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Re: Weird Gearbox Sound
Was there any condensation forming from the cold? Could the grease in the gearbox have frozen? I had a similar problem with a gearbox on an R/C truck. Either the gear or the motor output shaft had become loose(maybe both, can't remember) and the gear wasn't making constant contact with the motor. There was some dust where the gear had worn. What gearbox and motors are you using? What are the gears made of? Any plastic moving parts?
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"You know, it's amazing how many things you can take apart with just one ordinary screwdriver!" - Calvin, from Calvin and Hobbes
"There's nothing a little duct tape and surgical tubing can't accomplish." - Sheldon J. Plankton
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