDF instructions available from Courbet 1222 Parts Presentation topic Elevator Module PDF instructions available from Blakbird and Courbet 1621 parts Presentation Topic Marble Run PDF instructions available from Blakbird and legolijtje 1140 parts Presentation Topic Catch and Release PDF instructions available from Blakbird and jesuskyr 711 parts Presentation topic Ball Factory Video instructions available from The Rebricker PDF instructions available from Blakbird 4428 parts Detailed review by Blakbird Spiral Lift Short Version 876 parts PDF instructions available from Blakbird Presentation Topic Tall Version 1455 parts PDF instructions available from Blakbird and 9V System Presentation Topic Pneumatic Module PDF instructions available from Blakbird and jesuskyr 543 parts Presentation Topic Archimedes Screw - Type 1 PDF instructions available from Blakbird and Courbet 995 parts Presentation Topic Archimedes Screw - Type 2 PDF instructions available from Blakbird and Courbet 739 parts Presentation Topic Archimedes Screw - Type 3 PDF instructions available from Blakbird and Courbet 768 parts Presentation Topic Zig-Zag Lift PDF instructions available from Blakbird and jesuskyr 800 parts Presentation Topic Basket Shooter PDF instructions available from Blakbird and djm 2226 Parts Presentation Topic Train Module - Type 1 PDF instructions available from Blakbird and Courbet Motor (157 parts) Switch (167 parts) Unloader (324 parts) Siding (106 parts) Loader (603 parts) Crane (3046 parts) Complete Set (4569 parts) Presentation Topic Train Module - Type 2 PDF instructions available from Courbet Motor (160 parts) Unloader (751 parts) Siding (178 parts) Loader (835 parts) Presentation Topic Wheel and Steps PDF instructions available from Blakbird and Courbet 1198 parts Presentation Topic Step Module PDF instructions available from Blakbird and jesuskyr 1785 parts Presentation Topic Fork PDF instructions available from Blakbird 878 parts Presentation Topic Six Heads PDF instructions available from Blakbird 1696 parts Presentation Topic Bucket Wheel Tower PDF instructions available from Blakbird 1415 parts Presentation topic Lifter Triggered by a Stuck Ball Video instructions available from The Rebricker PDF instructions available from Blakbird 1068 parts Presentation topic Spiral Staircase PDF instructions available from Blakbird and jesuskyr 1923 parts Presentation topic Tilted Rotors PDF instructions available from Blakbird 1223 parts Presentation topic Invisible Lift Video instructions available from The Rebricker PDF instructions available from Blakbird 3203 parts Presentation topic Cycloidal Drive PDF instructions available from Blakbird and jesuskyr 2081 parts Presentation topic Fork to Fork PDF instructions available from Blakbird and jesuskyr 1743 parts Presentation topic Planets PDF instructions available from Blakbird and Courbet 1558 Parts Presentation topic Strain Wave Gearing PDF instructions available from Blakbird and Courbet 2789 Parts Presentation topic Here's a montage of some of the LDraw work I've done so far which also gives you an idea of the relative scale of the modules: I'm not going to post any actual instruction files until I (or someone else) has tested them by physically building the model and proving that it works. I'm a stickler for accuracy, so I'm trying to get as close to Akiyuki's originals as possible. I already have PDF instructions ready for 4 of them and just need to test them out. As I build each model, I'll post a mini review about what I've learned and then I'll post links to the instructions and parts lists so anyone else can build them too. (Update: See bulleted list above for which instruction files are currently available.) As always, help is welcome. If you have successfully built any of these modules and are willing to share your information, please let me know here. In particular, I need LDraw files to make instructions. In a pinch, I can make them myself if you have detailed photos. In an even tighter pinch, I'm making everything myself from the videos, but it is slow going. Enjoy!
  4. Update from 2019 I have made a new and stable version of the GBC module for which there are building instructions: The new module has a latch and lifting counterweight mechanism to make the tipper function reliable. The building instructions can be found here: https://brickhub.org/i/425 The tipper fills up: The counter weight lifts until the latch comes undone and the tipper tips: And empties: Closeup of the latch mechanism, which doubles as a stop mechanism for balls, so they do not fall onto the tipping tipper: The module can be placed in self-feeding mode, just like the old module from 2008: And circuit mode: In the back side there are skirts to catch potential escapees: Rendering of the model from the building instructions: See the brickshelf folder for "action shots" where series of pictures are taken in succession to show the functions: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=315097 The initial content below this line ------------------------------------------------------------------------------------------------------------------------------- It has been a long time since I have presented a new MOC in here. I have been busy preparing for Klodsfest 2008 in Taastrup. Here is my contribution to the GBC-layout. (Those space ships are made by Sir Bugge from Classic Space forum - the red Z-fighter is new and contains some superb building- and SNOT techniques. The white tower is also a GBC module and the builder brought enough extra modules to complete a circuit) The big ring lifts the balls up and it's random whether they fall through the first or last hole. The first leads directly to the glass tower while the last guides the balls into the deer scarer (Shishi odoshi in Japanese). I don't have a video camera, but I was able to make this little movie using my regular camera: http://www.youtube.com/watch?v=CQ00fXpgQOs The module has a self-feeding mechanism so it can work alone and is remarkably reliable. Anyone who has seen my previous modules would be surprised. If the wheel gets blocked, the big PF motor will try to budge it free. It drops a ball now and then - that is my trademark
  5. I've designed the below GBC called Rainbow Wave. It has 38 Lego colors and about 1150 moving parts. It is powered by a single motor, with each of the colored pistons sitting on an 8-tooth gear. Each piston’s gear is exactly 1 tooth offset from its neighbors making one wave 8 colors. The GBC is level so the balls are moved by the waving surface. Free building instruction for version 2 and parts list is available on Rebrickable with a thank you @Courbet for the improvements and creating the digital model! https://rebrickable.com/mocs/MOC-7456/Berthil/rainbow-wave-gbc-v2/
  6. After my experiences at the full week of Lego World Utrecht I decided to do a complete redesign and rebuild of my stand alone GBC version of the Akiyuki based marble run. Only the method of clamping the tubes as tracks is the same as in the previous version. The ball shooter had proven it's reliability during Lego World and because of the improved design only one shooter is used. Very pleased with the now reliable result. https://www.youtube.com/watch?v=olx4JmtnVq4
  7. Technic Master

    Hello Everyone!

    Hi All! Long time lurker first time poster! Happy to have joined the community! Im an avid lego fan (albeit a bit of a lego hoarder) and I have been collecting lego since the 90s. I really enjoy working with the technic theme theme, creating random machines and creating GBCs, however working with classic bricks also works for me. I have approximately 100k pieces available at disposal (mostly sourced from bricklink), which is probably not as much as what you guys have :) I’ve also recently started a youtube channel to share some of my creations, please have a look and subscribe! Technic Master’s Youtube Channel Looking forward to sharing more of my custom creations. Louie
  8. I took sawyer's Spiral Lift to a higher level xD Sawyer's thread 7 levels and Akiyuki style and input.
  9. This is my take on Tom Atkinsons‘s „Perpetual Prototype“ module in classic GBC style. Often seen in Beyond the Brick GBC videos,
  10. After my Rainbow Wave it was time for something different. Inspired by the Paternoster in the Wall-E movie I wanted to create something like that as a LEGO GBC. I kept the in box as low as possible for reasons I will reveal later. As a result of that the ball pickup after the ball release from the buckets is just 1 brick high. Hope you like it:
  11. This Lego GBC Module uses a Scissor Lift mechanism to lift the balls up. The mechanism is quite reliable and sturdy, I never had problems with the balls falling out. The gear train is long but it does not have much friction because the stepper does not use much power. I would like to make one with more lift mechanisms similar to Akiyuki's six heads module but I don't enough of the cup pieces. The LDD file is here. More photos here.
  12. Well, I was amazed by this GBC, when I first saw it last year, and decided to try to reverse engineer it. Thanks to a few good pictures from the creator: ykuramata05, I started work on it... That was over 6 months ago.. and I got stumped on a few bits.. so it got put aside Finally had a clear workbench the other week, so decided to get back to it, and managed to finish it off.. funnily enough - 2 other builders - @alanburchill and @Courbet had decided to tackle it at the same time! I will say it is 95% true to the original creation.. I only needed to change a few minor things - I added a Clutch gear in, just before the pot-stirrer, as I had a couple of times where balls jammed in there I also believe that I don't have something right, as the 'shutter' rising up and down the picker column, hits the output chute from the ball input.. it touches it slightly.. but so far, doesn't seem to affect the machine too much it seems to be quite reliable too - 1 ball dropped every few hundred, maybe? and sometimes, it doesn't pick up a ball.. but the next arm around will get it, and any build-up of balls will be cleared very quickly the input bin doesn't seem to like a full dump of 30 balls.. but is fine with 10-20 in there I also took this opportunity to have a good play with Bricklink's Stud.io editor.. and have enjoyed using it.. Therefore, there is now a digital file of this GBC: Stud.io Format: http://bricksafe.com/files/rbeckett/gbc-stuff/eggprocessgbc/GBC Egg Process Machine.io LDraw: (export from Stud.io - hope it's OK!) http://bricksafe.com/files/rbeckett/gbc-stuff/eggprocessgbc/GBC Egg Process Machine.ldr @Courbet has generously offered to create instructions for this - so hopefully he will add to this thread, when done! :) Stud.io reports that this model uses 635 bricks, and apparently will cost $75USD to build! I should probably buy a few Angry Birds Lego sets to decorate it!!! :D
  13. welcome to the mindstorm section of the Akiyuki project, this topic is for the modules of Akiyuki that have mindstorms in them or use mindstorms in any way. I will work with Blakbird to get instructions for these modules done, as always I would appreciate any information (pictures/videos) of these modules working or built here's what I know so far: Ball Cleaner EV3( in progress by 9v system) program by Akiyuki (instructions not yet available) Container Transporter NXT (instructions not yet available) (no program available) Fast Ball Sorter EV3 instructions by Courbet, built by Courbet and Mogwai, program also by Courbet and Mogwai, Render by Blakbird(instructions available) building instructions, program for the ev3 any help would be good to get these modules made into instructions (programs will also need to be made) 9v system
  14. GBC 25 Sweeper This is a slightly different review than normal. This is not a set review; it's an instructions review. PV Productions publishes a line of GBC instructions, made from existing Lego sets. This makes it very simple for new GBC builders, since you don't have to hunt down an array of parts via Bricklink. If you have one of the Technic sets, you have everything you need. Name: GBC 25 Sweeper Set Number: uses parts from 42049, Technic Mine Loader (originally retailed for $50; currently used sets are available for $30-40 on Bricklink) Pieces: n/a Price: €9.95 for the instructions Minifigs: 0 Theme: Technic, GBC I (and my sons) love watching GBC setups. The mechanisms used are fantastic and just fun to watch. I've seen the massive discussion threads in the Technic forum here recreating Akiyuki and other GBC designs. One drawback is the need to assemble an array of pieces, and there's often the need for rare pieces (like the chrome silver reflector dish that's beloved in GBC setups and so sells for multiple dollars EACH). PV Productions publishes a line of GBC instructions, where each design is a "C model" of an existing Technic set. As long as you have that set, you have all the pieces you need to build the GBC (except for the balls, which PV Productions also sells compatible, non-Lego balls). I bought a couple instruction sets to convert Technic sets I own into GBC modules. I did not buy the PV Productions balls - I didn't want to pay international shipping. After some googling for alternatives, I saw recommendations for 9/16" Delrin bearings. I ordered a bag of 100 of them on Amazon for $11.25 shipped. The Instructions PV Productions provides their instructions as downloadable PDF files. They are designed to be printable, but that would be costly, since they have the solid light blue backgrounds like many Lego sets do. Instead, you can easily use a computer or tablet to view it electronically. The files are password protected and have your account information (email, purchase date) across the bottom of each page to prevent piracy. Given that, I don't know why they restrict you to 3 downloads of each file. It seems like an unnecessary complication to the process and would cause extra customer support issues to arise. The instructions are reasonably easy to follow. The image quality is slightly less than Lego and occasionally the steps are difficult. It's obvious that they're generated by computer rather than hand-curated. Some steps aren't turned the best way to view the connections being made, and some steps would be easier to do in a different order. None are TOO difficult, so it's not too much of an issue. It is definitely a significant step up in difficulty though - not for small kids or someone who hasn't done much Technic building. Personally, I liked it. I'm a fan of the older instructions that added more pieces at once and were more complex. The current instruction style feels over-simplified to me. The GBC This GBC is designed to look like a trailer. There are wheels and a tow point at the front. However, it's not really usable as a trailer. The wheels are attached to pins, not axles, so they don't roll easily. That could be modified if you wanted; there's axles left over. And when you are operating it, there's a tool to lock the wheel in place (it's the assembly with the dark grey axle connector just above and to the right of the tire in this photo. The light grey axle goes through the pinhole in the wheel and into the frame of the GBC to keep it from rolling) There's also a few spots that feel like part usage just to use up pieces - such as the "light" made of a stack of clear studs on the upper edge. PV Productions also followed the Technic standard of including a piston engine in the set. In this case it's a tiny single cylinder design, but it works. It is pretty fragile and fiddly during the build process though. At the front, there is this axle with a pair of light grey 3L perpendicular connectors on it. It can rotate, flipping the connectors up. The only purpose I see is that adjusts the angle of the GBC by the tiniest of amounts. The feed tray for the balls is connected by this single point. That does make it wobble around, but that also is part of how it works. I have a feeling that if it was more rigidly attached, you'd have more ball feeding issues. The right-side tire is held out from the machine by this red bush. That is because it'd rub on he yellow liftarm if it wasn't out so far. That does make it feel a little unstable though. Since you can't really roll the unit around anyway, I removed that red bush on my setup to make it a bit more compact and stable. The Video This GBC runs very smoothly most of the time. If you don't put enough balls in, it does sometimes mis-feed and the ball not drop under the "antenna" piece. With 5 or so balls, it runs great. The manual does walk you though how to get the timing right of the lifting mechanism, but I found that if you just position them as shown in each step of assembly, it comes out working right. If you weren't paying that much attention to detail, you just need to remove the black gears, rotate each tan gear correctly, and put the black gears back on. The video also demonstrates the other party trick of the set. If you rotate the exhaust piece at the top of the path, the balls fall straight ahead, making it able to feed into a different GBC instead of returning them. The Conclusion This is a great introductory GBC set. It's easy to get the parts for, since it's all from one set. It runs well, and is a nice level of challenge to assemble. I think it makes a nice display on its own, but there's also room to modify it if you want. You could make it longer, improve the return ramp, etc, and that's part of the fun of GBC. The price seems reasonable on it's own, but when I look at the other, much larger, GBC designs that they sell, in comparison it feels a touch overpriced. This small set was ten euros, but instructions for much larger models are 13 to 25 euros. Given how much work must go into designing and then digitally modeling each set, none of it seems unreasonable. Now time for me to go work on the GBC 14 Strandbeest, built from the 42054 Tractor set...
  15. This lego GBC module use 3 brick separators to lift the balls up. I came up with the idea to use them like this after looking at a pile of them that I have and thinking that having more than 2 of them is kind of pointless. The module is quite reliable and in in theory could be made much higher easily. The loading mechanism is designed so that the ball can role back into the module if it does not role onto the brick separator properly, this happens sometimes when the batteries run low. (you can see at 0:46 in the video) The LDD file is here. More photos here.
  16. Great Ball Pit

    [GBC] Separation Anxiety

    Hey everyone, here is a sideways conveyor I've made using 25 brick separators. It is quite a simple build, and has some input restrictions. It can handle a fast stream of 1-2 balls but would fail the 30 batch standard rule. I think it looks great even when turned off. Some people have said it looks like an insect, and I think it has that nice baggage carousel effect when it's turned on. Please enjoy the video.
  17. Hello, I present you my "washing machine" Two drums turn in opposite directions, inside each of them there are guides to advance the balls. In the 2nd there are small skips that go up the balls until the exit. The two drums rotate on tires then allows sufficient grip and allow stalls in case of jamming ball. This also makes it possible, compared to the sprockets, not to synchronize the rotation of the two rows of tires. The frame is rigid to hold the two drums in place. Here are the pictures: IMG_20190113_192558 by alex peraux, sur Flickr IMG_20190113_193734 by alex peraux, sur Flickr IMG_20190113_193728 by alex peraux, sur Flickr The frame: IMG_20190113_193700 by alex peraux, sur Flickr IMG_20190113_193710 by alex peraux, sur Flickr the 1st drum: IMG_20190113_193645 by alex peraux, sur Flickr 2nd: IMG_20190113_193653 by alex peraux, sur Flickr and the vidéo: VID_20190113_192920 by alex peraux, sur Flickr comment are welcome :)
  18. Great Ball Pit

    [GBC] Solaire

    Hey everyone, Here is a very simple, yet elegant GBC module using the old Skateboard Ramps, and the newer large ring gears. It clears balls very quickly, and is rock solid reliable.
  19. Version 2 of my cup to cup GBC but actually third rebuild. I thought it already had a separate topic but apparently not, hope you don't mind I create this one. After running it at several events, where it was one of the favorites of the public, I updated the drive system to a more direct drive and better force distribution by driving the crank through a 36 teeth gear instead of directly on a single axle. Also added more steppers for better ball entry and exit with basket. Direct drive from the XL motor. According to the gear calculator from Sariel this setup has 46Nm compared to 16Nm for the previous one! This makes the whole GBC run smoother and more reliable resulting in no dropped balls during the half hour I tested. The turntables are mounted with neck braces in the frame to get the correct gear distance. For reference, version 1 video here
  20. This lego great ball contraption miniloop uses a ball pump style mechanism to lift the balls up, when they reach the top they fall out of the "lighthouse" down onto the rocks and back to the start again. The mechanism is quite reliable and can be made as tall as you want, if it is built higher it might need extra weights to make up for the weight of the balls though. (I am considering using it for the start of my next module). LDD file.
  21. This lego great ball contraption module uses technic "banana" gear to lift the balls up. It does put a bit of stress on the parts but it doesn't leave any damage. They are at a bit more of a angle than Maico Arts original version wich was 1.5 studs apart, this way it can be higher and run smoother. The stepper mechanism uses two lift arms on each step, this helps it run smoother and with less force on the motor. The LDD file is here.
  22. This lego great ball contraption uses a shooter mechanism to shoot the marbles into a castle. The range of the shooter mechanism can be easily adjusted with a gear at the back, it uses a large linear actuator attached to a shock absorber to do so. Part of the back of the castle is made from lego 6L half beams to slow the balls down. I have the LDD file for this module here. Do you like this kind of decorated module or do you think it is better to just focus on the functions? I like this kind but it uses a lot more pieces and takes a lot longer to build.
  23. Update 2 New, more reliable, version of the module is up. The GBC layout now contains 20 modules. See my latest message below. Update The module has been updated with an anti-jamming mechanism. See the updated building instructions on http://c-mt.dk and Rebrickable (http://rebrickable.com/mocs/MOC-8843/LasseD/gcb-conveyor-starter-module/). See my latest post for the process of testing and improving the module. It is about time I did my part for getting new members on board the Great Ball Contraption (GBC) train. Here is my starter module. It is a simple conveyor module with 194 parts where none of the parts should be hard to come by. Here are the building instructions: http://c-mt.dk/instructions/models_gbc-GBCStarterConveyerBelt.htm In the video I also show how the module works in a circuit. This module should be easy to multiply where a single motor powers multiple modules. I will try to do that next.
  24. I'm back with another module and video. This time I've created a small, simple conveyor belt that is proving to be quite reliable. As well I've shown how you can modify it to make it your own creation. Instructions for this module are available on my website. Here is another version I've made. I'll be posting the video for this one next week. Here is the video for the Jade Dragon variant.
  25. Great Ball Pit

    [GBC] Upslide

    I forgot to post this last week, here's my latest module Upslide. It uses a helical pusher to push balls up a friends slide, and it's powered by a PF M Motor. I tried to run it at BrickCan this weekend, but it only performed for a few hours before having a bunch of issues I'll need to fix. I need to reinforce the input bin walls, tweak the output at the top of the slide, and fix a small gearing issue for the helical drive. Stay tuned for a version 2.