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Found 190 results

  1. 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
  2. GBC Module Ball Factory My idea is to build a ball factory. The balls are placed in baskets in pairs, transported a little further by a conveyor belt, and then emptied again. For the baskets, of course, I will also have to build a return track. It's inspired by the Ball Factory from Akiyuki, but I made and will made some major changes, such as using only technic parts, the bigger conveyer and other mechanisms. Here a close-up from the left part: Due to the rotation of the light grey lliftarms and the yellow axles, the baskets will move one position approximately every 1 to 2 seconds. Therefore, the feeding mechanism will also be placed at this point. The feeding mechanism will also be a conveyer belt. After the conveyer belt for baskets follows the emtying mechanism of the baskets: The mechanism will empty the basket to the right due the rotation of the dark bluish gray axle at the right side, the rotation of the yellow axle connector at the left side makes the whole platform tilt forward so that the basket slides away and makes room for the next one. Next thing to do will be the feeding mechanism (a conveyer belt).
  3. Inspired by the recently posted video and build instructions here on Eurobricks for Akiyuki's Ball Factory, I have reverse engineered Akiyuki's Cup-to-Cup GBC. It has been built with parts which I had available at the time, so it is a mixture of colours at the moment; The next steps are 1) model it using MLCAD to produce an appropriate LDraw file 2) use BrickLink to obtain the appropriate parts (to reduce the colour mixture) 3) create build instructions using LPub and test them using the parts bought in step 2 4) make the build instructions available for others It will likely be a few weeks before I get to step 4 but once I get there, I will post appropriate links in this topic. Regards, David
  4. Update: Information regarding modules from 2018 onwards are represented after @Blakbird's original post. I want to keep BlakBird's section of the post as he left it, to honour the immense amount of work he put into it. ( @Ankoku @9v system) ----------------------------------------------------------------------------- Original Post Start ----------------------------------------------------------------------------- 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 31 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 31 of 31 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 V1 PDF instructions available from Blakbird and djm V2 file from 9v system 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 V1PDF instructions available from Blakbird and jesuskyr V2PDF instructions available from Ankoku and 9v system 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 Zig Zag stairs V1 PDF instructions available from 9v system 469 parts 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! Akiyuki GBC modules with instructions available to buy from the man himself ( In 2018, Akiyuki started to create instructions for some of his modules. Some for free, some require payment. For anyone who has tried to reverse engineer one of his modules, the price he charges is more than worth it. ) Hockey Stick Lift (2018) Catch and Spin Robots (2019) Heart Chain (2019) Peanut (2019) Akiyuki GBC modules with free instructions Cars with adaptive cruise control (2019) Spiral Lift GBC module compact type (2020) instructions by @FernandoQ New modules which currently don't have instructions available there are currently no new Akiyuki modules that need instructions Modules that were inspired or modified from this project Modules by @FernandoQ Serpentine PDF Instructions 1356 parts Pasillos/ Tilting ladder PDF Instructions 1140 Parts Modules by @Berthil Turntable cup to cup Instructions and parts list available from rebrickable V3 Ball factory Instructions and parts list by @Berthil Related threads Train System @Doug72 has created a dedicated thread for the Train System here: It contains many improvements, mods, additions etc. which anyone interested in the train system should check out! EV3 @9v system has created a dedicated thread for Akiyuki's EV3 modules: A thread dedicated to modules like the Ball Cleaner, Container Transporter and Fast Ball Sorter Robot.
  5. Philtech's GBC Modules Here I would like to present you my GBC Modules. First of all I want to show you my GBC Module - Slider. GBC Module - Slider (see below) GBC Module - Lifting Rim GBC Module - Slider It has a slider that pushes the balls up an inclined plane. Here a few images: Here you can see the mechanism: The io-file can be found here: This MoC at Rebrickable: Thank you for reading and I hope you like it!
  6. 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 brackets in the frame to get the correct gear distance. For reference, version 1 video here
  7. further development of my endless ball track to a gbc loop
  8. 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: 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: 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: 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
  9. 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!
  10. Hi everyone! I have a big question. from the 7th of may to the 15th of may (26th of february to the 6th of march was the old date) we will do our next "phaenoBRICKS" exhibition. We, means the "Steineland Harz + Heide" RLUG which is a part of the "Stein Hanse", a big LUG in the Northern Germany. The phaeno ( is a very famous science-museum and we are glad und proud to have the possibility to do our LEGO(R)-exhibition in it again. The last one was in the year 2020, one week before the great pandemic had forced us to stop holding exhibitions. It was a great success, over 13K people visited the phaenoBRICKs on it´s playtime. Now I started planing for 2022 and here is the reason I came to you. The phaeno is a museum to do experiments, learn physics, mechanics, chemistry .. and many more. The perfect area to present a nice GBC-project. The last time we only had a small circle with only about 20 GBC-elements. This time I hope to make it larger und bigger. It fits perfect to the phaneo, how you can imagine. I hope .. no it will be great, if it were possible to find and build a community here in this forum that would have the time and desire to carry out this project together with us. I am sure, the phaeno will support you and us, with paying the hotel and getting here for example. The details we can clear up personally later. At first I would be happy to hear from you, we all are very dear and nice AFOLs with familiar atmosphere. We always try to accomodate international guests, last year from France and Austria, next year from Denmark and France again. It would be nice to create a recurring GBC-attraction at the phaenoBRICKS. Greetings from Wolfsburg! llap Olli picture from:æno Von Richard Bartz - Eigenes Werk, CC BY-SA 3.0,
  11. My GBC Loops Here I would like to present you my GBC Loops. Technic GBC Small Technic GBC Mini GBC Loop First of all I want to show you my Technic GBC Loop. Other loops will come later. Technic GBC Loop It has three different ways to transport the balls forward: an arm that lifts the balls, with a separator in front of it (like in my small GBC (I will present it here soon)): a conveyor belt: and three small rotating arms: This MOC is already for a while on Rebrickable. Here is a video: More photos, instructions, parts list, and some 3D files are available here. Thank you for reading! I hope you like it.
  12. Hello guys, In this topic i want to show you the miniature gbc modules. Many of you might know the gbc miniloops built by various people. but these are just a single module in an infinite loop. What about mini gbc's with modules that follow their own standart? I have created one: as you can see all of my modules have shared power inputted into the bottom middle. the desicion to put the connector here was mainly influenced by the fact that you can easily make a crank for a stepper module by using common parts. here is the first batch of modules: first of all the simple and classic ball bin size stepper: next up is a simple stepper module: and finally a sweeper module: here is a scale comparison: to the left is my mini gbc ball bin and to the right is a "regular" ball bin. hope you like my models!
  13. The Sun is a GBC module created by @PG52 The video of it in action is here: With his help, regarding additional images, I have created some PDF Instructions for it. The PDF file and Parts lists can be found here: If you want to link to the instructions etc., please just link to that page, as it contains mods, additional images, credits etc. The parts list isn't included in the PDF as Stud.IO isn't very flexible with that sort of thing. The digital file is not currently available. Known issues: I can jam and doesn't have a clutch system to deal with that. It is also a self feeding module. @dunes is currently working on a GBC circuit friendly version. In the instructions, there is a mod to replace the curve at the bottom of the top ramp. This is to remove the twist the flexible hoses cause which pushes the top ramp into the wheel. Notes: For the most part I have used commonly available pieces in regards to certain axle/pin colours. Where this isn't the case, it was done for specific aesthetic reasons and you can of course use the more commonly available colours. I think I mainly just did this for "The Sun" sign. Thanks to: @PG52 for creating the module in the first place and for the additional images. @Doug72 for helping to test the instructions. Additional: I have also added a mod for the Cardan Lift and will be doing instructions for Akiyuki's Cup-to-Cup v1.1, which is the version he is currently running, rather than the one which got reverse engineered close to the time he created the module. These are and will be available here: Enjoy.
  14. Here is my Detachable Cable Car / Chairlift / Gondola / Funicular - GBC (great ball contraption) based on Pierre Georges's brilliant design.
  15. 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 And Steampunk version by @OneMoreRobot
  16. This great ball contraption uses a series of gears and pins to grab the balls and lift them. The mechanism is quite reliable, especially for a module that I designed. Would like to have made it run a bit faster as it does not quite run at 1bps, but it should be able to run at that speed if it is run on 9v. (it was only running at 7.2v in the video as the batteries are rechargeable) Photos on Flickr.
  17. 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. 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 @Juroen) program by Akiyuki ( file available instructions coming soon) Container Transporter NXT instructions available here by @Courbet program by @9v system available here 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
  18. Hello everybody, In this topic I'll put the different things I have in progress, (if any of them becomes consistent I'll open its own topic), and this way I won't put unfinished things in the general gbc thread. At the moment I'm experimenting with GBC, with the parts I have (mostly technic). As a sample, a test of Akiyuki's fork to fork mechanism, The truth is that I'm surprised that it manages to move balls. The conclusion for the moment : - recording with the mobile phone, turning the crank at the same time and catching the falling balls is difficult. -I need to register on youtube or instagram or something where I can post videos and not abuse gif files. I will continue with the trial and error to see what comes out. Regards
  19. Built another module using a new mechanism, it has two arms that extend half way through the motion to pick up the ball before lifting it to the next module. It is quite reliable and runs better at slightly higher speeds. Would be cool to have two forks on each side, kind of like a "cup to cup" module, however I did not want to do it as it would be much less reliable. Instructions on Rebrickable. Flicker.
  20. Hi eurobrickers! My name is Vinc, I also use 20100 as nickname, I'm 34 IT ingeneer in health care and live in France. As many 30s AFOL, I played Lego when I was young with system (city now), space and technic sets. I remember two sets of my childhood, ModelTeam #5541 blue ferry and the Technic Front Loader #8459 which was incredible with its air tank pneumatic system ! A long dark age and then passion si growing since 6 years. I'm found of building architecture in the early 1920s, so I have several modular but I don't spend time to MOC in this theme. I mainly build technic and GBC. Before the "covid age", I use to join friends on french exibitions where we have plenty of RC handling equipement or vehicle to carrier fake rocks. Here is a list of my main MOCs (all are full rc with SBrick or Control+): - Compact Forklift - Front loader - Telehandler - Tipper Grab Truck - 2 Hooklift Trucks - Tipper trailer with previous hooklift trucks I often challenge myself in these creations with combined mecanism, as an example with a 4 channels hub I find a way to have 6 to 9 functions On the GBC side my main creation is a writing text GBC (EV3 WRIT3R can be found on Youtube) where I use my IT skills to succeed. Happy to see you in EB topics !
  21. Have you seen or made a cool gbc model? Have you modded an existing one? Feel free to share here.
  22. Good day, I hope that this is not an inappropriate topic for this form. I have been asked to create an introductory course on how to use Legos and technic pieces to build great ball contraptions. I have learned through the school of hard knocks and how to do it. But I was wondering if anyone in this group can help me develop a syllabus or outline on topics to include in a brief course that would assist students and adult fans of Lego get a better comprehension of how to build one. Any thoughts or suggestions would be greatly appreciated? Or if you know of any good resources that I could use as a framework for a program if you could share it with me or provide me the URLs or documents that would also be very helpful and quite appreciated. If you want to send me something my email is - Thanks - Daniel
  23. Hi Everyone. I'd like to show you my GBC Module that I made called "To and Fro". Definition: to and fro /ˌto͞o ən ˈfrəo͝o/ adverb - in a constant movement backward and forward or from side to side. verb - move constantly backward and forward. noun - constant movement backward and forward. I wanted to design a GBC module that I hadn't seen done before. The main feature of this design uses a string and pulley system, with different levels of mechanical advantage implemented to get the timing of the mechanisms just right. This GBC module adheres to Type 1 of the GBC Standards, processing one ball per second on average ( The main focus of this module is the 'ladder' in the middle which raises and lowers using string and pulleys. You can see this in the video between 1:48 and 2:04, and I'll try to describe what is happening. First of all, the end of the string is attached to the frame, and goes down to the cranks. The exact length of the string can be adjusted, similar to how guitar strings are tightened. The cranks have pulleys on them, so the string actually moves twice as far as the diameter of the cranks as they rotate, but at the same time the force is halved. Next, the string goes up to a pulley fixed on the frame, then down and around another pulley, and back up again. The bottom pulley is attached to the moving part of the 'ladder'. This halves the distance that the 'ladder' moves compared to the string, but also decreases the force required to do so. The string goes over another static pulley at the top, and then back down to the outside edge of the moving part of the 'ladder'. To move the outside edge of the 'ladder' requires the full force of the string to move. Due to the mechanical advantage of the different parts of the pulley system, the 'ladder' wants to move up first since this takes less force, but once it hits a stop at it's upper limit, the string then provides force to the outside edge of the 'ladder' which causes that last little 'kick', which lets the balls roll to the other side. This module can also be broken down into four smaller sections for easier transportation: The motor which is part of my Automatic Motor Shutoff and Alarm System, The 'hopper' and 'ball diverter', The 'ladder', and The 'waterfall'. There is only one M-motor powering this module and that helps ensure the timing of each section is in sync with the next. The motor section is attached to the 'ladder' section with a universal joint, and the 'ladder' section is attached to the 'hopper' section with a CV joint. The 'waterfall' section doesn't need any motor input, so it is attached to the 'ladder' section with a single axle that allows it to be detached easily. Between the 'ladder' section and the 'hopper' section is differential (hidden away underneath), and I can manually adjust the rotation of this differential via a worm gear to get the timing between each section just right. Apart from this one worm gear used to make timing adjustments, I haven't used any other worm gears as I have seen the damage they can do to GBC modules if something gets jammed (although, in theory, my Automatic Motor Shutoff and Alarm System should stop this from happening anyway). There are quite a lot of gears within the drivetrain, but it runs quite smoothly. When I was creating it I thought the weight of the 'ladder' would cause a lot of strain on the motor, but when one side is going up gravity is making the other side go down which cancels out a lot of the strain. Jams sometimes occur in the 'hopper' and 'ball diverter' sections, and are typically caused by too many balls in the hopper, or the timing of 'ball diverter' not being adjusted correctly. I have had this running at a public expo that my LUG held, but I was too busy to baby-sit this module, so it was only running part of the time, but when it was running it ran without issue. This is the first GBC module that I have made, so I spent a lot of time trying to get it working consistently. I hope you like it. Any constructive feedback/comments/questions are welcome. UPDATE: I have created an LDraw/MLCad file of my GBC module. Read more here. Music:
  24. I rarely post but I check this site and other Lego Technic sites like Sariel's and GBC websites and I am stumped on a way to mechanically make this work. I am trying to use the Lego differential in a way that I have not seen others use it, at least in the searches I have performed. Limitations: Input motor needs to constantly run I would like to do this purely mechanically. Cannot use Mindstorms. Would prefer to not use switches unless necessary. Problem: I am trying to use a Lego differential to power two separate sections of my build. I don't have access to easy pictures so please see the simple diagram below. I have power on one axle and the two other axles will drive separate sections. I would like Section A to run constantly (or could potentially stop when Section B is running). Section B is currently being held up by a ratchet that completely stops the gear from turning until it is released, When released, Section B will run one full revolution then stop again until the ratchet is released again. The ratchet release is not on a pattern. It can be released 20 times in a minute then not released again for an hour. The issue that I am running into is that Section B currently has a higher load than Section A; therefore, when Section B's ratchet is released for the gear to run one full revolution, the load is heavier than Section A and Section B does not move. Solutions I can think of: Make the load on Section A larger than that on Section B so that when the ratchet releases, Section B will be easier to move than Section A and the differential will transfer power to Section B and it will work. I would rather not arbitrarily add to Section A's load unless that is the only way. Otherwise, maybe engage a ratchet on Section A to stop that section completely but then disengage exactly after Section B has completed one revolution and at the same time, stop Section B from running. I would think this is more difficult since at least one Section will need to run at a time so the motor and differential don't break but I could be wrong. I'm currently using the 28-tooth differential with 3 - 12-tooth bevel gears (BL: 62821b) inside a 5x7 technic frame Simple diagram: Section B ----------|---------- Section A -----| Differential |----- Input Motor Any help is appreciated. Thanks.
  25. This great ball contraption module uses I mechanism that holds the balls until there are 13 in it, then the mechanism gets triggered and it started lifting the balls and dumps them into the next module. It is quite a complex mechanism, it works well, as long as it runs at the same speed you set it up for. As far as reliability, it is quite reliable when it is set up to get triggered by 13 balls, and even more reliable when you are ok with 12 or 13. (if you have not guessed by now, this was built for the Great Ball Pit challenge to build a module that only outputs 13 balls at a time) I don't know how log it can run, I have ran it for about 45 minutes and it has not had any problems, but I would not be surprised if it stopped working after a few hours. Hope you like it, there are more photos on flickr here.