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Re: van Door motors stalling help
we had this problem as well...switch to the keyang motors, they are very powerful and wont backdrive....we had these connected to a chain running our whole arm (before being cut to its size 55 inches) and a battery on top of it to resemble the weight of the ball plus arm components.....it held it in place and was able 2 lift it with slight gearing....(we have 2 motors connected) ...good luck!
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