Mr Jos

Seems the 3L axle connector with bevelled 20T gears work pretty good as a big size reel. The extra length of the 2,5m Lego string makes it a perfect start to have an even surface. A simple remote control was used driving at 20% speed without softstart/slowdown and 100% lifting without softstart/slowdown. With ramping up/down the movements will be much smoother and the crane will not be swinging so much when starting/stopping to drive. Edit: Reel changed from double bevel to single bevel, this even allows to put the string through the axle hole of the 20T, and have it locked with a small knot on the outside of the reel. This gives a very smooth finish after running the extra string on the reel. Next challenge; cablechain for the motor cables to extend and center the telescopic fork.

Next problem to be solved; The string for lifting the basket has to be wind up on some kind of reel. The standard 3x2 reel is to small for reliable winding up the string accurate to calculate the height and have a somewhat constant speed (diameter not changing to much). The inside diameter therefor should be around 2x2 or 3x3 and supersmooth. If anyone has an idea, I'll be glad to test it out. So far failed experiments; Long chain made of '3711' chain links. It stretches to much by added weight making it unpredictable how high you are. + they disconnect under heavy load and crashes the basket downwards. 3L axle connector with some kind of sidewalls added. Hard to attach the string and not pull the string in between the connector and sidewalls.

Thanks, nearly all my MOC's are industrial based. Check out my YT channel to find some of them (I have a playlist made with all my industrial machinery). https://www.youtube.com/user/profjos/videos Lego Technic Perforating Press; Perforates a roll of ticketpaper by decoiling it, and cutting it on desired plate lengths. Based on a steel plate/coil perforating machine. My first version of a High Bay Warehouse. 6 Degrees of Freedom (6DOF) robotic arm. 6 joints working together to do complex tasks like ABB/KUKA/etc robots, not based on 1 of these though. A T-bot gantry system. It was just a quick test to see possibilities with Lego to make quick moving 3 dimensional portals. A sorting device; For technic pins, sorting on color and length of the pin. Not based on a particular real machine, but there are many sorting machines used in the industry. Many more industrial MOC's will come in the future I hope.

1 row of the high bay racks has been made with top and bottom rail in place, and guiding wheels on the stacker crane. It can reach 6 levels of dropoff zones on each side. 1 row is 16studs long exactly making 3 rows fit on 1 baseplate from 48x48studs. This gives a storage capacity of 36boxes per plate. I will have to see when I run out of liftarms/connectors. Studfull 1x10 brick with holes will certainly be gone quick to make the triangle reinforcements. Thanks

A new project has started, Technic warehouse XL: A dual sided warehouse for storing Lego pallets using high bay racks and crane on rails. Objectives: Having a telescopic fork working fast and reliable in both directions. Having a high bay crane allowing precise positioning in 2 directions, driving + up/down. Strong warehouse racks that stay straight from top to bottom and along all rows as there will be only a few mm tolerance for the forks to fit inside. Trying to use as less as possible parts as repetetiveness will eat loads of the same. Cable chains for all long cables on moving parts. In-/Outfeed system to bring pallets to the crane and take them away. Objective 1: I restarted my telescopic fork design trying to make it smaller then my previous version, but I didn't manage to get it smaller. But it did get a bit stronger and a more reliable geartrain is used (no bending axles/gears). Objective 2: The base structure has a directive drive on 1 wheel. Inside is a sensor for resetting the basket heigth and length position. Still point to work on; rolling up the string on a repetitive way. Objective 3: The racks will store 6 palets high probably, need to make a full prototype to test out spacing. Length is adjustable and depends on pieces available. Current testing phase: Objective 4: Basket going up has 1 Medium motor and 1 Color sensor. They both will need a cable longer than the longest available cable from Lego (50cm). Cable holder needs to guide these 2 cables on a reliable way along the mast without being to bulky. Cable for charging the EV3 brick needs a reliable cablechain alongside the rails for long duration demonstration without changing batteries. Real cranes use a "multiconductor system" like from 'Akapp-Stemmann'. This can't be done with Lego, so an "Energy chain" like from 'Igus' will be used in Lego form (same as for basket cables) Testing the energy chains by driving to random positions and back to the front for over an hour. How these long cables are made; Objective 5: For feeding in new pallets, and simultaneous bringing old ones out of the warehouse, a double conveyor system is needed at the entrance of the warehouse. Possible systems are chain conveyors, roller conveyors, combination of those 2 as a corner transfer. Small pallet lift, using a 6DoF robot, pallet stacker, etc. Extra's:

https://antonsmindstorms.com/2021/07/17/how-to-remote-control-your-mindstorms-hub-with-an-android-app-in-python/ Anton's page is a good start to find many things about any Mindstorms (EV3, RI, ...) He has video's/explanation about most hubs how to remote control with phone/ps4 controller.

I found a video of one of my MOC buyers, he added a pneumatic end piece. Hope to see it working soon (or any of the other people that bought the instructions as more people then expected have 2 or more EV3's and like to recreate this)

It's one and the same geartrain I think. Least resistance will start moving (gripper closing, when it's closed it can not move anymore, building pressure in the gears of the arm, and start lifting it. For going down same. First the gears all turn, opening gripper has no resistance, but moving the arm needs little more power( this is reached when the gripper is maximum opened). OP, correct me if wrong.

Great small gripper you made! Might become useful designing anything in need of a small gripping arm.

Project End: The long geartrain is starting to work against me. Spinning the big platform with alternating stationary/rotating arms/benches is giving a high pressure on the 8T gears, up to the 'Osprey' point. It worked good for a bit (no video made) with the automatic pneumatic pump using the gyro sensor for regulating the platform angle constantly and spinning in all directions. But now it's breakdown time, limits have been found. No 3D model/instructions will be made. No idea yet for a next project.

Use a site like https://www.flickr.com/ and upload them there, then post the link here.

Any pictures of some tests yet? Like from suspension/seats/doors or chassis? Very big project you are taking up on.

Nice model also. I'm now finishing my automatic platform angling pump. Problem is that I need a PID to regulate the angle, going up first takes some time to build up pressure. Once it's at 1bar the platform starts to go up. But then when wanting to stop it still goes a little further, so need to stop the pump on time. When going down the valve needs to be opened just a little to have a smooth descend, but same here, when it starts falling, it needs to be closed on time. Fun project again as I like them, some good thinking, designing, building, programming whilst being limited with "it's just plastic bricks".

Seeing the photo from the real blade next to the truck does show 6629 used, but the box photo is really much photshopped as it's nearly 90°, it does not look like 6629 at all. To bad there isn't a new 6x4 L. I could use it very good on some MOC's.

Looks like a new Liftarm 4x6 L-Shape 90° in yellow. Hope it will come in black and LBG fast aswell.

About 42128 MOC's, very popular; Yes. Many 42128 Alternate MOC's (on Rebrickable); Not with pneumatics. Certainly complex builds I don't see happening. You're restricted with hose lengths, amount of T-pieces, and near impossible to draw the hoses in Studio, so certainly not for every designer. They might be able to create a MOC but not (easy) the instructions. The ones seen so far all left out the pneumatics (for one reason or another, the huuuge pump). About my other MOC's, most of them require 500-1000€ of Lego parts, I don't put a high price tag on instructions (max 9,99€), but just enough to earn a bit to be able to tell the wife how I can buy the new parts again. They are all designs with many months work in them for perfecting the programs/3D Model. I then certainly prefer to have buyers that know what they are buying as they pay for it and did research and know how hard it is to make these. Most people buying my 6DOF have already a history trying themselve to make a 6DOF. Those people will have it easyer to understand the working, and what it's supposed to do. People just getting my MOC for free without any knowledge will have a hard time understanding the 100s of lines of code. Same for my pin sorter, depending on your color sensor you might have to adjust the parameters a little bit, but it's also the first MOC I see( instructions being made for) that sorts all Technic pins.

Well done, funny robot to look at how it makes a turn, would it be possible to speed up the walking or are the motors already working on their limit?

Welcome! Many technical builds can be found in the Technic Forum, ranging from standard Lego sets. Their reviews, modifications (MOD). But also there are great alternatives for every set made. Some of the best builds with very creative use of gears, pneumatics, motors can be found in a MOC (My Own Creation). Have a look through that part of the forum (maaany pages to scroll through) and surely you will find some interesting builds for young and old.

I just wanted to add in that sales are hard to get without continuous advertising. But then I just logged in to rebrickable again and saw I sold another 6DoF MOC. I didn't post it anywhere in the last months, 292views this month, but it uses loads of mindstorms items so not for every MOC builder. When I posted the model I expected 1-2sales in like 5years time because of the item list, but nearly not enough fingers to count the sales now. I only would have liked if people who bought my MOC's would leave a comment/review, as this does help potential new buyers. I can see this at the more known sellers, they have many comments with people showing their result, this does help people decide to buy or not in my opinion. This MOC took me over 6months to get working, and still no other people (other then those having bought my instructions that come with the code) have been able to make the same, as the programming is the hardest part here. If I would sell it for the program (time put in) I should ask like 50€, but I sell it complete with instructions for 9,99€. No one I know did make the robot itselve, but everyone just used my programs to learn from it. I even helped a guy on the other side of the world on Messenger for few weeks to modify my program to work with his robot, using robot inventor instead of 2x EV3. Yesterday the alternate to the new set 42128, the first that was on rebrickable also sold, but no people yet with a comment that they did build it. (I did lower the price to 7,99€ few days ago). On a side note, if anyone wants to buy the forklift instructions to try them out, put a review (Just a post in my topic about the forklift is enough, if it's not good you can post aswell!) and comment a finished photo on Rebrickable you can send me a PM (Personal Message) to not spam this post [I will send to first few a 75% reduction code to review]

Why don't you upload your videos to Youtube? Then you can directly link them here and viewable on this page, much easyer, and more people will watch it.

Thanks, the problem with linear actuators is that only the small one is 1 stud wide, and would fit 2 of them on the sides within the small 5 stud wide frame. The pneumatic actuators do allow a nice controlable going up (not on the video), down could also be way better, but this was just a quick video. My idea for smooth going down is adding a 2nd valve on the outlet side, that is in a fixed position restricting the outgoing air., as it goes down with gravity. Thanks, as I have to make calculations about how to make a big turn whilst other equipment stays standing still (all 3 motors need to turn at the exact speeds, but not same speeds), I did write down the geartrain. Big spinning platform: 8 ➡ 8 ➡ 8 , 8 ➡ 8 , 12 ➡ 20 ➡ 12 , 12 ➡ 60. Resulting in a 1:5 ratio (20%) Small spinning platforms: 8 ➡ 8 ➡ 8 , 8 ➡ 8 , 12 ➡ 12 ➡ 24 , 16 ➡ 16 , 12 ➡ 12 (double) , 12 ➡ 20 ➡ 12 (double) , 12 ➡ 28 (double). Resulting in a 3:14 ratio (~21.4286%) Benches: 8 ➡ 8 , 12 ➡ 20 , 20 ➡ 12 (double) , 8 ➡ 8 (double) , 12 ➡ 12 (double) , 16 ➡ 16 (double) , 12 ➡ 20 (quadruple). Resulting in a 3:5 ratio (60%)

After its predecessor small fairground ride, I wanted to reach the real limits of a lifting platform (ride) without being limited to parts to use. I started with making its lifting arm and tried to keep it low profile. EV3 is only used for showing purpose, don't be scared from it, I could use any kind of motors, but I don't have PU motors/controllers! Video of the current state; Independent movements: - Tilting platform 0° to 45°~ with 2x 1x11 pneumatic cylinders and 2x hard springs. - Spinning big arm with 60T large turntable. - Spinning the small turntables at both ends of the arm. - Spinning the benches (with safety guards!) To counteract all 3 motors should turn at a certain speed to keep the people stationary and only spinning the large arm, or end-pieces, without the benches going upside down. This is due to axles going through turntables. The building: The build started with trying to make a low as possible frame with a turntable and 2 movements going through it with good axle guidings everywhere as big torque will go through them as it will be a long gear train. An issue I postponed is the pneumatic cylinders frame, and still it's not 100%. There is an incredible high force trying to pull the baseframe in pieces, that's why we're holding it in the video for now. I started with big turntables at the edges of the spinning arm, but they gave to much friction. So I changed them for small ones. Once I had that I had to design something to make use of the 2 independent axles at the end. I came up with this V1.0 bench, 3 seats per row. After some testing it seemed to long and collided with the superstructure. V1.1 with individual safety guards was made, and tested as good for now. Now the complete top is finished I will go back to try redesign the base platform structure, trying to strengthen it against the pneumatic + hard springs force. - Amount of gears used in this build so far? To much to count. It was fun to design these multiple movements in a 5x3 spinning arm frame, found some new ways to do technic builds in the future.

40: 10 11: 6 4: 4 17: 3 5: 2 22: 1

And a working solution so far, 5 stud wide arm (can't go smaller I think? Support arms are needed for the pivot points next to the axles. Yellow input axle turns the red output gear. Grey input the tan one. Black rotates the turntable. Maximum angle for lifting the arm is 45°, found out in the previous build the universal joints don't like more than that anyway. Whole arm could be much shorter, I added 12L axles with long connectors just for making it longer to have a big workplace for making the top construction.

Thanks, And now a 'small' challenge, as it's to make it as small as possible. - It should stay within the width of a Type 3 turntable preferably and stay as low profile as possible underneath the turntable. - 3 independent movements being 90° on the incoming axles. #1 = Turntable Type 3, #2 and #3 should be coming from under the turntable (fixed chassis) and ending up above the turntable, so it can move something above it. - Bonus points; Have all 3 incoming axles in 1 plane parallel with the turntable (this is needed for a tilting arm, as the 3 axles will need a universal joint right in the turning point of the arm at the bottom). - Jackpot; Having no parts at the opposite side of the input axle (on my photo, right side of turntable should not have anything underneath. (From center to right side as less as possible items) - All gearing has to be strong guided so gears will not skip with some resistance put on the output. This is a pretty Technic challenge, many will not even think about what is underneath/inside a machine. This kind of build could not only be used for a attraction like this, but also on a truck/construction equipment etc... A little help as what I've come up with today so far, 3 Long axles are temporary for building more and checking what length axle will be needed next, these are the inputs being all in the same plane, with 1 stud between them. - Output Turntable, red gear and tan gear all turn independent with the ability to withstand some force applied on them. - Height under turntable 4studs, width 7 studs max. - Length from center turntable to last gears needed 8studs, this could maybe be shorter but the length doesn't matter to me. Finding the Technic limits with Lego, that's what I try to find (and fail many times of course, but I keep trying.