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Unread 11-01-2012, 12:17
Aren Siekmeier's Avatar
Aren Siekmeier Aren Siekmeier is offline
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Re: CIM Motor Sacrifice

I think this thread needs some numbers to justify the motor comparisons going on. As stated above, power is what matters, because you can gear all the motors to the same speed, and if they have the same power, the torque will be more or less the same (ignoring some inefficiencies).

The CIM has a max power of about 337W.
The FP-2011 has a max power of about 289W.
The RS775-18V (powered at 12V) has a max power of about 266W.

So they are somewhat close, with CIM beating FP beating RS775. Since the CIM is so much larger, most people will agree that it's the motor to put in the drivetrain since it will take continuous duty all day (relatively speaking). The FPs and RS775s will be more sensitive to overheating and would be better suited to intermittent duty, i.e. a shooter (even if the wheels are always spinning, they are only loaded down when you shoot, which will be relatively infrequent).

We also have a much larger limit on quantity in past years. Even with 4 CIMs in the drivetrain, you can have another 2 FPs and 4 RS775s, besides all the other motors at our disposal. So you can make up for another 4 or 5 CIMs in power, but of course your battery will start complaining before long.

We are foreseeing something like 4 CIM drive, 2 FP shooter, and various smaller motors for collection and loading, based on our testing so far.
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