Chief Delphi - CIM motors

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Chief Delphi (http://www.chiefdelphi.com/forums/index.php)

- Technical Discussion (http://www.chiefdelphi.com/forums/forumdisplay.php?f=22)

- - CIM motors (http://www.chiefdelphi.com/forums/showthread.php?t=110987)

Mr V	11-01-2013 14:44

Re: CIM motors

Based on our shooter for last season the motor power does not make a huge difference in shooting distance, it does however affect how quickly you can get the wheel back up to speed.

We initially designed our shooter for Rebound Rumble to be powered by two 775s. One night when we were at our practice location the shooter started making a funny clunking sound. We traced it down to one of the motors. Since we didn't have a spare with us and we were mainly working on our autonomous we removed the second motor. We still shot 95% or so of the distance as we could with two motors, so we stuck with the single motor.

DonRotolo

11-01-2013 21:33

Re: CIM motors

Quote:

Originally Posted by John (Post 1213108)

Not according to the VEX website. BAG motor is 217-3351, miniCIM is 217-3371.

I cannot imagine that the smallest CIM, about the size of an RS5550, can be more powerful than the Mini-CIM, about 2/3 the size of the larger 2.5" CIM (and same shaft diameter). Physically they are so very different, the larger one is most likely the more powerful one.

(I wonder where they got the name "BAG Motor" from?)

Ether

11-01-2013 21:40

Re: CIM motors

Quote:

Originally Posted by DonRotolo (Post 1213354)

(I wonder where they got the name "BAG Motor" from?)

Don't ask.

timytamy

11-01-2013 21:42

Re: CIM motors

We tried the Mini-CIM on one of our prototype shooters and found that it gave an extra 1-2 meters in range without changing any other parameters, the RPM seems to play a large factor in the range of the shooter

Also we've been calling them mummy/daddy-CIM, teenage CIM and baby CIM.

billbo911

12-01-2013 00:23

Re: CIM motors

1 Attachment(s)

As promised, here is some very raw data. This is a comparison between the CIM and Mini CIM driving the same system.

In a nut shell, the the Mini CIM draws more current at the same voltage.

Mr V	12-01-2013 02:22

Re: CIM motors

Quote:

Originally Posted by DonRotolo (Post 1213354)

(I wonder where they got the name "BAG Motor" from?)

I'm guessing from the manufacturer's name since CIM stands for CCL Industrial Motor co.

Ether

12-01-2013 02:39

Re: CIM motors

1 Attachment(s)

Quote:

Originally Posted by billbo911 (Post 1213481)

As promised, here is some very raw data. This is a comparison between the CIM and Mini CIM driving the same system.

In a nut shell, the the Mini CIM draws more current at the same voltage.

Using the CIM's current draw (19.4 amps) at 10 volts, the CIM's speed can be estimated.

billbo911

12-01-2013 11:45

Re: CIM motors

Quote:

Originally Posted by Ether (Post 1213520)

Using the CIM's current draw (19.4 amps) at 10 volts, the CIM's speed can be estimated.

3726 RPM at 10v. Excellent, that confirms that it is operating exactly in the range we expected it would, 2K-4K RPM. It also confirms the video was accurately representing these numbers.

DonRotolo

12-01-2013 23:26

Re: CIM motors

Quote:

Originally Posted by Mr V (Post 1213517)

I'm guessing from the manufacturer's name since CIM stands for CCL Industrial Motor co.

Thanks, that's what I am guessing.

Maybe Beijing Autonomous Gearworks or something....:confused:

Ian Curtis

12-01-2013 23:49

Re: CIM motors

Quote:

Originally Posted by DonRotolo (Post 1214071)

Thanks, that's what I am guessing.

Maybe Beijing Autonomous Gearworks or something....:confused:

Paul Copioli has some thoughts on this subject. :p

AlexH

13-01-2013 00:03

Re: CIM motors

Quote:

Originally Posted by nathan_hui (Post 1213112)

Maybe we should just call them grandpa CIM, father CIM, and baby CIM.

i propose

CIM, shorty CIM, and TinyCIM

Oldbikerider

13-01-2013 22:52

Re: CIM motors

We're using "baby CIM" for the small one because they are so cute:)

Graham.

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