Mr Jos

Nice machine and video! A good demonstration what can be done with pneumatics (vacuüm). But I have a question, as with many Robot Inventor machines I've seen; The motors look like they pause few 100ms after finishing the movement, and then start the next motor. Did you actually program a wait block after each movement, or is it RI being slow? To me it looks like the RI motors react much slower than the EV3 for doing quick tasks one after another.

And it's finished (3D), On my flickr are a few more photo's, with pallets and a more closeup from the XL robotarm. Now it's just making instructions.. Starting at page 1/1157, wondering howmany pages I will have when finished. I hope under 300-400. Edit: 3/06/2022 - At page 100/1095, as the build is with so much big parts, I can't combine many steps on 1 page.. 6/06/2022 - At page 182/978 (step 298). Racks + crane are completed. Working on the corner transfers now. 11/06/2022 - At page 265/859 (step 461). All roll conveyors finished and the control center, scissor lift. Next is the 2 chain conveyors. 11/06/2022 - At page 304/789 (step 552). Short chain conveyor finished. 11/06/2022 - At page 356/707 (step 686). Everything except the 6DoF robot is finished in instructions. 12/06/2022 - At page 476/591 (step 901). 3 joints left on the robot arm.

After 3 days the complete warehouse (racks/crane/cross supports/rails/baseplates/chain conveyors/corner conveyors/roll conveyors/scissor table/control panel) is in 3D finished [No 6DoF robot arm yet]. 7157 parts, I did think there would've been more, but there's loads of huge parts. 128x 11L liftarm 135x 13L liftarm 247x 15L liftarm!! 140x technic brick 10L 869x chain link small I left out the rack beginning and middle to have some view. The designing of the 6DoF XL robot will be much harder as I will need to take it apart way more whilst doing so. Getting close to being able to rebuild the setup for cleaning/repairing. Edit: A few hours later; ... Baseframe, joint 1 (XXL turntable), joint 2 (heaviest load) and joint 3 are designed, and in buildable order. [8072 parts now, so at 915 for the 6axis-robot so far] The last 3 joints are allready separated in 'blocks' to easily design+combine them. From right to left; 3-motors hub, arm extension, gearbox for gear-skip-free going through the turntable, wrist.

Thanks! Indeed not easy to design anything with half beam onto axles, as they do not snap in place, need to correct the XYZ constantly to keep everything in line. This did slow me down a bit with the cable guidings for the crane, but I managed to get it finished. 4797 parts so far without cables/cord as they can not be put in with Stud.Io . Not to bad for 1day of work, but my 10+ year old laptop is not liking this piece count already. Next part will now be the roller conveyors, then the chain conveyors followed by the scissor table. It all takes a good thinking in what order everything needs to be put in place so it's possible to remake this. Edit: Due to getting used to Studio + having my palette nearly completed with all parts I use (and how to find them fast), I got the corner transfer (rolls) nearly finished. I'm meanwhile updating the lifting mechanism, as that's what broke 3 times at the show. I do will have to buy 2x 16L axles though to make it in real, as this whole mechanism is so cramped together, modelling the chain was a bit of a pain as it turns everywhere and starts snapping in a complete fixed position, and there's little room to play around.

The logistics center has been running 15hours last weekend at a 2-day event. During build-up few minor adjustments needed to be made to homing positions as the flatness of the table impacts the position of all components. Once it was running I had only 3 breakdowns in the first 2hours (all the same, lifting the input roll conveyor up crashed the chain coming from its motor). After changing a software parameter and changing a 4L axle with a 6L axle it worked 13hours without any major breakdowns. It did suffer some heavy friction, from turning the sliding parts into Lego dust, during the last hour. And it did start to have trouble to position accurately. I want to open all heavily worn items and clean/change them, but as there is no instruction to rebuild yet, I have started now to make a full 3D of this MOC. After 3 hours I now have finished designing the 5racks, 6floors rack + correct build order, so it's easy to extract a PDF file from it.

Thanks, that was what I was looking for, went in my 20yr old studded bins and found all the needed pieces. They work as intended and not fragile. I also finished the programming for all the conveyors and robot arm to stop directly when the e-stop is pressed. And restart on reset and continue to their original endpoint. Only the high bay crane still finishes its moves for now as it's a bit harder to program a soft-stop on e-stop. I can't slam the brakes or it will want to fall over/stress the rope. Also when homing the fork I'm looking for colors, so not a good point to stop midway. Will be thinking on how to program that..

Thanks! I wanted the buttons sturdier, but didn't find a way to do so yet, and still have them round and in the correct colors (red with yellow plate / blue). The buttons themself are firm, but the gray plate underneath isn't. For now I prefer public handling the 2 input signals touchless, and emergency stop only in case of emergency. As the program in very rare cases crashes when the button is pressed. I imagine it will happen if it's pressed every minute. Still need to finetune the program for the e-stop. (At this moment trying to make all motors stop directly and not finish their movement). Each EV3 uses max 7W for charging, so 49W+1W for the LED. Together with my laptop in case of real programming problems, it shouldn't be to much (I hope). No such thing as stupid questions. The white EV3 cables are indeed custom build by me. - The cable is; flat, 6wire phonecable. Last time I bought 30meter for 0,44€/meter [cable] - The plugs are: !!Right side tab!! RJ12 6P6C for EV3. Last time I bought 100pcs on ali, for €23,67 incl shipping, so 2plugs/cable = 0,47€/cable [plugs] - Another need is the crimping/stripping tool, I bought a cheap modified 6P6C (to be able to handle right side tabs) on ali aswell (can be used forever). I think it was under €20. So a 1meter cable [double Lego maximum length] costs under 1€ custom made. Depending on howmany you will make, else the price for the crimping tool makes it higher. But the fun is that you can make the cables exactly the length you need, or some extra long 2meter cables to test some fun projects. I did make a video some time ago on how to make them. It takes less than 1 minute to make.

Lamp above the Interface computers is installed, and allows for a good reading now. Just the screen is scratched, but I'll change it with an EV3 without scratches after the event. I hope the Bluetooth connection between the 5x EV3 bricks will work fine at the showing.

No, with no EV3 connected, the LED's still light up slightly (around 7V DC), with the switch on the LED's in Off position. Switch on they burn fully (at 12,2V DC measured). But I'm already happy I can charge all my Mindstorms sets with just 1 adapter now. And put some lighting on the 2 screens that have the machine interface. After the event next week is finished I maybe will try to change the setup and maybe rewrite the programs to a more clean one. And add some filling/emptying stations for the pallets.

After some soldering, I now have 1x 230V AC wall plug, able to charge 7x EV3 batteries at the same time + a LED strip to illuminate the HMI screens. Each charging cable is 2meter long, so easy to nicely go to each brick and hide the cables as much as possible. Only strange thing is the LED strip does not fully turn off. With the switch in off position there remains 7V DC, even with the 230V AC plug without power.

Now I'm running 6 Lego chargers (10V 700mAh each) to charge the 7 rechargeable Lego Lipo battery's I have, for my 8 EV3 bricks. As they cost 30€ each and they get harder to find + they use many wall plugs, I was already thinking a long time to make a 'charging station'. I bought this 230V AC -> 12V DC (5A) power adapter, and 20 charging plugs for the price of 1 Lego charger. As the original uses 10V/700mAh I should be able to power atleast 7 batteries (7x700mAh = 4.9A). The plan is first just 5 for this Logistic center (1x crane, 2x conveyors, 2x robot). Rest of the machinery still with Lego chargers. Anyone seeing any problems with this setup? I still need to find where I put my connectors years ago, and buy some cable.

I started preparing the Logistics center for an event. Final cleaning will be done just before the event as there is loads of dust in the air here. Maybe will create a few more explanation signs. It will be interactive with the 2 'Manual' sensors to request pallet movement, and have an e-stop+reset.

I already know this will be a topic I will be following closely, and await updates from! You could use the inner 60T turntable to steer the wheel, and the banana gear racks as a bearing only, to allow smooth turning. When both are connected I think it should work pretty good. You just will need to put very good cross bracing everywhere to support the high weight + torques for moving.

Great illustration movie and machine. About the gears I also wanted to remark that you now use 8T 4 times in a row followed by a 40T. This gives more backlash than using 8T-24T-40T. You should be able to easily swap out those 3 middle 8T by a single 24T. It will remain at the same 5:1 gearing and rotation direction. For the multiple direction movements followed after another, you will need to program some Kinematics indeed. Make it calculate the desired speed for every motor with a certain amount of angle to move, to end at the same time. To get this moving forwards and backwards with a motor in 1 move (to go in a line or something) you will need to have a positioning system (XYZ) and use Forward Kinematics (FK) to calculate the current position. And then Inverse Kinematics (IK) to calculate the next coördinates for each motor. Then constantly blast the motor angle + speed to each motor. This is what happens in my 6axis robot aswell, to have it move straight lines. It will need to lean backwards, and return forward, with me only giving 1 set of XYZ coördinates. It will not be super simple to program, but as it's only 3 axis it should be ok to do with some thinking work.

Yay, for freeing up space and have less pinned topics that are rarely used more than once. But it should be easy accessible from like a pinned topic-link to the subforum. It will be more organized and still get much views I think, and the other MOC's made during contests will get their attention as well, instead of having to think to post directly or wait till after the contest is finished.

Don't think there will be more (any) response here in this thread compared to the same in Technic, So that's a full yes from me! A year ago when I posted my 6DoF projects here there was a little response, but now it's going sub-zero. Mainly the reason I posted some finished projects directly in Technic (illegally before) to atleast have some response.

I'm big in favor to move mindstorms here. In the past I have posted some of my mindstorms projects here (illegal) and got some response. Now my last project in the mindstorms subforum has been like a monologue. I think it would have got more activity if I did post it in Technic, even if it got put to page 2 fast. My update would've put it back on 1 after a few days anyway.

Done

Unusual or not, if it gets used it should be allowed in my opinion, if there is some proof a machine is used at a construction site and it's heavy machinery. And this one is proven now with that FB post.

Normally they are used upside down, then they can be used to pick items from a moving conveyor belt, and for example place them in cardboard boxes. Or just for turning pieces in the correct direction. In real life they move really fast.

Really cool model! It has a nice speed already. And these pneumatic cylinders are always hard to mount somewhere indeed.

You can upload your photos to Flickr, and then post them here.

It's what I drive at constructions sites. Along with telehandlers, scissor lifts, reach stackers, boom lifts. So yes that's all construction equipment. Most people just think about big, huge dump trucks etc, but there is so much more that is used in construction. Even some kind of flatbed truck could be, as we use that to transport equipment from overseas containers to the installation zone for the parts. We use the forklift/crane to take out those parts and load/unload the truck. Install it with telehandlers/cranes/forklifts and use scissor lifts/boom lifts to screw in all bolts in place at height. Edit: Added a random video from youtube with some equipment that people might not have thought would be construction equipment.

I searched on google for "EV3 classroom daisy chain", and I found this helpfull PDF, it shows how to do what you want. Heave a read and try it. https://ev3lessons.com/en/ProgrammingLessons/advanced/scratch-DaisyChain.pdf

I had an idea, for an equipment I already want to make for a long time. A freestyle version of my alternate. But I just measured it and it's 15 W x 20 H x 47 L with just 2 liftarms making it that long to 47 (14100 cube studs). Without them it would be 15x20x33 = 9900 cube studs. My plan was to make a slightly larger version if I did a freestyle, but seems I will need to make it the same size as it will just fit if I implement some hinges. @Jim would it be allowed to make a new MOC, but same size as an already posted MOC, same kind of machine? As it just fits the cubes with folded forkboard, it would be nearly same scale the new one. Else I would need to think what I'm going to make, atleast it will be something I operate myselve like this forklift.