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      Eurobricks Event 2018, Billund Denmark   12/09/17

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Doug72

Eurobricks Knights
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About Doug72

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    Male
  • Location
    South Shields - Tyne & Wear
  • Interests
    Cycling, Railways, Industrial Archaeology

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  • Country
    England
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  1. You ar so right, spent ages trying to get things to working smoothly as intended. Eight buckets now in use. Solution was to increase the rotation speed of the two arm ball lift and as predicted a lot of tweaking and adjustment to speed was required. Now faster running at 3rd step on a speed PF controller.
 Additional bracing added plus measure to ensure balls do not skip out of the buckets. A 2:1 step up gear (24/12) was required to run the two arm stepper unit but this resulted in arms rotating the wrong way, so 1:1 gearing (16/16) was required at the output of the other steeper unit to correct the rotation. The postioning of the two arm lift is achieved by removing the black 12T double bevel gear, move arm to correct position and replace the gear. Photos showing extra gearing required & new video.
  2. Thanks, your observation is correct, at the moment only 4 buckets are loading. I think I have a solution which hopefully will not alter the ball run timings and also not require a ball control gate to load the two arm ball lift. Every time you improve things its been a case of 2 steps forward, 1 step back.
  3. At last after much trial and tribulations have successfully achieved the gaol of replicating the “Perpetual Motion” device which must have had a power input hidden somewhere. My version all driven by one L motor and two stepper units, without any control gates, its all down to timing and fine tuning of various sections along the ball runs. Spent a lot of time chasing lost orange balls around my study !! PS: now to scale it up and use BWE buckets 6145856 ! Heres the video:-
  4. Lego have built a large version of this, 230500 bricks, weight 731 Kgs, Time to build 1660 hours. See Lego facebook page. Note weight shown in video is wrong due to an extra zero !!
  5. After more thought have continued with this build. Gondoliers for transfering balls built and an unloading sytem devised. Top gondoler is shown in the tipping postion. Next build the ball run back to the bucket wheel. Biggest challange will be loading balls into each gondoller and into each bucket on the bucket wheel at the correct moment. Some form of control gate will be needed, activated by trips as they rotate. Update Now built the return ball run and amazingly the balls roll along and drop into each bucket without any control gate !!!! Needs a little bit more tweeking.
  6. See Efferman custom parts recent posting.
  7. Perhaps the Efferman micro motor & mount would be the smallest.
  8. Trying to get the two arm ball lift has proved impossible to get it to function as desired in sync. with bucket wheel as it rotates in 8 steps. After many attempts to progress this build have hit many dead ends and failure. At the moment I can only conclude it is not going to be successful in replicating the "so called" perpetual motion machine. Along the way some usefull mechanisms & ideas were found for possible future GBC builds. Please note I know perpetual motion is impossible, I was attempting to make a powered version, as the original YouTube video must have had a hidden drive.
  9. Loading & unloading steeper unit for ball transfer now built. The rotating arms when they contact with knob gear slow down to transfer balls, then speeds up to next step. Ball loading and unloading gates to now figure out along with ball runs. Note: the black 36T gear is only to hold the rotating arms and is not connected to any other gear.
  10. Update: L motor is strong enough to run both stepper units just need to determine the right gear ratio for the rotating loading arms. Has added bonus that the arm rotation slows down as it engages with the knob gear and then speeds up when it dis-engages to give time for ball transfer for loading and discharging.
  11. Yes, can't double skip now, the 4 lobe knob gear prevents it. Aslo it gives a soft start when bucket wheel starts to rotate to next step. Have tidied up the structure for knob gear drive. Now building a similar unit for the two arm ball lift which only requires two steps per rotation. Hopefully will be able to drive that from the L motor as well.
  12. Stepper Unit Mk 4
 Now perfected a single motor stepper unit. Next stage is to connect to the 2 arm ball lift.
  13. WD40 Is not a lubricant, it’s a water dispersant.
  14. I agree - I tried freeze frame and OK for most of the video but at crucial moments bits cannot be seen, i.e, the trip mechanism to load trolley onto the lift and details of trolley gravity run section. That would be great, re auto reverse unit, it is more compact than a version I previously built for a GBC, so will have a go at building this idea as clear from video the construction. Its the lift section thats not clear how its constructed.
  15. Thanks, will take a look the clock ideas. Happy at the moment with the two motor solution for bucket wheel. Changed the 2L stop pins for 2L pin/ ball, which work much better with the knob gear. Now working on the drive to the two arm ball lift and as I suspected this has added more resistance into the system and slowed the bucket wheel rotation so it does move onto the next step. More trials required for the differential friction system. Also due to gearing backlash in the drive from the BW, the two arm ball lift does not always stop at correct position. So it looks like I will have to build a stepper unit for it but syncronised somehow to the bucket wheel using an output from the M motor.