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Unread 09-10-2009, 15:29
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Brandon Holley Brandon Holley is offline
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FRC #0125 (NU-TRONs, Team #11 Alumni (GO MORT))
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Re: Motors - another concept for FRC

Quote:
Originally Posted by EricH View Post
John: The CIM weighs a lot more. That might be enough to put an FP in where a CIM could go. Just one of those accursed design tradeoffs that come with any design problem. And yes, I might use an FP instead of a CIM even if I could use a CIM. It depends on the application.
Did you account for the weight you are going to add to get the FP motor to an equivalent spec of a CIM motor? Unless your application requires ~15000 rpm at w/e the output torque of the FP is theres going to be some weight gain there.

Sure there will be weight for the CIM too because not too many applications are goign to use the CIM at a free speed of ~5000 rpm, but to simply get the FP to be similar in speed and torque as a CIM it will require a signifigant amt. of weight.

I agree with JVN on this one, given the choice of FP or CIM I would go CIM everytime, regardless of any kind of weight gain. The reliability factor alone is worth it.

Brando
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