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Re: Gearing a Rotating Arm
I've learned the hard way that it's better to be overly cautious with your ratios when designing an arm, and especially so when you need precision control. A more aggressive gearing may get you to the position you need to be faster, but it's also going to apply more torque to the motor which means it's going to draw more current. As a result, you're going to get an arm that "spring to life." Fine tune movements will be difficult, since by the time you apply enough power to get the motor moving with an aggressive gearing, it's going to be moving fast. Further still, the more you gear back, the less you have to stall your motor in order for your arm to hold position (if you have to stall it at all).
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