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Re: Globe Motor Durability Versus RS-545
67 modified a globe gearbox to speed up our conveyor system that feeds the "shooter". In this modified condition, the globe did not have enough torque to overcome our drivers aggression to load many balls into the conveyor quickly. The motor would become stalled and the drivers would have to reverse it to correct the issue. The globe motor never burned up even though it was stalled many times during practices.
We then replaced the globe with a RS-545 and a P60 64:1 gearbox. We competed at Cass Tech, then went to Lansing and lost a RS-545 during practice on Thursday b/c we stalled it out trying to pickup to many balls. We replaced the motor, competed at Lansing, then went to Troy and lost the RS-545 when we tried to pickup to many balls. We replaced it again and competed at Troy without issue.
The morale of the story is to not stall the RS-545 or you will be replacing it. Luckily, we have failed these motors at opportune times so far. I am sure we will lose another one before we are done with this robot. Odds are, sometime on Thursday at MSC.
We realize that we are asking this motor to do a little more than it is capable of, and we may burn it up if exercised too aggresively. Given the cost ($6/motor) and weight we are comfortable with the risk we are taking.
The P60 gearbox though is top notch! Light weight and compact.
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2005 FIRST World Champions (330, 67, 503)
2009 FIRST World Champions (111, 67, 971)
2010 FIRST World Champions (294, 67, 177)
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