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Unread 21-01-2011, 00:49
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Sticky Jim
AKA: Ned Shelton
FRC #3006 (Red Rock Robotics)
Team Role: Mechanical
 
Join Date: Jan 2011
Rookie Year: 2009
Location: Salt Lake City
Posts: 2
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Re: BB gearbox for arm/claw

Quote:
Originally Posted by jee7s View Post
I've got to ask...why such a high reduction on the "hand"? That's going to be awfully slow moving, and I doubt you'll need a lot of torque to pick up a game piece.
Assuming the 395 runs at 11,000 rpm, which is 25% of it's stall torque, the 326:1 gearbox makes the output speed 33rpm. The hand has to rotate 90 degrees to pick up a piece, and that would take .5 seconds at 30rpm.