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Leonard Goldstein

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Everything posted by Leonard Goldstein

  1. Leonard Goldstein
    Hi @JamesJT, this is great and the jumping performance is really good. It is definitely a frontrunner in the BuWizz contest I am working on my entry. But I am not sure, if I can make it. I need to take an outdoor video and weather conditions are quite bad at the moment. By the way: BuWizz delivery is quite fast. Having no BuWizz is a lame excuse for skipping this contest Good luck! Leonard Goldstein
  2. Leonard Goldstein
    Hi everybody, this week I had time to make at least a little improvement of my luffing crane: I fixed the lowermost gear block with some additional structure. No big deal, but I hope it will solve some issues. The LDD-File is updated and the new structure is sub-grouped and color coded (like you can see above): https://bricksafe.com/files/Leonard_Goldstein/luffing_crane/Luffing-Crane_42055-C-Model_by_Leonard_Goldstein_20180323.lxf I also tried to fix some tolerance issues - but I have not made it , sorry! Sometimes there is a curse on LDD ... Well, that's it. A new project is coming up. And it is BuWizzed Regards Leonard Goldstein
  3. Leonard Goldstein
    What a great idea for a contest And I ordered a BuWizz right now. Not only to join the contest but to support a start-up with a great product. And be fair: this whole forum is a support for a multi-national business group that makes billions of Euros - so why not supporting a start-up? Nothing wrong with that. And the prizes are generous - they will have to sell at least 50 BuWizz to be economical with this contest ... Best wishes to all competitors and to BuWizz, too Leonard Goldstein
  4. Leonard Goldstein
    Wow, so much traffic here - and I am away from my Lego ... I am so sorry! I know there are some issues in the LDD-File. As @johanmyst mentioned: some connector pins did not fit properly. I will try to fix this, but I am not sure, if I can manage it. In such a big model there are a lot of tolerance problems. Any hints are welcome Now the gearbox: I know, this is not a perfect solution. I also had the problem, that the pins popped out - but only in one motor direction. The other direction works without issues. That is why I blocked one motor direction (like it is made at the BWE). I will try to find a better solution for this. Of course your are right. The motor is really stressed with all this gears and this huge crane needs a lot of power. For the video I used a rechargeable battery (8878) which has a little more power in my opinion. And there is a lot of room for improvements if you skip the restrictions of being a C-model ... The rope: I used a rope that is similar to the one used in the 42038 and it works fine. But make sure the node of the loop does not move around the pulley in the engine house (as the rope is wound 2,5 times around the pulley). You can improve this a lot by using a rubber tire instead of the pulley and wind the loop only one time around (half a time to be exactly). The mounting of the ropes is quite tricky. First you should mount the loop and it helps a lot to disassemble the green sub-structure: And you should fix the set of pulleys inside the boom. This can easily be done by some cross axles. With this tricks it should be a lot easier to mount the loop. I hope I could help a little. I will try to fix some of the issues as soon as possible, but be patient please. I am quite busy at the moment ... not much time for Lego Regards Leonard Goldstein
  5. Leonard Goldstein
    Hi @johanmyst, that is really great! I hope the quality of the LDD-File is acceptable for this. I am still to busy to spend much time on my Lego. But if you have any trouble, please let me know. Regards Leonard Goldstein
  6. Leonard Goldstein
    3: 10 2: 6 10: 4 24: 3 18: 2 16: 1 So many beautiful entries! It was quite difficult to portion the points. Good luck to all competitors!
  7. Leonard Goldstein
    Hi @Bering, many thanks, I am glad to hear that. I also hope there will be somebody make instructions for it (I am to busy the next weeks - sorry!). At least I could add some hints how to lay the ropes as this is essential for the function of the claw. Regards Leonard Goldstein
  8. Leonard Goldstein
    Hi @Doug72, many thanks for your example. Maybe your solutions works also fine because there is only a bearing on ONE side? In my picture there is only one bearing visible but I used bearings on both sides of the gears. Well, my clamp is very friction critical because the rope is sliding on the pulleys if there is to much resistance. And it starts rocking when rotating the clamp. But with the bevel gears it works fine. Regards Leonard Goldstein
  9. Leonard Goldstein
    Hi everybody, some more information to the clamp (and maybe an interesting detail concerning a 12:24 transmission): Lets have a look at the gearing: And now the clue: the 12:24 transmission (green / red) uses 6589 bevel gears instead of 32270 gears. Why is that? The correct center distance is (12+24)/2 = 18 mm The real center distance is sqrt(2^2 + 1^2) = 2,236 Stud = 17,89 mm This means that the very often used 12:24 transmission is an illegal build! A single arrangement is not to critical because of tolerances, but a symmetric arrangement produces a lot of friction: There are some clocks around here in the [TC13] which of course are very sensitive to friction. If a 12:24 transmission is used the bevel gears might help to increase authonomy. Regards Leonard Goldstein
  10. Leonard Goldstein
    Hi @BrickbyBrickTechnic, many thanks! It was quite challenging to make this all work I know, my last post was a little bit short - only the links to the video and the LDD-file (sorry!). Well most of the structure is not to complex, but I think the engine-house is worth to give some more information. And here it is: The engine-house consists of three parts: Red: working section Green: steering section Blue: power section Lets start with the working section. The different colors mark the six function: Red: winch Green: rotating the claw - the green structure is a sub-assembly to make it easier to mount the rope (Note: wind to rope 2,5 times around the pulley to produce enough friction !!) Blue: open/close the claw - the axle is connected to a pin with friction. This keeps the rack in place while this function is turned off Yellow: rotating the superstructure - the 8T-gear meshes inside the turntable Pink: moving the boom using the two linear actuators Azur: driving on the rails - the vertical axle is placed in the center of the turntable and runs the two winches inside the bridge Next the steering section. Same colors as before. As mentioned in a post before there are only 4 clutches available in the 42055. Therefore the blue and the green function use an "old school" solution with alternately meshing gears. On the back side you can see one brown axle. This is the connection to the power-section. And finally the power-section. It consist mainly of the battery box (yellow) and the XL-motor (green). A nice detail might be the friction clutch (blue) which consists of two sprockets 57520 an a tyre 61254 inside. To active the clutch the sprockets are pressed together. This is realized by a moving the motor with the red suspension. Regards Leonard Goldstein
  11. Leonard Goldstein
    Hi everybody, it took some time to complete the LDD-file and the video (thanks for your patience), but now it is done. Enjoy! And the link to the LDD-file: https://bricksafe.com/files/Leonard_Goldstein/luffing_crane/Luffing-Crane_42055-C-Model_by_Leonard_Goldstein.lxf Edit 14. Nov. 2018: Please note the latest changes ( https://bricksafe.com/files/Leonard_Goldstein/luffing_crane/Luffing-Crane_42055-C-Model_by_Leonard_Goldstein.lxf ) and also have a look at the explanation of the rigging on the following pages. There are a lot of groups to handle the assembly structure. I hope this makes replication easier. Unfortunately I will not be able to create brick by brick instructions in the near future. If anybody likes to do this job, feel free to publish it here And if there are any mistakes in the LDD-file, please let me know. Regards Leonard Goldstein
  12. Leonard Goldstein
    I like this idea , looks like modern art. Good luck for the contest. I think you have good chances to make it to the podium.
  13. Leonard Goldstein
    Hi @3650tom, very interesting Like others said: use thinner material. A "lightweight tube" like this might solve your problem: https://www.bike24.de/1.php?content=8;product=12979;menu=1000,4,22,36 Keep us informed Regards Leonard Goldstein
  14. Leonard Goldstein
    This is thinking outside the box Well done, I like it very much! Regards Leonard Goldstein
  15. Leonard Goldstein
    Many thanks for all the comments - but I agree to @Boulderer: it doesn't make sense to send a C-model to ideas. And additionally I don't want to make money with Lego. This is a hobby. It is great fun as long as you don't take it to serious. Anyhow taxes in Germany are that stupid high - it is better to stop working once your income fits your needs (and better use your time to play Lego ). Regards Leonard Goldstein
  16. Leonard Goldstein
    Hi @BrickbyBrickTechnic, glad to hear that It looks very interesting - I am looking forward to your progress Regards Leonard Goldstein
  17. Leonard Goldstein
    Hi Nebulaire, good to know - this is a motivation The LDD-file is growing. I will have to do some final checks when I am back home. First part of the LDD is set to be published in the second week of 2018. Regards Leonard Goldstein
  18. Leonard Goldstein
    Hi Anto, very nice Extra points for the first pic with smoke and skid marks Regards Leonard Goldstein
  19. Leonard Goldstein
    Hi Josephiah, thanks for that The LDD-File is in the works - stay tuned
  20. Leonard Goldstein
    Hi kbalage, this is genius ... Santa Claus playing electric guitar - can't stop laughing ... Merry Christmas!! Edit: How did you manage to make a moose out of the bulldog? Very nice detail
  21. Leonard Goldstein
    Hi efferman, you're the best! It's absolutely incredible how fast you made this LDD In the mean time the trailer of my luffing crane is done:
  22. Leonard Goldstein
    Hi Lok24, this is really a great thing - and brings mindstorms on my wish list It sure will be a highlight on the exhibition. And I like your claw mechanism (the one of my luffing crane works in an almost similar way). Regards Leonard Goldstein
  23. Leonard Goldstein
    Many thanks in advance for this work (and for your previous posts of course)! Can't wait to get the Mack
  24. Leonard Goldstein
    Hi efferman, many thanks for publishing the LDD-file of the Mack! Will there be a file of the complete tractor unit? It would be a great add-on for the file of my luffing crane. Luckily my trailer does fit to the fifth wheel Regards Leonard Goldstein
  25. Leonard Goldstein
    Hi LegoFan117, many thanks for the kudos In the mean time a solved some problems with the LDD-file, so it is taking shape (but will need a lot more time to get finished ...) I promise to publish the LDD sometime in January. If anybody would like to copy this MOC, you can start disassembling your BWE Bye Leonard Goldstein
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