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About Hanso

  • Birthday 09/27/1966

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  1. Thanks ColletArrow. My colleague is rebuilding the part to separate the candies from the containers. I have seen the first version, and it is looking great. Sorry, no pictures yet. Thanks bombcar. It wasn't too difficult to find a way to push all the bars simultaneously, but I had to think twice to find a way to push it in a supple cuve. Suddenly, I had this Euroka moment. And then it was build in a couple of hours (first a proto, then the final build).
  2. The Delivery Station unloads the train, separates the candies from the containers and delivers the candies to the visitors. The 2017 consisted of four parts: Push mechanism: pushes the containers-with-candies from the train Roller mechanism: rolles the containers-with-candies to the lifts Lift mechanism: lifts the containers to separate the candies from the containers Locker mechanism: candies are stored in lockers, to be opened with the ticket reader The order of the candies needed to be kept, so every visitor received the candy in the color he requested. You can watch the 2017 here (starts at timestamp 2m39s): For 2018, we keep the Push mechanism and the lockers. The part that will take care of separating the candies from the containers, is completely redesigned. The push mechanism however, was rather slow and - as you can see in the video - it needed quite some space due to the slider. So, that needed a redesign as well. You can see the new version here (click on the photo to go to our Flickr page): And of course a video: Enjoy, Hans
  3. Uploaded a new video to demonstrate the work in progress. In the video, two containers are stored in the warehouse. Not only to see if it works, but also to measure the time needed. The loading platform is at the right of the warehouse. The first container is stored at the nearest position to the loading platform (= bottom, right). The second container is stored at the most far position from the loading platform (= top, left). Storing the two containers is less than 75 seconds which is perfectly acceptable. Still waiting for more bricks to arrive to continue building ...
  4. Improved version of the motorized Wheel of Fortune. In the previous version, the motor power was transferred through the axle of the wheel. The wheel is rather heavy, so the torque on the axle was also rather high. In this version, the motor power is transferred to the wheel using the yellow gear rack elements (6151167). Click on the picture below to view the pictures on Flickr: And of course a video: Enjoy watching, Hans
  5. As promised more detail of the improvements. Horizontal movement of the stacker crane In the previous version of the stacker crane, the motor that was responsible for the movement, was build on top of the crane. Resulting in a very long axle going through the left tower to the bottom of the crane. In the current version, the motor is build-in into the left tower. This results in a almost direct coupling to the corresponding gears, and that results in a smooth movement. See the photo below. Horizontal stop locations for the stacker crane The stacker crane needs to stop exactly in front of a container storage. If not, the gears will not connect which results in the container not stored or retrieved correctly. Because of the distance, counting the number of rotations will probably not be accurate enough. In the previous version, the gear racks for the horizontal movement were placed in the middle. In the current version, I moved them to the two sides. I didn't have to move the gears in the stacker crane, so this was a relatively easy change. Having now room 'in the middle', just like the motor that was build-in into the tower, I now build-in a touch sensor into the tower. An axle with a Technic Ball Joint (32474) at the end, makes sure that the axle glides smoothly along the flat tiles. A stop is made by two slopes (85984), the axle with ball joint lowers and the touch sensor goes to 'released' state. Horizontal platform movement In the previous version, the motor responsible for the horizontal movement of the platform, was attached to the slider of the right tower. In principle, this worked fine. However, it has two disavantages: 1) The weight of the sliders and 2) The motor needed a cable carrier. Because the platform also has a motor build-in for the platform rollers and a color sensor for the positioning, the platform would need three cable carriers in total. It might be possible to use one cable carrier for two cables, but definitely not for three. I moved the motor that is responsible for the horizontal movement of the platform, to the top of the stacker crane. A long axle in combination with a worm gear, is used to transfer the rotation to the platform. The worm gear can slide smoothly along the long axle, in the picture below you see how the motor rotation is transferred to the platform, keeping the vertical movement in tact.
  6. I uploaded a new video of the redesigned stacker crane that is part of the Candy Warehouse: Some parts are still missing (in backorder), so some bricks are not in the right color (like the yellow liftarm in the base of the crane). Updated: Horizontal movement of the crane has been improved (much smoother now). Major change: motor is now inside the left tower. 'Stops' added to determine the horizontal location of the crane. Motor responsible for horizontal platform movement is now fixed to the top (you can see it at the top of the right tower) I will add some more detailed information about the improvements later this week. Enjoy, Hans Enjoy
  7. Another thing: the final version of the Warehouse will have two stacker cranes. One crane will be storing the candy containers arriving from the Automatic Candy Sorter, the other crane will retrieve container to send it to the delta crane. That means that every storage compartment needs to be accessed from two sides. I made a proof of concept to check if the container can be stored from one side and retrieved from the other side: And hooray, it works! In the next period, I will need to work on one stacker crane. When it is working, I will clone the crane and extend the warehouse. Enjoy, Hans
  8. Thanks, ColletArrow. And you were right, I found a way for the gear reduction. I also had to make a bit more room where the EV3 cable was connected. Enjoy, Hans
  9. I started redesigning the Candy Container Warehouse. First step: improve the horizontal movement. Will upload pictures of the work in progress. Below you find the motor that is controlling the horizontal movement, now being built in into one of the towers. As you can see, there is no gear reduction yet. Need to figure that out in the small space ... Enjoy, Hans
  10. And a picture of the complete setup (click on the picture for more photos): The result of the Candy Sorter (on the bottom right of the picture) is a container with a Fruitella candy in it. The container-with-candy will then be moved to the Candy Warehouse. Next step is continue building the warehouse, you read more about it here: Enjoy, Hans
  11. Thanks Aventador2004. Thank Techniccrack. Yes, it is in Utrecht. You can view some of the past layouts at Youtube.
  12. I was looking for compliments in my mailbox, and now I got one. Thanks. Best, Hans
  13. No replies at all ... is it that bad?
  14. Finished the build completely. Photo's can be found on Flickr (click on the picture below): One of the major updates in this final version, is the end of the conveyor belt. When a candy needs to return to the storage, sometimes the candy kept on rotating on the two belts. By adding an extra sprocket (57520), the conveyor belt is lifted a bit. And it makes the belt a bit more wobbly. That results in a candy ending up on the returning belt with more certainty. This is shown at the end of the video (starts at timestamp 2:00): Enjoy, Hans
  15. *** IMPORTANT UPDATE *** In my last writing of two months ago, you have seen the complete and working candy sorter. But when finalizing the details and discussing the software interface with the team, I needed to solve two more issues: When the dispense unit (on the left) dispenses a candy to the conveyor belt, it takes a couple of seconds before the candy reaches the color check unit. At this moment, the dispense unit stops rotating. Although there was little chance to happen, but in those few seconds a next candy could have been released. Meaning that the trebuchet might end with more than one candy. So, issue #1: how to ensure that only one candy would end up in the trebuchet. And although not really a big problem, how to ensure that a candy will end up in the trebuchet. Sometimes, it could take 'ages' before a next candy was released. Another issue is that a candy color needed to be rejected. The reason is that the containers-with-candy are stored in the warehouse (not in this picture). The warehouse can store 6, maybe 12 containers per color. But when the warehouse is full of, let's say red candies, the color sorter will get the message 'do not send me containers with red candies'. So, after the color check unit, it should be possible to return the candy to the candy dispense unit again. Or at least, remove it from the belt. Issue #1: Find a solution to dispense one candy at a time I have looked at many Youtube videos to get inspiration how to ensure 'one candy at a time'. How is it done in the real world? I ended up with 'bowl feeders', 'singulation conveyors' and many more ingeneous types of solutions. But nothing that helped me. Another inspiration was (of course) the Lego GBC builds. There are many solutions for feeding the balls one by the time. But the square shape of the candies make all of the Lego GBC solutions not an option for our situation. The following Youtube video that I saw, stayed somehow in my mind: I don't know when, I don't know how, but suddenly I had this "EUREKA" moment. You can see in the proof-of-concept that I re-used the idea of the two belts rotating in opposite drections. Using a slide with an opening at a angle, so that only one candy can pass and other candies will be moved to the other belt when the door closes, is my own invention ("the eureka moment"). So, hooray, the concept works! Interesting detail: You would expect that the ultrasonic sensor is the best way to detect if a candy has passed the gate. No, that doesn't work at all. The distance is too small to detect a candy and you end up in all kind of false readings. The color sensor however, as you can see in the video, works perfect when you use reflection mode. After the proof of concept, I build a better one with a faster sliding mechanism and with the color detection unit included. Issue #2: Returning a specific color to the candy storage Coincidentally, the solution of the first issue gave me immediately also a solution for the second issue. By using a two step 'pass-through' with the color detection unit in the middle, it would be simple to return a 'wrong' color. At the end of conveyor belt 1, the trebuchet would be connected. The other conveyor belt that is used in the circular candy section, can be extended and then act as the 'returning belt' (see picture below). I just needed to add a second 'door' to be able to pass the candy to the trebuchet or to move it to the returning conveyor belt. And of course a video to show how it works. Please let me know what you think of it. Enjoy, Hans