Excellent points Eugene, I hadn't thought about the current limiting feature (probably because our application operates well below stall torque and doesn't draw much current).
There are noticeable differences depending on your application, so maybe FIRST is justified in sticking with the 9012 motor. We are prepared to swap on Thursday of the Boston event.
Best of luck to everyone!
RAZ
Quote:
Originally Posted by eugenebrooks
By definition, motors supplied by FIRST in the kit should be legal.
The notion that the 9012 and the 9003 are equivalent, however,
is a stretch. The 9012 has the internal current protection
and the 9003 does not. This difference is huge when a motor
is operated close to full power to lift a robot. We had to specifically
modify our robot lift to change the gearing to keep the internal current
limiter in the motor from popping midway through the lift, even
though the circuit breaker for the victor controlling the motor was
the 20 amp one.
The 9012 motor is easly obtained, although you might have to
sort through the parts that Fisher Price wants to sell you. If
the 9003 is declared legal we will happily swap the 9012 out
to ditch the internal current limiter.
Eugene
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