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Unread 11-02-2014, 18:15
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Paul Copioli Paul Copioli is offline
President, VEX Robotics, Inc.
FRC #3310 (Black Hawk Robotics)
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Re: Need advice on motors, gearboxes, and ESCs

Quote:
Originally Posted by nathannfm View Post
Hi other Nathan (lol)

You won't need the 12 tooth pinion gear if you are using the VersaPlanetary. You should know that these gearboxes are not actually designed to work with CIMs and MiniCims, some modification is necessary (I am not sure what you have to do but I bet you could find it by searching CD) I am suprised no one mentioned the P80 gearbox. http://banebots.com/c/P80K-S4 (the grease and CIM mounting kit are wirth it for $12 more) I would recomend this over the VersaPlanetary for a CIM to wheel drive robot as these gearboxes are designed for CIM style motors and are much beefier.
Emphasis mine.

I will not editorialize, but the stated manufacturer's maximum torque spec for the P-80 is 85 Ft-lbs. The stated manufacturer's maximum torque spec for the VP using a 10:1 is 74 Ft-lbs. If you use qty 2 3:1 stages on the VersaPlanetary (like the P-80 9:1), then the torque rating jumps to 116 Ft-lbs so I don't know where you can claim the P-80 is "much beefier".
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In full disclosure I am the President of VEX Robotics, a division of Innovation First International.