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Re: Fisher Price Breaker Size
Nippon-Denso 18.6
Nippon-Denso 18.6
Keyang 11.8 19
Fisher-Price 70
Globe 21.58
CIM 133
Mabuchi 6.2
Banebots 37
Compressor start 25
These are the stall currents for the motors in the 2009 KOP.
<R54> All electrical loads (motors, actuators, compressors) must be controlled by relay or PWM output signals sent by the Digital Sidecar to an appropriate power regulating device
A. Each CIM motor and Fisher-Price motor must be connected to one Victor or Jaguar speed controller. They must not be connected to relay modules.
B. Servos must be directly connected to the PWM ports on the Digital Sidecar. They must not be connected to speed controllers or relay modules.
C. If used, the compressor must be connected to one Spike relay module.
D. Each other electrical load (motors or actuators) must be connected to one Victor or Jaguar speed controller or one Spike relay module.
Please note that only motors that are 20 amps or less stall current can be powered by relay(Spike) as that is the relay specification. An exception to this rule is the compressor which has a start current more than double it's run current. For this relay only you may substitute (read this as "should") a 20 amp circuit breaker in place of the relay mounted 20 amp fuse.
Any team may choose to run any motor from any breaker as long as the current rating and wire size rules are maintained. However, sound electrical practice and the rules allow you to size your breaker/wire/motor appropriately.
The 2009 game is unlikely to cause high currents in drive motors. That being said my normal recommendation for #10 wire to feed CIM motors and FP motors may not produce significant gains in this year's design only. Electrical rules allow you to use #12 wire with 40 amp circuit breakers (See R45 for all specifications) and #14 wire with 30 amp breakers. Therefore, should you desire maximum performance over all possible game conditions, my recommendations would be for #12 minimum for FP and CIM motors fed with 40 amp breakers. The Banebot motors can be fed with 20 or 30 amp branch circuits depending on your design, transmission and intended use. Please be advised that the Denso, FP and Keyang motors have internal thermal breakers in addition to any external electrical protection you provide.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.
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