  |      | Re: Turning a robot 90 degrees Henri Zikken 
  |     |   |    | You could let your robot drop a block of white bricks (like 8x8x8 studs bug) and then let it turn until the light sensor on the other side picks it up. you could use a wire attached to the block to retrieve it into the original position.    (25 years ago, 16-Nov-00, to lugnet.robotics)   
   |    |   |  |    |     |   |     |   |      | Re: Turning a robot 90 degrees Rainer Balzerowski 
  |     |  |    |    | Hi all, we build a synchrodrive (without turntables) that has a freedom of about 100 degree. We used it in an orthogonal labyrint and it worked well. I'll post a message when our new hompage is available. There will be a detailed howto on this page (...)   (25 years ago, 16-Nov-00, to lugnet.robotics)   
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