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Re: what motor did you use(arm)
Then again you could also consider the arms moment of inertia because many of these arms have a large weight at the end of a long stick. So even if the motor can move the arm fast, it might take too long to get up the speed.
We didn't use an arm this year but we used one in 2005 and each joint was powered by a fischer price. I forget the reduction on the lower arm but the upper arm somehow got to 1157:1. Not by design, but hay it was a highly entertaining fluke.
Alex
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