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Found 175 results

  1. 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
  2. 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
  3. I took sawyer's Spiral Lift to a higher level xD Sawyer's thread 7 levels and Akiyuki style and input.
  4. 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.
  5. 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...
  6. 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.
  7. 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.
  8. 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 :)
  9. 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.
  10. 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.
  11. 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.
  12. 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.
  13. 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.
  14. 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.
  15. RohanBeckett

    [GBC] Hailfire Loops

    So what do you build, when you have 4 Hailfire wheels? an oversized GBC module! I had an idea to build this a while ago, and finally finished it for Brickvention 2018, in January. However, it wasn't reliable enough, and ended up needing 2 motors to drive it. I recently rebuild the main geartain, using better parts, and working hard to get rid of all friction points. It now runs MUCH better, on a single L Motor. Front loader section is an Akiyuki design, from Cycloidal Drive. The rest, including the Brick Separator down-chute is my design. Due to the design, I was not able to use the inner teeth to drive the wheels... as the scoop would interfere.. so I had to drive it by the outer rim This has been done in the past, by other builders, using tyres. Somewhere along the line, I noticed that the old Samsonite gears from 1965 meshed perfectly! (The Expert Builder ones do not) I attempted to have the stepper/loader synchronised to the wheel, but unfortunately, I was not able to get any combination of Hailfire external teeth + Samsonsite to equal an even/repetitive interval. Turns out that it takes 7 revolutions of the Hailfire, before the same tooth on the Samsonite match up again! So.. that does mean, that occasionally, it'll feed in a ball at exactly the same time a scoop passes... and while most of the time, it bounces back into the main wheel.. sometimes, it bounces back, and spills. There is a small collection point for such spilt balls The Scoops are a simple build, and are held in place via friction the Hailfire wheels are supported by 1L liftarms on an axle, and there are 4 rubber wheels at N/S/E/W, that the Hailfire leans against, to run smoothly The drive-train feeds up and down each module - with the motor attached at Blue, since it's at the mid-point.. At the bottom of yellow, it connects to the front loader section. And since it's SO big, I needed to build it modularly! So it all comes apart easily! Looking forward to running this improved version at Canberra BrickExpo next month! Oh.. and apart from the depth.. it is actually GBC standard! :)
  16. This lego great ball contraption miniloop features a redesigned Cardan mechanism to lift the balls up. It is designed to be as reliable as possible while still being interesting. One of the parts that make it extra reliable is the loading mechanism having two technic pins to stop more than one ball rolling out at once. It can be powerd by a M motor or by hand but if you power it by hand you have to do it at the exact right speed, so it it better to use the motor. The mechanism uses two 12 tooth gears meshing together witch normally dosn't work to well but because they are slightly more than 2.5 studs apart it work well. If you want instructions I have the .lfx file here on Bricksafe or video instructions here. As you can see the differential gear is held in place by a 16 tooth gear, it works well but if it jams it separates you have to fix the timing of the whole miniloop. I am planning to reinforce it in the future with a 3L technic beam.
  17. This lego great ball contraption module uses two "minecarts" and a conveyor belt to lift the marbles. The module is quite reliable even though it has so many gears and moving parts. The carts have extra plates on the bottom to make them heavy enough to pull the strings down, as these strings are quite stiff. The Instructions and part list is on rebrickable here. ↑↑↑ This mechanism with the two 2L technic beams is what makes the carts stop at the top to let the marbles in. The PF switch is attached to the servo motor witch flips the gearbox direction, this way the main XL motor always runs in the same direction.
  18. This Lego great ball contraption miniloop uses a screw made of technic flex tube to lift the marbles up, then they role down the ramp and back to the start again. The ramp is made of "cheese slopes" and hinge bricks wich make it flexible. The ramp can is flexible but if you want to bend it more than about 15 degrees you have to swap one of the 1x2 slopes for a 1x1 slope. It works well for short distances but might need to be supported if it is made longer. The LDD file is here. Some of the parts for the screw are missing because they are not in LDD, the screw should look like this: More photos here.
  19. after watching the brickworld gbc videos i saw that the workshop module is a ball pump and a stepper for 2019, does anyone know where i can find the instructions for the ball pump? thanks
  20. This lego great ball contraption module uses a three sided wheel with "forks" to lift the marbles to the next module. The module is surprisingly reliable but it can take some time to get it running well. The stepper used to load the main mechanism works fairly well but it could still use some work, as you can see at 0:50 in the video it does not always work perfectly. The instructions, LDD file and part list are here. I used 1x3 technic half beams instead of the correct 1x5 ones in the instructions becuase LDD does not have them. The differential gear is not essential, it is only to make it easier to set the timming of the loading mechanism.
  21. Great Ball Pit

    [GBC] D.R.O.P

    Hey Guys, Here's my latest GBC module D.R.O.P (dark red olive pusher). It's not the most exciting module, nor did I do the original engineering of the mechanics. I did however choose the colours and changed up the original design so that this is a bit more sleek looking. It's kind of slow, and somewhat unexciting, but I did manage to hook it up to a shared power system (later in the video) which runs 3 modules off 1 M motor with a simple axle chain using universal joints. Its reliable up to around 22 balls, any more and the arm may not be able to get underneath the balls to sweep them out. Having said that it *should* be able to clear the 1BPS rate of the GBC standard. I'm planning on running this at BrickCan next week and if the module does seem a bit slow I will regear it from 8-40 to 24-40 at the lift-arm.
  22. This lego GBC miniloop uses three technic lift arms to push the marbles up a ramp, then they fall onto another ramp. When a second marble falls onto that ramp it tips them down another set of ramps and back down to the start again. It is quite reliable if you place all the 1x1 "cheese" slopes straight but it can get stuck if they are not straight. (using 2x2 cheese slopes would fix this problem but I did not have enough in dark grey) The instructions are here. I also have a LDD file for it but I can not find any place to upload the file as it is not a standard file type, any suggestions?
  23. This lego great ball contraption miniloop uses a spinning wheel to lift the balls up onto a set of ramps. Then the balls role down the ramps and back to the start again. I have remade this in lego digital designer but can't find any good way of making PDF instructions from it, any suggestions on how to do this? Exporting the instructions as a HTML building guide does not seem to work very well (it does not show a parts list for each step) the instructions are on reabrickable here.
  24. I'm busy making a mechanical ball counter GBC and designed the below cipher wheel. There will be 5 of them so counting to 99.999 because per event day about 26.000 balls can run through a GBC. Each cipher wheel can be taken out to set to zero because I don't want to turn the wheels back 26.000 times and the end of the day. The mechanism to pass on 1 turn per 10 turns is an excellent design from Pallax. When more parts arrive I hope to finish it soon and present a video.
  25. So a few months ago I made a smaller version of Akiyuki's invisible lift, the problem was that I didn't have instructions for my version and it was not very reliable. I have now made a new version which is more reliable and uses less pieces.