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Unread 17-02-2010, 13:45
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Tom Line Tom Line is offline
Raptors can't turn doorknobs.
FRC #1718 (The Fighting Pi)
Team Role: Mentor
 
Join Date: Jan 2007
Rookie Year: 1999
Location: Armada, Michigan
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Re: Robot refuses to turn!

Hrm. Still having problems? Let's confirm a ew more things:

1. Live axle or dead axle, cantalevered or not, and are you using bearings or bushings?

2. How tight are your chain runs, are they nicely alligned, are your transmissions stiffly mounted or flexing?

3. How long are the motor shafts, are the sporckets mounted as close to the tranny as possible to prevent bending moment?

4. What trannies are you using? There are a number of cim pinions that are very close to the same but will not function well interchangeable under load. Have you disassembled the trannies and confirmed, step by step, correct assembly and lubrication?