LEGO Technic Braiding Machine
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- Опубліковано 11 вер 2015
- This model is my LEGO Technic Braiding Machine which debuted at the 2015 Brickworld LEGO Expo in Chicago (June 17 - 21, 2015).
There are three bobbins of thread that travel in a figure eight (8) pattern, causing the threads to intertwine and create a braid. A spool then collects and slowly winds up the braid.
At Brickworld, once the collection spool was full, I cut the braids into lengths about 20cm (8 inches) long and handed them out to kids as friendship bracelets.
This model was well received, and was nominated in the 'Best Mechanical' division.
The toughest part of building this model was getting the timing of each mechanism just right. To keep everything in sync, only a single M-Motor is used.
The other challenge that I faced was keeping it running for extended periods of time. All of the moving parts of the model would slowly work themselves apart, and the worm gears wanted to force the model apart any time one of the bobbins jammed.
I do not have instructions, nor do I know how many pieces it took to make. Please don't ask. - Наука та технологія
that is amazing, can't think of much more to say than this
Absolutely amazing
WOW! _ I had to watch it 2x to get an understanding for what's happening... Love that switch where the spool moves over! Great Job Mate :)
Outstanding work! Makes me a bit jealous though :D
Cool.
A good addition to this would be to make the receiving spindle move back and forth to distribute the braided material evenly =)
super
Tutorial please
Unfortunately I don't have any detailed instructions or tutorial on how to make this model. If you have any specific questions I might be able to help, but I made this model several years ago so I don't remember most of the details.
Please tell me how to make
Unfortunately I don't have any detailed instructions or tutorial on how to make this model. If you have any specific questions I might be able to help, but I made this model over 7 years ago so I don't remember most of the details.
OK…Thanks
I'm very impressed by the compactness and cleanliness with this MOC! It's very fascinating to watch it in action!
Very clean, finished looking build, indeed.
I must admit: I've reviewed the video hundreds of times, trying to reverse engineer how it's built and capture it in LDD and/or Stud.Io .. ignoring the battery box, motor and cables for now (can't seem to find an equivalent battery box and what appears to be a switch in LDD). BTW: is that a switch on the right side, bottom view? The L-shaped brick in the middle of the cable chain.
I've figured out about 85% of the build, but somehow the spindle worm gear drives appear to be half a brick width off (X axis, bottom view, where they connect to the 64179 Beam Frame) .. Is the Beam Frame itself offset from grid, or is it an optical illusion? It appears that some Technic Half Beams are used to support the vertical gear axles, but my MOC so far doesn't have that gap.
I'll keep tinkering along - but would be happy to send you an electronic copy of the LDD or Stud.Io build when it's done!
+Bruce Headley - Thanks for your comment :-)
To answer some of your questions...
I don't use LDD, so I can't really help you with that at all.
The battery box is part 84599, or you could also use the AAA battery box (part 87513c01).
The L-shaped brick that you are referring to is the IR Receiver (part 58123c01). This isn't 100% necessary, but it does allow me to control the machine remotely. Also, by using the 'Train' Remote (part 64227), I can set a speed and leave it running at that speed without further input.
Yes, the spindles are offset ½ a stud. This is so that the arms of the spindles meet at the correct location in the middle of the machine. As you suspected, there are some ½ width beams/liftarms in there, as well as some ½ width bushes.
It is difficult to show pictures of the drivetrain, but I have created this 360° animation: www.brickshelf.com/gallery/slfroden/BraidingMachineV1/Drivetrain/animated.gif
There was also a brief discussion about this machine on the Eurobricks forrum: www.eurobricks.com/forum/index.php?/forums/topic/114544-braiding-machine/
I have already created an LDraw file of this model. It should be stud.io compatible, but I primarily use MLCad and LDView. They are not instructions per se, but they are enough for me to recreate this model if I wanted to. If you send me an email, I'd be happy to share the file that I have. My email address can be found on my UA-cam About page (ua-cam.com/users/slfrodenabout). Please include your name in the email so that I know that it is you and not spam.
Of course, there are always improvements that can be made, and I do plan to make a new and improved braiding machine at some stage, when life/time allows.
I wonder how fast this thing can go untill the strings will become a mess
+Lev Start - It can go a little bit faster than shown in this video, but the faster it goes, the more unreliable it is. The strings don't become a mess, but the spools don't transfer from side-to-side properly and they jam the mechanism, causing the motor to stall. Since I had this running all weekend at a Lego expo, I wanted it to be as reliable as it could, so I had it running at this speed.
slfroden, The braider would be more reliable if the wind job had a better lay. And you wouldn't need the washers. I assume you hand wound them.
You could build a winder out of Legos. So you can wind the bobbins and achieve a better lay.
+Daniel Wilmot - I did use a Lego motor to wind the bobbins up initially, but I found that as they got used up they had trouble feeding the thread out if the thread was too close to the top, so I wound them with the thread more towards the bottom, which worked better. As the bobbins move to the outside, they pull out a bit of thread, but as they move back to the inside the thread loses tension - the washers help to maintain the tension.
slfroden yes you would get those problems with out a tention spring and a carrier break. Just watched the video again and your using the bobbins as your carrier. But still this is a cool 3 carrier braider out of Legos. Keep building.
+Daniel Wilmot - Thanks :-)
We want to buy this machine from you??
Thanks for your interest in my Braiding Machine. Unfortunately this LEGO model isn't for sale. It is just a prototype demonstration model that I have already dismantled a few years ago.
I don't want instructions but can I pplleeaassee have some pics of the underneath, sides, the mecinisim, etc pplleeaassee!
+Baba's custom Lego creations - This is difficult to photograph to show all the moving parts, but I made a quick render of the mechanism for you:
www.brickshelf.com/gallery/slfroden/BraidingMachineV1/Drivetrain/animated.gif
Thanks mate!
now make a knitting machines put them side by sideand create a blanket or something
+Zorca - I have been thinking about making a knitting machine, but I think it will be quite complicated to make with Lego. Also, I have already dismantled this braiding machine, so I wouldn't be able to put them side-by-side.
ah