CIM motor on 30A

[jason701802]

we are using 4 2.5in CIM motors for our drive train and we are going to use a 3in CIM motor for our mechanism to lift other robots and i want to know if I have to put in one more maxi block to run the 3in or if I can just run it of a 30A fuse

[waialua359]

motors should be run at the recommended level. no more, no less.

[Greg Needel]

Originally Posted by waialua359

motors should be run at the recommended level. no more, no less.

not nessicarily true. You can gear the motors to match their performance curves, and in some situations (low torque, High speed) it may be better to gear them to have a max torque at 30 amps. There are no rules against using smaller breakers, because the only side effect for a mistake is a tripped breaker. If I recall correctly in years past pre-2004 there were no 40 amp breakers, cims were run on 30's and didn't have a problem.

[Jared Russell]

Depends completely on the application. Last year we had our flywheel running on a 30A breaker during testing, and it never had a problem because it wasn't drawing much current at all.

[tdlrali]

depends on the load on the motor. unless it is a high-load situation or you want to switch directions quickly (full fwd -> full rev), the 30A should be fine. Test it, you can always replace it later if you have problems.