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 Robotics / 13420
  Axle joiner angles
 
I was looking at the axle joiner thingies that let you connect two axles at an angle. The angles Lego have chosen to supply seem incredibly non-useful (apart from the obvious 180 and 90 degree ones). Each part also has a number on it. Here is a (...) (24 years ago, 10-Dec-00, to lugnet.robotics)
 
  Re: Axle joiner angles
 
I suspect the crux of your answer lies in the 3-4-5 triangle. [NOT! read on to see why this isn't true!] The complements of 112.5 and 157.5 degrees are 67.5 and 22.5 degrees. The sum of 67.5 and 22.5 is 90 degrees. Add add a 90 degree angle and you (...) (24 years ago, 11-Dec-00, to lugnet.robotics)
 
  Re: Axle joiner angles
 
I think these just correspond to the splines on the old connectors which they replace. I haven't checked it, but I think the splines are every 12.5 degrees. The connectors are too chunky to make accute angles, so they only do the obtuse angles: 0.0 (...) (24 years ago, 12-Dec-00, to lugnet.robotics)
 
  Re: Axle joiner angles
 
Oops. It looks like in your list you exchanged the labels of #3 and #5. And it occurs to me that the splines had to be set so that the half bushings could be pushed together and lock when on the same axle. I would have to take a look to see if that (...) (24 years ago, 12-Dec-00, to lugnet.robotics, lugnet.technic)
 
  Re: Axle joiner angles
 
(...) Yes. (...) No. There are 16 splines, and the axle joiners come in increments of 360/16=22.5 degrees. (...) If you mean the single angle beam ((URL) angle is related to a 3/4/5 triangle, so that the longer side becomes the 5-side of the (...) (24 years ago, 13-Dec-00, to lugnet.robotics, lugnet.technic)

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