Jim Posted October 5, 2013 Author Posted October 5, 2013 Illegal techniques, are techniques which won't be used by official TLG builders. Techniques where you need to bend parts, put too much stress on parts or where parts won't fit properly. Stuff like that. I'm sure other people can give more examples. Quote
legolijntje Posted October 5, 2013 Posted October 5, 2013 I noticed some people on EB have been talking about 'illegal and legal techniques'. What is meant by this? Could anyone give me some examples? Thanks in advance. :) Yep as Jim says. There is also a powerpoint on the LEGO site about illegal and legal connections. Although it's not all Technic related and a bit outdated, it's still a interesting read: http://cache.lego.com/downloads/brickfest2006/brickstress.ppt Quote
Jim Posted October 5, 2013 Author Posted October 5, 2013 There is also a powerpoint on the LEGO site about illegal and legal connections. Although it's not all Technic related and a bit outdated, it's still a interesting read: Quote
Lipko Posted October 5, 2013 Posted October 5, 2013 Yep as Jim says. There is also a powerpoint on the LEGO site about illegal and legal connections. Although it's not all Technic related and a bit outdated, it's still a interesting read: http://cache.lego.co...brickstress.ppt I guess this means that there is no official statement about legal/illegal connections in Technic. Many people say that being able to create the connection in LDD means the connection is legal, but you can abuse the fact that "clicking/snapping", collision detection and the visual representation of the model in LDD are separate things. This means you can make connections where the holes are not perfectly overlapped or there are minor collision between the parts. Quote
jantjeuh Posted October 5, 2013 Posted October 5, 2013 I think techniques where it's hard or even impossible to take apart parts again are also considered 'illegal'. 42000 uses some of these. Quote
phool Posted October 5, 2013 Posted October 5, 2013 (edited) Edit: My query was not necessarily within the guidelines of the forums so I have edited it out. Edited October 5, 2013 by phool Quote
Rick Posted October 5, 2013 Posted October 5, 2013 Apologies if this is against forums rules or etiquette but I'm curious to know why DLuders was banned? There's a topic discussing our policy on (not) talking about why users were banned here. Quote
jantjeuh Posted October 5, 2013 Posted October 5, 2013 I understand why he was banned, but he always brought a lot of unnoticed MOCs to the limelight and was generally really helpful. Real shame. Quote
phool Posted October 5, 2013 Posted October 5, 2013 Thanks for the clarification. I understand why such a policy would be in place. If required please delete/edit out my post above to avoid any further unnecessary discussion on the topic. Quote
MrNumbskull13 Posted October 5, 2013 Posted October 5, 2013 Thanks for answering my question everyone! That PowerPoint was quite a complicated but interesting read. :P Quote
Junpei Posted October 13, 2013 Posted October 13, 2013 Sorry to revive such an old topic, but... Has anyone ever done a zero steer crawler? I think I might try one as my first Technic MOC. Quote
Jim Posted October 14, 2013 Author Posted October 14, 2013 By old topic you mean the General Discussion topic? This topic is meant to be revived, so no harm done. Quote
weavil Posted October 14, 2013 Posted October 14, 2013 The only thing incandescent think of is the Jeep Hurricane someone did some time ago. But it wasn't setup to be a crawler. I don't know how hard it would be to modify that chassis for crawling. It does, however, depend on the tire size and type of suspension. If you use the portal hub it would put the steering pivot further away from the tire and give the most freedom of turning range and tire size. Otherwise you would need a narrower arm going to the wheel/tire. Would like to see a WIP if you do try. Quote
MrNumbskull13 Posted October 14, 2013 Posted October 14, 2013 Cool idea but... 1. I don't think you could make a strong enough set up for it to be a crawler (I don't mean you, I mean anyone lol) 2. The only zero steer vehicles I've seen had independent or no suspension. Crawlers mostly use live axles. 3. I like conventional steering for driving my crawlers, sometimes you only have to rotate the front wheels a bit to get up an obstacle or out a ditch, zero steer might not work in these situations. Sorry for being so negative, but if you go ahead with it I'd love to see how it goes! Quote
Junpei Posted October 14, 2013 Posted October 14, 2013 I know it's set up for independent or no suspension, but I succeeded in making a live axle with independent drive and steering on both wheels. It probably won't be a real crawler tho as it will have 8 driveshafts. I might have pics within the next hour, I'll add them to my post. Quote
Junpei Posted October 14, 2013 Posted October 14, 2013 Here are some pics: The little angled bar is just there because I couldn't find a 2L liftarm. The blue pins will be the shock absorber mounts. If you can't see in the picture, this is demonstrating its zero steer capability, I forgot to take a shot from above. Normal steering. I have to make a BL order of some stuff including u-joints, but you can see the 4 driveshafts, one for each independent function. Sorry for the picture quality. I hope I can integrate a gearbox on top of all of this. Also, I will probably be adding portal axles and new wheels in my BL order. Do 81.6 x 38R tires fit on portal axles? I doubt it... Quote
MrNumbskull13 Posted October 15, 2013 Posted October 15, 2013 Hey that looks pretty good! I'm pretty sure those tires do fit tho, I always use them (they're the biggest ones I have) and they fit on custom portal hubs. Quote
Junpei Posted October 15, 2013 Posted October 15, 2013 Thanks! I was talking about Unimog portal axles, I think it only fits 9398-size wheels and power puller wheels. Quote
JTS Posted October 15, 2013 Posted October 15, 2013 Yep as Jim says. There is also a powerpoint on the LEGO site about illegal and legal connections. Although it's not all Technic related and a bit outdated, it's still a interesting read: http://cache.lego.co...brickstress.ppt I find this part fascinating: "Approved angles are in multiples of 22.5 degrees. Some LEGO projects require an engineer to determine whether an angle is legal." I imagine most of the jobs at LEGO to be bizarre and dreamlike, but someone going around with a protractor measuring multiples of 22.5 degrees, only to dash the dreams of the master builder who offers out their prototype that they have lovingly spent the last month lovingly crafting. I cannot help but smirk.. Quote
Junpei Posted October 15, 2013 Posted October 15, 2013 That is kind of funny, I'm surprised tho that they need an engineer. The clicky hinges 'click' in angles in multiples of 22.5 degrees... On the subject of my crawler, do you guys think I should start a WIP topic? I'm afraid it might just be waiting for BL orders. Quote
Jim Posted October 17, 2013 Author Posted October 17, 2013 If you have made some progress already, why not! Quote
Technyk32231 Posted October 20, 2013 Posted October 20, 2013 So, people think the portal hubs have bad steering geometry? That's nothing compared to this. Don't worry, it wasn't me who made this. Quote
Junpei Posted October 20, 2013 Posted October 20, 2013 What's wrong with it? I can't see too clearly in the picture. Quote
Technyk32231 Posted October 20, 2013 Posted October 20, 2013 What's wrong with it? I can't see too clearly in the picture. See those black connectors sticking out from the red chassis near the front wheels? Quote
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