CIM Like motors for non-FRC use

[Gabe5406]

Can anyone suggest good sealed, CIM like motors. Essentially with the same torque but lighter and smaller form factor.

[Richard Wallace]

Are you working with 12V or something higher?

If you have 120V dc source, then these stand mixer motors are very good. Overall reduction in the right-angle gear head is 49:1.

50 Newton-meter output torque at ~12A current draw. About 250 RPM at peak power, which is ~1.5 HP continuous duty. If your supply can handle higher current draw, the motor is capable of higher intermittent power.

[Gabe5406]

We are looking for 12V input, approximately 21.38 Nm and 128 rpm(after gearing). The project is an FRC like drive train, so stalling is expected.
Thanks

[Richard Wallace]

I don't know of a motor that is better than a CIM for the application you described.

[Gabe5406]

I agree, but weight is extremely critical to our project, any suggestions would be very helpful.
Thanks again.

[Cothron Theiss]

It honestly sounds like the CIM is what you're looking for. The issue you'll run into is that what makes the CIM so robust and so dependable is, in part, its weight. [WARNING: Over simplified explanation incoming.] The CIMs have more thermal mass and so are able to handle more power going to thermal energy instead of kinetic energy, i.e., stalling. If you're able to find something as robust as the CIM in a smaller form factor, I'd love to hear about it. But it really sounds like the CIM is what you want.

[Ari423]

Does anyone know of a motor similar (CIMilar?) to a CIM but larger with more power? The idea being that you would only need one motor per drivetrain gearbox instead of 2 or 3. I believe some year before I joined the rules allowed for a larger CIM-style motor, but according to my mentor it didn't get much use and wasn't allowed again. I've seen similar motors on eBay and AliExpress like this one, but I don't really trust them (especially because the specs listed on this model don't come near to the 800W claim).

[Harrison.Smith]

Originally Posted by Ari423

Does anyone know of a motor similar (CIMilar?) to a CIM but larger with more power? The idea being that you would only need one motor per drivetrain gearbox instead of 2 or 3. I believe some year before I joined the rules allowed for a larger CIM-style motor, but according to my mentor it didn't get much use and wasn't allowed again. I've seen similar motors on eBay and AliExpress like this one, but I don't really trust them (especially because the specs listed on this model don't come near to the 800W claim).

I remember seeing megaCIMs (doubt that was the name) around the lab before. Mentors always had said they were just a precursor to the standard cim now.

[troy_dietz]

The larger CIM motor is part number FP801-005 and was commonly referred to as the "minibike" motor. It was legal in 2006 and 2007.

Preformance Sheet: http://web.archive.org/web/200612142..._FR801-005.pdf

Edit: You may also want to look into AmpFlow and similar motors. They've become practically the equivalent of the CIM in combat robotics, but that's starting to change with the increasing popularity of brushless drive motors.

[EricH]

Originally Posted by Ari423

Does anyone know of a motor similar (CIMilar?) to a CIM but larger with more power? The idea being that you would only need one motor per drivetrain gearbox instead of 2 or 3. I believe some year before I joined the rules allowed for a larger CIM-style motor, but according to my mentor it didn't get much use and wasn't allowed again. I've seen similar motors on eBay and AliExpress like this one, but I don't really trust them (especially because the specs listed on this model don't come near to the 800W claim).

Originally Posted by Harrison.Smith

I remember seeing megaCIMs (doubt that was the name) around the lab before. Mentors always had said they were just a precursor to the standard cim now.

The Big CIM is a bit of a misnomer. Here's the deal on those, from someone who was there the two(?) years they were legal:

They're electric minibike motors, came with belt drive system. They're bigger than the standard CIM, BUT they were also just a bit different. I want to say it was faster speed, slightly less torque. They were legal in '06 and I want to say '07. I know one was used on a shooter... geared up!


That being said, CIM motors don't just come in FRC sizes. I've seen 'em big enough to haul a (literal) ton at walking speed with just one, given the proper setup of course. May I suggest poking around the manufacturer's site? You just might find something in the right range.

[Jared Russell]

Originally Posted by Ari423

Does anyone know of a motor similar (CIMilar?) to a CIM but larger with more power? The idea being that you would only need one motor per drivetrain gearbox instead of 2 or 3. I believe some year before I joined the rules allowed for a larger CIM-style motor, but according to my mentor it didn't get much use and wasn't allowed again. I've seen similar motors on eBay and AliExpress like this one, but I don't really trust them (especially because the specs listed on this model don't come near to the 800W claim).

Many BattleBots teams swear by Magmotors: http://magmotor.com/brushed/brushed.html

[GeeTwo]

Originally Posted by Harrison.Smith

I remember seeing megaCIMs (doubt that was the name) around the lab before. Mentors always had said they were just a precursor to the standard cim now.

Here are the performance curves for the old 3 inch CIM Karthik posted a few years back. They actually had a lower peak power than the 2.5" CIM, though the torque (and in particular torque per amp) was better.