Just a heads up here. Over the past two weeks, the pair of robots we use have started to exhibit some strange behavior. For example, turns were becoming increasingly inconsistent and the robot would sometimes move in jerky movements at slow speeds. The robots are 3 and 4 years old and initially we thought it might be a motor problem or possibly the new NXT software. Our teenage mentor suggested that the Lithium Ion batteries may be going bad. While we were initially skeptical, since both batteries showed full charges, we replaced the rechargeable batteries with alkaline batteries and the robots were back to their "normal" selves. Aha!
The lesson here is if you're using a robot with a rechargeable battery that is a few years old and you see some strange behavior, try swapping out the
rechargeable with a new set of batteries. It could save you and your team from going mad.
John J. Barrett
Industrial Medium, Inc.
1616 Anderson Road
McLean, VA 22102
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