PG52

Eurobricks Vassals
  • Content Count

    62
  • Joined

  • Last visited

Everything posted by PG52

  1. PG52

    skilift/gondola

    For fixed grip, I don't know, but you may be interested in my work on detachable gondolas : the way the grip works can be adapted for a fixed grip chairlift. https://www.youtube.com/user/pg5200/videos
  2. PG52

    42100 - Still a toy?

    Given all answers, I think the question is irrelevant in itself. Whether it's a toy or not is dependant to the use you are - or the persone you're offering it to is - doing with it, not that much the price - which is seen differently by everyone : for me $450 is a lot, for people who earn $3000 a month, it might not be. If $450 is affordable and you buy it for pleasure / collection or so, you may consider 42100 a toy. If you're a children and get 42100 as a gift, then obviously it's gonna be a toy :) If you're a MOCer and get it as a part binge, then it might not be a toy. More like something that enables you to get pleasure building / engineering something yourself, some kind of logistics supply. (I'm it this category ^^) If you're a worker at Liebherr and buy 42100 as a engineering demonstrator (which it could be, why not ?), then it's a working tool... And maybe, also, a toy for you. And I'm probably missing many situations where 42100 could be considered as a toy, or not. Soo... just my point of view :D
  3. @AnkokuThanks for sharing it. I saw that yesterday. They're telling that they got inspired by another module on the internet, and that they didn't know mine was the original one. I asked them to give credit to me, which they did, at the bottom end of the description of the video... But not on the video itself (not sure if it's possible without re-uploading the whole video though). Well, although there is a lot of extra work in this build by adapting the module and creating the other ones + making the instructions, it feels quite weird as you say. I guess i'm gonna let things happen this time, I don't wanna overreact either, but yeah that doesn't feel right. I think there was already a discussion about this kind of "copyright" thing, I know it's also cultural, but they are dutch, I'm french, those two cultures are not that different... If I were them I would have asked the person whose video they saw - who apparently didn't give credit either - , if I could use the module and make money out of it... That would feel better to me.
  4. Thanks for doing that, it's nice of you. I tried Studio, found some similarities with LDD, the soft seems well done. However it's quite difficult to work with it using my 15' laptop... Studio is definitely not designed for small screens ^^ While modelling, you might have some trouble with the bracings, as triangles are not exact (not far from exact though). Apart from this, it should be straightforward.
  5. @Ankoku The folder is now public : http://www.brickshelf.com/cgi-bin/gallery.cgi?f=576510
  6. PG52

    [GBC] Separation Anxiety

    Lovin' it for the same reasons as XGBC :)
  7. @Ankoku About my module "the sun" : I'm glad you like it. It was already quite reliable in the video, and with a simple fix it gets pretty much 100% reliable in perfect conditions (it has no rigid chassis, so it requires the table it's sitting on to be level and stable). It ran during to exhibitions (about 30 hours) without dropping a ball, but on its own and on a very stable table each time. I uploaded some pictures on my Brickshelf gallery : http://www.brickshelf.com/cgi-bin/gallery.cgi?f=576510 (not yet public though now public :) ) The module needs to be adapted to be operated in a module chain, especially the feeder at the bottom which currently requires to be constantly fed by balls, otherwise there is a risk of a ball getting stuck between the fixed ramp and the mobile feeder... But with 28-30 balls in a loop, that problem never appears and the module works flawlessly. I guess replacing it by a classic 3-balls-wide feeder would work well, I might do so at some point. Here is the fix (the two black beams sticking out), to prevent the buckets to jump over the upper ramp and get the module stuck. The problem appeared on an uneven table, because the support beam for the upper ramp is not rigid and allowed the ramp to bend towards the rotating wheel. The problem can be solved by making that support more rigid. I would suggest transparent beams to keep the aesthetics, but I don't have any so I left it like so. I didn't make a CAD file as there was no demand and I think it still needs improvement, but feel free to do so and modify it if you want to :) P.S. My previous module "connecting rods" (https://www.youtube.com/watch?v=YvXC_VehBKk&ab_channel=pg5200) used the same principle with 3 balls per bucket, it was not 100% reliable but was made to be used in a module chain. The problem came from the feeder, I think it had to do with the vibrations of the whole thing but I couldn't find how the ball was getting out of its ramp. I tred to film it and obviously, it didn't happen during the footage...
  8. PG52

    Adjustable Spirograph V9 by PG52

    Well, I'm happy to hear that ! I think mine ran during 2 or 3 exhibitions without any problem. There are so many gears though that moving parts might get harmed on the long run... At least I tried to keep the stress and strain as low as possible in the drivetrain.
  9. Hi everyone ! I'm opening this topic to show you some of my creations, which are small and/or not very technical and do not deserve a separate topic imho. I'll try to keep this first post updated, it will act as a summary with links to the different posts to make them easy to find. Feel free to comment, ask questions and give your opinion on this topic. Constructive advice and tips are always welcome :) I'll answer as soon as possible. Also, I'm french and my English can be messy sometimes, so if ever you read something I wrote that you don't understand, that's probably not you being tired ^^ Enjoy ! Manual tractor and second version
  10. PG52

    PG52's creations

    Thanks everyone for your comments ! Glad you like my little tractor Yeah, sadly the hoist has to be this massive : I first wanted to use a worm gear like on #8284, but it didn't look great at all... I agree with you, small cylinders would be nice for many features that only need a small stroke. Actually, I could have used small pneumatic cylinders, which would fit quite well in terms of length, but they are yellow and I would need to add a pump somewhere ^^ I was told on french forum Techlug that the roof and the front didn't look so great, and that were the parts I liked the least on this MOC. So I decided to go for a V2, and this time, I managed to fit a HOG in ! The axle of the HOG is connected to a triplet of 12t gears, just above the differential, which drive a 8t-rack on each side just as it works for the steering wheel. I used the old 10t racks : it may be possible to only use parts that are still produced today, and I'll probably try to improve this point in the near future as this MOC has been really pleasant to develop till then :) The rear axle is narrower in order to better fit the scale. I also had to add one more stud between front and rear axles, otherwise the hood looked quite odd (I'm not building a Cyrano Dutra, or even odder - but really nice-looking to my mind -, a Bisomtrac ^^). I also added some details : working lights and mirrors. Those inverted slopes are really practical for this application ! Some pictures : Cabin, with new seat and dashboard, flat roof, working lights, mirrors... : The front end is more agressive than before. Notice that the cabin is now narrower at the top (10t) than at its base (11t) : I used frictionless pins to make the angle of the thin cab pillars, but the main chassis is rigid and geometrically correct. Open hood : Another try with a black hood : The chassis is much cleaner and more compact. Here is the underside view : I had to replace the 24t-8t for the fake engine by a 20t-12t to keep the chassis solid and rigid. Great weather is announced for this week-end, I'm gonna be able to make a little video :) Hope you enjoyed this second version !
  11. PG52

    PG52's creations

    Hi everyone ! This is the first small MOC I'd like to present here : a manual tractor. Not a big and powerful one, but a small tractor like those you can find in many farms in France : they are used for works that do not require a lot of power, such as cutting the grass, clearing snow, carrying small trailers... Aesthetics is quite basic, but I included some details : mudguards, front and rear lights + flashing light on the roof, openable hood, exhaust chimney, tow ball... The cabin includes a red seat, a working steering wheel, a (sort of) dashboard, ventilation grids and the lever for the PTO on the right side. Hood opened : Underside : This tractor has some features : rear wheel drive, an inline 4 cylinder engine, steering, disengageable rear PTO, pendular suspension on front axle, and a tool lifting device at the back just like real ones. Here are some views of the mechanics. Color code is as following : - Grey = chassis - Yellow = propulsion + i4 engine - Red = PTO, dark red = lever for engaging PTO - Blue = steering - Green = pendular suspension - Tan = tool lifting device - Brown = towballs for tool - Pink = towball for trailer Propulsion and PTO : Steering with accurate Ackermann geometry and pendular suspension. Sadly, there is no hog because everything already barely fit inside ^^ But even if the steering wheel is quite accessible, a HOG would be a great improvement for playability. Tool lifting device : a complete lift requires 7 rotations of the 12t gear on top. Yon can see the position of the PTO (red) and the trailer towball (pink). I really took pleasure building and improving this MOC over time, it's been built for over a month now and I think it's now finished. I don't know if I'll make a second version to implement a HOG, that would be a good improvement but I have other plans for now :) Video will come as soon as possible : I'm waiting for some good weather, as I'm only have an old camera which requires stability and strong light to take nice videos. Pictures are not a problem, as I can set a slow shutter speed. Thanks for reading, I hope you enjoyed it !
  12. PG52

    Advice for my ski lift?

    Hi ! First of all, sorry for my english, it's not my native language :) I have to say that your winter village looks awesome ! So much detail, and something that makes it even more beautiful : it has hills ! Really like it :) You want to make a fixed grip ski lift, which I'm not specialized in at all (I'm much more in detachable and technical stuff), but I might have some advice which can be applied to fixed grip lifts. Even though I was never able to make any working properly... About the problem you have with tightening the cable, you have the chance to work on a diorama on which you can attach things on. On such a small-sized lift, a solution could be to make a structure underneath the landscape which would link together both up and downhill station, and also the towers. That way, the only limit for tightening the cable would be the rigidity of the structure. About the towers, what you can do first is link together both sides of the top part of the tower (I think the right word is "shelves" or "schieves"... Can't find it) : basically, as you did, both sides can curve independantly but you can fix them on an axle that runs across the tower to get more rigidity. Then, using the following principle for mounting the towers can help : the more tightened the cable is, the more stable the tower will be. For this type of "support" tower, as soon as the ground is solid, you don't need any foundation for it. Fixing it using classic lego should work well. The more wheels you have one the towers, the more fluidly the grips will pass them, but the more alignment problems you may have. 4 wheels on each side is usually a good compromise ; 8 is useful if you have a big angle to make. You can also use 6 wheels, usually works well and not as big as the 8-wheels one but it is a little more complex (it's like a 8-wheel one where you replace one of the "4" by a "2"). 1 or 2 wheels is too few, it will never work fluently. 3 is useless if they are on a straight line : you must always have them articulated so that they curve naturally when the cable is on, and also for the grip to pass them correctly. The best minimum is 4, if you really can't use 4 or if it is only to stabilize the cable (almost no angle to make) then use a 2-wheel one, but articulate it :) About the stations you made, there is a problem : when the grip passes on the return wheel, it needs to be outside of the cable loop. But you mounted the wheel alignments on the outside, which can't work. Basically the shape of a fixed grip is like this : The stations are only the combination of an horizontal return wheel and a tower :) About the cable slipping on the return wheels, instead of using only rims, you could also use big motorcycle wheels like these ones : [Part 88517c02] Wheel 75mm D. x 17mm Motorcycle with Black Tire 100.6mm D. Motorcycle (88517 / 11957) Image source : Bricklink.com The "grips" on the tire are big enough to guide the cable properly, it never slips, and it is also quite thin so no big aesthetic problem. I usually use 1 mm and 1.5 mm nylon string, which work really well with these wheels. Hope that helps :)
  13. PG52

    Adjustable Spirograph V9 by PG52

    1963maniac, those two shifters are making the little offset which produces the shape of a drawing. If you block the axles, you obtain the same pattern indefinitely :) Basically, what this mechanism makes is adding X1 (=1, 2, 3 or 6) full rotations of one arm while the other one substracts X2 (=1, 2, 3 or 6) full rotations of the other arm, for one full rotation of the paper. The arms can also rotate at 1/2, 1/3 or 1/6 of the max speed → the speed reductions are V1 (=1, 2, 3 or 6) and V2 (=1, 2, 3 or 6). The important number is X=V1*X1+V2*X2. If X is an integer, then this will also be the number of "shapes" or "petal" (I don't really find an accurate english word ^^ Let's name this a petal). If X is not an integer, which is impossible with the V9 but could be obtained with another design, then the number of petals will be X*Y with Y the number of full rotations of the paper necessary for the pen to reach the beginning of the line. Therefore, if X=0, the you get no petal at all, just the same pattern repeating indefinitely, just like on my first spirograph. I hope this can help :)
  14. PG52

    Adjustable Spirograph V9 by PG52

    Wow, those instructions look very professionnal ! Thanks and congrats for your work :)
  15. PG52

    Adjustable Spirograph V9 by PG52

    It's fine by me :) Congrats (and thanks !) for achieving the instructions, such a long time-consuming process !
  16. PG52

    Adjustable Spirograph V9 by PG52

    Here are a few pics I took that could help to build the display part of the build :) I couldn't make those bright enough but in gives an idea of the build. A V10 will probably come along, I have almost all the ideas, just have to build it !
  17. PG52

    Adjustable Spirograph V9 by PG52

    Hey, I've partially modelled it on LDD, here is the current file if it can help you :) Spirograph V9 - DropBox
  18. PG52

    [MOD] RC Mini Buggy

    Nice look ! Glad you like it :) I tried to use the RC motor in bigger vehicles but they really give their best in light cars and buggys, maybe the only way to have a "punchy" model with power function ^^
  19. PG52

    Adjustable Spirograph V9 by PG52

    Hey ! Thanks for sharing Joris :) I planned to present it a long time ago, and well I never did. Now I don't have the spirograph with me but Joris managed to recreate it perfectly This version is quite like an achievement for this project as it works really well and uses only one M-motor to draw (it can work 3 times faster than in the video with less than the power of a M-motor, still drawing fluently. The limit is more likely to be the pen ^^). Next improvement, maybe, would be to use the new circle quarters of the BWE, but I won't be able to try it before months. Of course, feel free to try it, this is a community build now :) I'm glad that you like it !
  20. 27 : 10 16 : 6 37 : 4 26 : 3 41 : 2 25 : 1
  21. PG52

    Adjustable Spirograph

    Salut Clément ! Happy to see you there and thanks for your answer ^^ In fact, the right one was only the V3. It wasn't able to make the drawings that the V5 and later can create, but yes it was quite fast. The main differencies between V5 to 8 are the pure performances of the versions. V6 had the same than V5 with some additional features (which failed because the vibrations were too important). It had plenty of possibilities, it was fast but was vibrating constantly and needed too much power to work properly (anyway the plastic axles and beams did'nt like this episode ^^). The V7 solved the vibrations problem, had a lot of drawing possibilities but still required a lot of power (1*XL) to work well. (My goal is a spirograph working perfectly with only 1*M motor) The V8 finally solved the power problem, but sacrifying the number of possibilities (you can only choose the number of "petals" of the drawing, 1, 2, 3, 4, 5, 6, 7, 8, 9 or 12 ; that means only 10 different drawings. It also has an interesting new technology of drawing board, with a big intern gear made with 16 gear racks that increases precision and reduces the torque in the mechanism. I'm always looking for a version having the qualities of the V6, 7, 8 and not their problems :D
  22. PG52

    Adjustable Spirograph

    The fifth is done for a long time, see the first page ;) I've already built the versions 6, 7 and 8 but I have really no time nowadays to publish videos or reviews (like any student in a mechanical engineering school, I don't have so much time for me and I prefer spending some time to build than to publish... However I still take some pics and vids of my MOCs to publish them later :) ). Something will probably come in almost a month and a half :)
  23. Yes, but at which scale ? I use the 8421 wheels and I ordinary use a little variable camber angle, no caster angle (because of too much friction with the McPherson suspension so I use a double wishbone system), and a pseudo-kingpin inclination (the steering respects the kingpin inclination but the suspension only works following a vertical axle). It's quite difficult to respect all the criteria well with 8421 wheels and FWD. Some solutions exist to have the caster angle, which helps driving straight ahead, with a correct geometry and ground clearance. But none have still satisfied me.
  24. PG52

    Adjustable Spirograph

    Hi ! The LDD file (the previous link is broken) : https://www.dropbox.com/s/qskfqojh2usf05n/Spirographe%204-2.lxf?dl=0
  25. Definitely, but I'd add suspensions which are useless only on a perfectly flat ground. And the most important thing is for me the front wheel drive to make the model a bit playable, especially with 2 RC motors, because even with a one-RC lightweight model it is impossible to drive straight ahead with RWD... To my mind 4WD are not necessary but, to have tested, the performances are a bit better, one RC-motor by axle makes the car turn (steer ?) better at high speed than two RC-motors on the front axle. A gearbox will only make your drivetrain less efficient, you'll not have a better top speed because the RC motors don't have enough torque to accelerate more.