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Nov
8
comment Why did Technic bricks have holes in the studs?
I tried stuff with the beams and changed my super bad answer for this one
Nov
4
comment Why aren't LEGO bricks cubic?
In the same line: Why is a plate 1/3 of the brick's height?
Nov
4
comment Has anyone automated the LEGO hand sorting process beyond “pawing & piling”?
@MajorStackings The hard part is not the output mechanism. Recognizing the bricks is everything and this system is amazing at that (even using computer vision). Once that's done, optimizing the speed can be done several ways and on several components (software, mechanical, structural). One simple way to augment the speed would be to put many similar detectors in parallel but connected to the same input and output systems.
Nov
3
comment Has anyone automated the LEGO hand sorting process beyond “pawing & piling”?
@MajorStakings How is this not helpful? The only difference with what you want is the output sorter (shoots instead of buckets)
Nov
2
comment Can I remotly control the points on PF train tracks?
@Kramii There goes my Arduino answer...
Nov
2
comment Is there a logic to the way The LEGO Group fills the plastic bags?
poka-yoke is not only for manual jobs but for automated systems (as stated in the page I linked to). I'll remove my last sentence since it assumes that Lego as some manual packaging. The rest is good I would be really surprised if they were not using an existing method like poka-yoke.
Nov
2
comment What are some 3rd party mini-figure gun makers that distribute in Canada?
Please do a simple research before asking a question.
Nov
2
comment What is the difference between the NXT and the RCX?
RCX also had third party sensors (sonic range finders, IR range finders, ...). I'll try to find a reference (...it was ten years ago)
Nov
1
comment What is the difference between the NXT and the RCX?
@daviesgeek I don't know anything about NXT. This is why I didn't add this as an answer but it would prefer to add it to this answer (I will edit it, since it's a CW)
Nov
1
comment What is the difference between the NXT and the RCX?
Two things: 1) RCX can also use pins, but as only 4 connection points. 2)You can use more than the graphical programming with RCX. You can use NQC (C like programming) or straight C code (if I remember correctly, by using a third party library)
Oct
31
comment Bridge from just basic bricks?
To prevent the stack-of-plate loophole, most Lego bridge contest now have a weight limit.
Oct
31
comment How to minimise or remove sun-stains/fading from blocks?
I wonder how the plastic reacts with this solution. Some products get into the plastic, reacts with it and can make it more brittle. I would be careful before using anything else than natural soap and water.
Oct
31
comment How can I identify kits from a box of parts?
This previous question raises the problem of identifying kits from list of parts bricks.stackexchange.com/questions/102/…
Oct
31
comment How much weight can a handle of Technic pegs and beams support?
After calculating it, I pictured my kid spinning like the Tasmanian Devil at 252rpm. I was laughing so hard I had a though time typing the edit.
Oct
30
comment How strong are blocks in general - is adhesive necessary when building large structures?
Gluing Lego should be a crime :)
Oct
29
comment How would you make a good pivot-arm suspension?
I'm not sure I understand your design. Would this behave like a rocker-bogie suspension? (like the MER rovers). I don't see which gears are really connecting. Can you clarify the sketch?
Oct
29
comment How would you make a good pivot-arm suspension?
I was thinking along the lines of a Slewing Bearing. I've seen designs like that used for massive Lego tower cranes. This gives me an idea [off to the Lego boxes]...
Oct
29
comment How would you make a good pivot-arm suspension?
This was my first option but it would have snapped under the weight of the two sides. I've added a picture of the wheel size that I'm using. Imagine that plus a motors and gears on each side plus the structure. The single axle design would not survive (unless it supplemented with some other support).
Oct
29
comment How would you make a good pivot-arm suspension?
@Joubarc I tried two different Lego turntables with the same results. To be sure, I'll look into the part like you're suggesting. Still, I think that there was way to much torsion (perpendicular to the turntable plane) applied to it and this is why I'm asking around for other design ideas (before I do this with non-Lego parts).
Oct
29
comment What are the best options for building a LEGO RC car?
Here's one I made last year. (phillipecantin.blogspot.com/2011/10/lego-rc-car.html)