Search the Community

Showing results for tags 'PF'.



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, Mindstorms & Model Team
    • 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


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 216 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 Greatballcontraption.com
  2. Hi all, since 7777 book came out, I've always wanted to integrate Trains and Technic worlds. Back in the 80's the problem was the complete lack of train wheels with a Technic axle hole. It was solved with RC trains a lot of years later. Therefore, I can convert a 9v train to PF without too many problems (aesthetically speaking). But for 12V trains it is different. Wheels are made in a specific way, they have the hole for connecting rods, they're more "fat" than RC/PF wheels. Frankly, I do not like 12V trains converted to 9V/PF standard bogies. But I like the PF motor, its speed, the possibility to increase speed gradually...and the fact it keeps the central hole for third wheel. So, in these years I repaired a lot of 12V motors...and some were really in bad shape. Look at the right wheel, it is completely destroyed inside. So I decided to try to implement my solution to connect standard, intact 12V wheels to technic axleholes (which I do not list here, since it was not satisfying). First, I got a standard Technic bush, and cut it a bit. Then I put it inside the damaged wheel hole. It fits fine, but needs to be glued. Once glued, it is time for some testing. The 6-long axle goes right in - but the red ring coming out from the wheel is too thick. So I prepared another wheel (gray bush). This time I cut the bush a bit shorter and fits right. The 5.5 axle is perfect , so I'll need to cut two 6-long axles to the right lenght. And this is the result - this is my 7740 no°3, totally converted to PF. It works fine, but as you all can imagine, it is all made by hand and bushes are not machinery-centered. Therefore the locomotive is not stable as I would like. For the moment, better than nothing!
  3. Hello, I present you my latest model: Starting from the 42053 set, I decided to add some improvements and make it remote controlled with linear actuators and PF. The undercarriage is very similar to the original, with manual functions. Main mods are double wheels, and some aesthetic adjustments. The Power functions components are located in the upper-structure, except one motor which is in the boom. 1M motor for rotation of the upper-structure 1XL motor for the main boom 1M motor for the third section of the boom 1M motor for the bucket There is also a fake linear actuator to adjust the second section of the boom. I used this solution because this adjustable boom is more common in the real EW160E. Changeable buckets with quick-coupler: Access to the battery box: Power button with easy access: More photos: Video coming soon!!
  4. Another smart brick is in the making. Jason Alleman is one of the persons behind this initiative. This time the emphasis is on sound and lights. More info on Kickstarter: PFx Brick More info on: http://fxbricks.com/
  5. Updated: BrickController Android application. It lets you to control Lego creations via Lego infra-red, SBrick and BuWizz V1 and V2 using any Android compatible game controller: Current version: BrickController 0.32 User guide: BrickController User Guide Minimum system requirement: Android 4.4 and bluetooth low energy support on the phone (or tablet) Video on the older SBrickController application:
  6. Hi to everybody! I'm here to present my new Moc. I started building this crane truck about 6 months ago with the main idea of solving the problems related to a failed attempt of a crane for my previous truck. IMG_1608 by Lucio Switch, su Flickr Starting from the cab...despite the undeniable resemblance to the cab of the dump truck (with a bit of the tractor truck), it has slightly different dimensions, and the add of some new details/functions, forced me to revise it completely. In fact, in addition to the "standard" opening doors, this time, as on real trucks, the cab is suspended, while maintaining the tilting function and the working steering wheel and the front grid is openable. Moreover the seats are pneumatically suspended via 2 (1+1) 1x5 pneumatic cylinders. The chassis has the tractions on the 2 last axles, they are driven by 4 XL Motors and uses 2 Servo Motors to steering the first two axles (with different turning radius). The first two axles use independent suspensions. In this case I was inspired by the Mod of the chassis of my Tractor Truck done by Efferman ... that has a perfect shape for a fake v8. On the back there are 2 live axles (with a total of 24 hard shock absorbers). Between the first two axles there are two small pneumatic pumps moved by two L Motors. In addition to that, on the chassis are present 2 Li-Po Battery, 5 Leds for lights and 2 SBricks. Behind the cabin there is the base of the crane, it contains the front stabilizers, extendable via a M motor (connected to one SBrick), 6 pneumatic valves, moved by an M motor each, 4 IR receivers to control the 6 valves motors plus 2 other M motors, one to rotate the crane and one for the winch. The 4 receivers take power from a port of an SBrick. Finally the crane ... well, the classic design of this type of crane with the upper arm offset (as on 8258 for instance) built on this scale, gave me big problems twisting the whole structure ... and a lot of headaches. One day I came across by chance in a truck with a Cormach crane, it presented a unique design that would solve the twist problem. So inspiring to this design, I have developed my crane, which consists of a telescopic upper arm (extension via 2x 1x11 pneumatic cylinders) supported by two side arms moved by 2+1 2x11 pneumatic cylinder each. It isn't able to lift heavy loads, but it works and, considering the masses involved, I'm fine with that. Now some numbers: Length: 86,4cm 108studs Width: 24,8cm 31studs, 28cm 35studs with mirrors Height: 39,2cm 49studs Weight: 8.6 kg Total number of parts: 8000 PF elements: M motor: 9 L Motor: 2 XL Motor: 4 Servo Motor: 2 PF LED: 5 Lipo Battery: 2 ..and a couple of wire extensions Pneumatic Elements: Small pumps: 2 1x5 Cylinder: 2 Medium Cylinder old: 4 Medium Cylinder new: 2 1x11 Cylinder: 2 2x11 Cylinder: 6 Valve: 6 ..and several meters of pipes. For more pictures check my Flickr Album: Crane Truck Flickr Album And this is the video: To conclude, I would say that, in some way it was a new and interesting experience for me. Due to circumstances beyond our control, I was forced to transfer my Lego room in the basement, comfortable although perhaps a bit rustic but not directly connected with my apartment. This, coupled with the fact that my free time has been drastically reduced, has led me to review my usual workflow. So this is my first model built before digitally and then physically. This way allowed me to use better my free time and to select and pick up only the needed parts to build, reducing drastically the mess in the living room. Also part of the work for the BI is already done, I'll done them for sure, but I don't have idea when they will be ready. I'm afraid that it will be a huge job! I hope you like it!
  7. Commander Wolf

    [MOC] Miscellaneous Train Projects

    Finally getting around to posting some of these... I've been doing a bunch of small projects this year that I don't feel warranty their own thread, so this thread is going to be a home for said small projects. PRR MP54 Some years ago I built a set of PRR P54 coaches to go with my PRR T1. At the time I thought a fun future project would be to convert the cars to MP54 spec - the EMU version of the same car. Well, the future is now! Over the past few years I've been trying to build trains using all of various the LEGO motors, and the PF train motor was still on my hit list. I don't like the PF train motor that much because it doesn't have any low-speed torque, and the wheel spacing hasn't been correct for anything I've made so far. Recently I remembered about the MP54, and I thought it would be the perfect application - fast and doesn't need a lot of torque. Here is one of the original P54s as built: And here is the MP54 conversion: Of course the main difference is that there is a battery box, receiver, and motor in the MP54, but I've also updated the original model over the years, most noticeably by slowly collecting all the frames and glass. Other minor changes include the addition of headlights and a more vanilla bogie design to match the PF motor frames. Of course you want to see it go: I was really entertained by how fast it goes! Usually I prefer gearing down such that you get more torque and less speed, but watching this zip along is a fun change of pace. The pulling power isn't actually all that bad either, but as expected, you need to be going pretty fast before the PF train motor is generating any torque. One more interesting thing is that I'm actually using BBB wheels on the PF motor instead of the usual tyred wheels. I originally tried with the official wheels, but I due to the low torque I felt like it was really bogging down in the corners, so I tried the BBBs. This is a much smoother configuration, and it doesn't feel like I'm losing all that much grip. It can definitely pull at least the other two P54s and maybe another car or two. Okay, more to come soon. Hopefully.
  8. Hello, my entry for the TC6 contest it's a heavy forklift truck, the Hyster 32-12. The model has 8 functions (4 IR or 2 sBricks), it's 50% built at the moment and nearly completed on LDD/MLcad. Soon I'll put updates (photos, video, notes) Here a pic of what an Hyster 32-12 is: Thanks, and hold on for news. Video:
  9. Updated: The (almost) final version of the app is ready, app renamed to SBrickPad. For now, you can download the source from my GitHub page: https://github.com/BarakRL/SBrickPad If there will be enough demand I'll make it available for download from the App Store. The app supports MFI and iCade gamepads, on-screen gamepad will be added later this month. More videos coming soon. --- Well it's not done yet but it's getting there. I've added support for both iCade and MFI gamepads and many other features: precision controls (you can even set the easing curve if you want) SBrick connection recovery multiple actions per button event (press/release/value change) so you can control multiple motors with one button or simply play an engine sound while the car is accelerating load/save (and share) action sets import sounds many other things I can't think off right now Do do: Edit actions UI (you can now only edit the json file) On screen virtual gamepad (so it can replace the SBrick app for people without gamepads that still want more control) Make it pretty Documentation etc. The app is still in development, but the source is available to download from my GitHub if you want to play with it already: https://github.com/BarakRL I would love to hear your feedback!
  10. Ashi Valkoinen

    Okay, help me with PF train motors

    So I ran into a problem I couldn't solve on my own but reduced the possible error to the PF train motor. I have three, differently colored, but in dimensions and structure identical Stadler FLIRT electric motor units built from LEGO bricks. All three of them are powered with SBrick, using three PF train motors under each train. Here they are: I noticed that the yellow-green one runs slower than the other two, the speed difference on the same level of SBrick slider is very noticable, and there is a speed level when the yellow stops, but the other two runs on multiple curves and points with no problems. For first I thought that it could be the failure of the oldest SBrick in my yellow train, but when I replaced it with a new one, nothing happened. I measured output voltage on the output reserved for train motors, but it was just fine, only 0,02V less than the actualy batteries had. Than I replaced train motors, all three to brand new ones and the train became even slower. Than I replaced all PF extension wires between battery box and train motors, still runs slower. I measured the weight of the train, but they are 3882 and 3814 grams, the difference is only 68 grams (the yellow-green is heavier)., this is no explanation for the speed difference. Than I put the new train motors under the red one and it became slow as well. It is also noticable that a train with new motors is harder to push by hand than the train with older ones. So, my question is, did TLC change something in the internal gearing and other properties of the LEGO train motor? Neither Bricklink, not Brickset knows about the difference (if there is any), and the PF train motors has no production year printed on them, just "(C) 2005 The LEGO Group" on the bottom and a four digit code at one end, like XX JX, where XX is a two digit number, J seems constant (I checked 10 train motors), and the X after "J" seems increasing with time (my oldest motors have J0, J1 or J2, while newer ones have J4, J5, J6 underneath). The XX digit seems totally random. So does anyone know about any change in the inside parts of the PF train motor and could you advise me a method to select the faster ones?
  11. Paperinik77pk

    MOC - 7720 reloaded (DB E69)

    Hi all, I'd like to show you a little thing I made 6 years ago for my daughter...and then became unused on the shelf since it was "retired" by Duplo trains. It was a sort of DB E69, used to transport frogs and penguins (all made with Lego Basic sets instructions). After she saw the real 7720 she liked the whole set. So I created a newer "clone" of the 7720 locomotive. This weekend I decided to revamp it a bit to make it work again. So I modified the roof, the handrails, the pantograph (which now is very similar to swiss ones) and made it a bit more "studless". The battery car is now blue instead of Yellow. It was - and still is - powered by a Medium PF motor, since it was not Infrared controlled and the standard PF train motor was too fast. Instead of IR receiver, it kept a "vintage" solution to be started. I used the PF lever the same way the 7720 used the red lever on battery box car. The IR receiver can be put inside the battery car if needed. As you can see, I have the same 7720 inverters placed on PF track...and the result is the following (sorry for the video quality, the phone cannot do better than this). The cat likes this "reversing" feature a lot! Next steps: two long two axles wagons resembling the 7720 ones, and the white doors on blue wagon created in SNOT mode (or a simple sticker, if I fail ) It is a silly train, but I hope you like it!
  12. So I know that, in this forum, most of you are concerned with mobile models that require a battery to use, but I also figured this would be the best forum to ask these questions as the people here seem more likely to know about stuff like this. In order to not have to build around a battery box, I've been using 9v batteries and one of these: And it occurred to me that, for my table top PF builds (in this case a track switcher for trains, or an elevator in a building), I could have an AC power adapter wired to a PF connector. So I'd buy a PF extension, cut it in half, and connect it to these: https://smile.amazon.com/gp/product/B01GPQZ4EE/ (female adapter cables) and https://smile.amazon.com/gp/product/B012VQ5A7S/ (9v DC Adapter, 1000mA with 5 male plugs) I could instead get a 500mA adapter, but I figure AAA are 1000mA, and have been using the AAA battery box).
  13. What's your opinion on Power Functions 2.0, and the potential that we may or may not have a separate receiver unit for the new system? Do you want a separate receiver unit like what we have currently, or do you want a combo unit composing of both a receiver unit and a battery box? Also, how important is a separate receiver unit to you? (Shoot. It appears the poll isn't working.) My personal opinion is the following. 1: Sort of. 2: Sort of. 3: Sort of necessary.
  14. Hi all, A little presentation of my LEGO Forwarder named XXL for obvious reasons :) It has been a project in my spare time for some years now and still not finished (probably never will be...) Most basic facts: Weight: 6,7 kilograms Dimensions: 95xx36x50 studs Drive: 8 XL motors + hub reduction Steering: Forced by controlling front left with rear right and the other way around (because of the weight in combination with the huge friction from the wheels) Wheels: From 8466 (4x4 Offroader) Some vids from Youtube: Feel free to comment or ask questions, I´ll try to answer them :)
  15. Hello everyone It’s good to have some spare time but better that sitting on the couch is to present one of my last MOCs – Front Loaded Garbage Truck. The truck was made almost three months ago (but I done it from scratch in 8 days!) for our local LUG contest. The goal was to made something up to 2000 pieces and maximum of 4 engines. I thought that front loaded garbage truck could be a nice playable model and I haven’t seen much of them made from Lego. The truck of course fit to rules so it has a four remote functions like: - driving and steering - lifting arms - moving front forks In addition to electric functions there are two pneumatic (with manual pump) – dumping the whole body and opening tailgate. If you want more accurate specification: Weight: 1700g Dimensions: 19 studs wide, 22 studs high, 53 studs long (15.2x17.6x42.4cm) Parts: almost 1900 The truck is designed to emptying big waste bins. Whole process don’t take much time. Lifting functions are motorized so you don’t have to even touch a truck to dump wastes into body. Lifting the arms are operated by L motor connected to two big linear actuators. For moving forks I used a M motor and built a long shaft through arm to connect small LA’s. Each small linear actuator is driven by 6 universal joints. Maybe it don’t sound good but I have to say that everything works fast and fine. First you have to do is drive up to waste bin. Then lift it above body using arms. Meanwhile flap mounted on top of body opens itself and then you roll over waste bin with front forks. When bin is empty simply lower arms and put it onto ground. For driving I used XL motor with total gear reduction 1:1.4 That ratio gives you an opportunity to push truck by hand (and engine will turn). Steering is simply operated by PF Servo. As I said at the beginning there are two pneumatic functions. For opening tailgate I used one small pneumatic cylinder and for lifting body – two big cylinders. Lowering body and tailgate is done by gravity – there is no need to use air pressure. For more playability I made two waste bins – green and red. Maybe this is not a masterpiece but it had to be light. So what say more? I think that movie will say everything that possibly I forgot to write :)
  16. Hi Everyone, I have a pretty heavy model that I would like to put on treads. The final model will probably weigh something around 12-15kg. The model is also supposed to move at a certain speed (around 10cm per second). As a result I think I will need to combine several PF XL motors to get the necessary torque and speed. In my opinion I have 2 options: Option 1: Adders + Subtractor I would connect several PF XL motors via adders for torque and then a subtractor for steering. I think I would need to heavily (9:1) gear up each motor before the differentials because the small 12 tooth bevel gears in the differentials (for adders and subtractor) don't handle torque very well. So I would first gear up and then, behind the subtractor gear down, so that I get more torque again. Advantage: Model can go straight (thanks to the subtractor); No hard-coupling (motors won't suffer) Disadvantage: A lot of power from the motors gets lost because there are so many gears. I'm not sure how fast lego gears and axles can spin for a long time without breaking (PF XL motor 200rpm with 9:1 gear up = 1800rpm) Option 2: Several PF XL motors on each tread I would have multiple sprocket wheals for each tread that is driven by a PF XL motor. Advantage: Simpler construction; less power loss Disadvantage: Hard-coupled motors (coupled through the tread links); model never goes straight because all motors won't turn at exactly the same speed. My question is, do any of you have experience with very heavy treaded models? What's the best way to drive them? (so that they can go straight) How many PF XL motors would I roughly need for a 12-15kg model? Thanks for your help and let me know if my description of the problem doesn't make sense :)
  17. Edit, repaired post. Wow, how far i have come... **WARNING LONG POST** One of my largest creations yet: the Mobile Crawler Trencher! My goals: Reliable, kid friendly structure Easily carried Battery and motor (AA and M motor) Tracked, very slow and powerful Clutch gear (24z) and a reversible gearbox. Kid friendly speed, not enough to hurt (it makes it easy to stop, so it wont trench any hard things) Easily removable battery I am happy to say, all goals were accomplished. I believe 3 full days were spent constructing it, then i tinkered to get it just right. I got three opinions on it, all were positive so far, i hope you enjoy looking or commenting on it. I will not post a picture of any other trenchers, because i didn't take much inspiration from them. The features: Motorized: 2 function, reversible gearbox Driving tracks (forward only (1:15 gears) Bucket trenching spikes + sifters M motor geared 1:3 through a clutch gear (24z) Others: Guardrails Driver area (Left side) Lifting or lowering the bucket wheel Well, now the interesting part of all. Easily seen operator areas. Control area. Battery removal and reversible gearbox. Enjoy your day, or post away!
  18. I present my newest trial truck, a pretty special one, this Mercedes Uniknick: (folder: http://www.brickshel...ry.cgi?f=515930 ) ORIGINAL: http://www.brickshel...spiration02.jpg This construction has central steering, this allows to have only one gear from the driving motors to the wheels. Reduction is 5:1, or 3:1 (has enough torque with it). I didn't want to make an average central steered vehicle like dump trucks, so I decided to add something new. One of the problems was the stability. This kind of off road vehicles like to fall over, that's enough when one section(front or rear) is turned 90 degrees. So this one has a linked like suspension, but with gears and turntables instead of links( not my idea, TT made it in this truck: http://www.brickshelf.com/cgi-bin/gallery.cgi?f=444654 ): So this construction allows to do these at the same time: There is two version from this truck, one with PP wheels(secondary version) and the one with cutom RC4WD crawler tyres(primary model). The PP wheeled truck weights 1767 g, the crawler wheeled 1423 g. I know, it looks much better and realistic with the RC4WD tyres, that's the main reason I used them. The tyres give a bit better climbing abilities (PP wheels are still good), the highest obstacle was 1,5 times bigger than the wheels's diameter. For steering there is one XL motor to have enough power to do it. It's necessary because of the 16 t turntable driving gears, there are two of them, one on each side to make the steering reliable. There weren't any problem with it. Front lights: The hardest part in the building process was to make the central part, to be reliable and functional with keeping the proportions of the original Uniknick. I made a video for each version. Note the PP wheels abilities compared to the crawler tyre. RC4WD Crawler wheel: PP wheel: Hope you like it.
  19. This is a fully functional prototype of a brick (2 x 4 x 1) that we developed to make it easy to control PF motors with Arduino boards. It has a PF connector on the top to connect the PF motor and a 4PIn cable to connect to the Arduino board; it has 8 anti studs on the bottom to connect it to LEGO bricks. It allows controlling the direction and speed of the PF motors. We tested it with the M-motor, L-motor, XL motor and the train motor. This is the brick in action with an M-motor: Let us know what you think or what you would use it for!
  20. Hello everyone Today I will show you my new creation, security camera. This is a little different creation. It is build from 99% Lego bricks. Only non Lego part are phone (Sony Xperia S), camera (Sony HDR AZ-1) and batteries. Camera is powered by 2 M motor, one for rotation and one for tilt. Phone and camera are connected via Wi-Fi. VIDEO:
  21. Hi to all, Here is a short video of the last event I participate with All spanish replicas of Renfe from Aitoruco and myself. 2 diferent loops with r104 custom curves (printed by blastem), 20Bps cable bridge (Designed by Sheppo), R104 trains (designed by Aitoruco and MTRkustoms) and also working narrow gauge (by MTRkustoms) Enjoy it
  22. I am getting close to the end of this long term build and it's time to share some pictures and a bit of the story. Even before I had finished putting together 10231, I decided I wanted a Crawler to go with it. Being a Technic fan it had to at least drive around and lift the launch platform and shuttle. Those two basic goals spawned a project that has lasted a little over 2 years so far. Some ideas have stuck around since their inception, others were a bit optimistic (like building a peristaltic pump and hoping I could find a way to control the pneumatics hydraulically). February this year marked the 50th anniversary of when the two crawlers went into service, so recently there has been extra motivation to finish. The base equipment; - 16x M-motors (drive) - 4x L-motors (pneumatic jacking and leveling) - 4x IR Receivers (V1 as the V2s do not like driving multiple m-motors on a single channel) - 4x NXT servo motors (steering) - 4x RCX rotation sensors (measuring jacking level between truck and chassis) - 2x NXT bricks (one master and one slave. The master communicates with the Android Tablet and coordinates itself with the slave. Programmed in LeJOS) - 1x PF IR-Link sensor (link between master NXT and all PF motors) - 2x PF Battery boxes (with thermal overload removed) - 1x Android Tablet Future add-ons - Accelerometer (automatically detect the crawler is on a gradient and adjust the leveling to suit) Bricksafe folder is here: http://www.bricksafe.com/pages/OzShan/Crawler Firstly, a couple of my favorite reference pictures; The build itself started with the trucks, thinking that the pneumatics and LAs would dictate the scale. First proof of concept - build a coupling to give height, pitch, roll and yaw to the truck. The pneumatics need to be on their own gimbals too. The reinforced 2x2 rounds slide and rotate in the 4x4 macaroni's. It is on the limit of what will hold together without glue, but it does hold. The two 1x2 technic bricks at the base of the 2x2 column are helped a little by a string (not pictured) which runs up through the 2x2 rounds with the axle. Initial prototype of the drivetrain. I would have liked a higher ratio but there was just no room at this scale. When the gearbox was married with the truck chassis I had to juggle positions, so you will see in later pics the crown gears are facing in not out Best laid plans.... Marry studded and studless they said. It will be easy they said... Showing what will eventually be the steering between chassis and truck. The guide tube and pneumatic cylinders are all on gimbals with the pneumatics coupled together. The average height is preserved during any tilting. With prototypes sorted, it's time to bricklink some parts and quieten down the colour scheme! (thank you 42030 for providing 5L thin liftarms with axle hole in LBG color) You can see the relationship between "guide tube" and cylinders here. The pneumatic system was overhauled too many times to remember but this is what it arrived at. It is all controlled by the direction of the motor. Running forwards drives the pump. When running backwards, the lobes operate the pneumatic valves in series, letting small amounts of air escape each rotation. This lowers the chassis in a slow and controlled manner. The motor can be turned on or off and run in either direction at any time due to the valve timing. Early attempts with PF Servo and NXT servo just couldn't park the valve reliably and after a few operations I would hear a slow leak. I have been trying to keep up with the LDD but it's hard to stay motivated when I know I'm just going to have to suck it up and move over to LDraw if I want to include all the motors, pneumatics and LAs Works so far; (I'll make the files available if anybody would like them). I found LDD essential in the early days to plan ahead and simply find parts, but later on the build overtook it. Original 'box' pump. 1x PF XL motor, 4x 6L pumps running at 90 deg to each other. Very smooth but bulky. Flatter attempt in the same vein. The truck itself. The final design for the height control modules. I hope you enjoy the build so far. More pictures to come of chassis, steering, leveling and interior details. I'll leave it to others to decide what 'theme' it belongs to .
  23. Question: What do you get, when you cross a tank, with a banana, a scorpion, a V8 engine, and a bunch of stud-shooters? Answer: The Banana Scorpion! Color scheme: Yellow, with some black and grey. Driver: A Big Giant Banana-eating Tiger! (this one) Powered Functions: Drive: Tank tracks - powered by 2x M-motors. (also used for steering) Steering: Tank type skid steering. Engine: A massive V8 - powered by a high speed motor. Wacky function 1: Lifting hull mechanism - powered by M-motor. Wacky function 2: High speed spinning sweeper - powered via V8. Wacky function 3: The ability to tank-wheelie!!! (with some help...) Manual Functions: (aka: weapons) Cannon: A giant cannon mounted on the end of the adjustable scorpion tail. Stud-shooters: Front: 2x six-round, and 2x single-round - Rear: 4x single-round. Spring-shooters: 2x rear-mounted. (can be triggered by driver) The story of how The Banana Scorpion was built:
  24. Hello everyone. After a very long time, I would like to present you my new creation. Its a BMW vision M power. As you will see later, the vehicle has no special features, since from the very beginning, the idea of building was primarily in the design and form of the car. The idea was of a typical character in the BMW style. A kind of prestigious futuristic retro sports style with recognizable BMW lines. PF components are: - 2 L motors for drive - 1 servo motor for steering with funtcional steering wheel - 1 M motor for 3 speed linear gearbox. It was the worst decision and design in my life for this gearbox.When I built and tested, it all seemed to work wery good.Now it is finished and definitely a total breakdown. After eight months of building this car, I simply do not go all over and repair it all. There is no chance. - 2 V2 recievers - 1 big batery box Some pictures. And my favorite photo. And the video. Thanx for watching. Best regards, Valter
  25. I had a long conversation with Roni of BuWizz fame about desirable vehicles used with his invention. Apart from electrifying large Lego technic vehicles, we were thinking about producing a simple and low-part-number vehicle, which can be quickly build and used. Well, this was the intention, however I was not very successful with this. I mean, it's not a problem regarding dimensions etc., but more of a general shape. My cars look like something from another world but not in a good sense. So, please Sariel and other well established builders, perhaps you could just skip this presentation:-) But then I have spotted Mini Mining Truck in 42055 and it seemed cute (perhaps I am a bit biased towards large models but small technic models are generally quite nice and full of features). Therefore I decided to motorized it. At first I've tried with Lego components but found out there is no room. Then I decided to use BuWizz, since allowed a bit smaller footprint. However, the truck kept growing in size. I have motorized the propulsion (I wanted to add the differential, however it kept the truck to slip while navigating rough terrain), steering and raising/lowering the dump. In addition I have also put in some lights, however BuWizz application at this moment does not support switches (hint, hint) so using lights is a bit of a drag. There are several issues I did not addressed properly: single back wheels (not enough room at this scale), not uniform color (lack of parts), cabin missing (I used the space for cables) etc. I have rebuild the d*mn thing at least 10 times but I guess this just speaks about my inability to do great technic job. Nevertheless, the truck moves and it's quite fun to play with. And I guess this is one of the main features.