Compressed air for rapidly cooling motors?

[Al Skierkiewicz]

Everett,
Did you see this robot? Can you tell me what they mean by hollow bolt/active cooling?

[Richard Wallace]

Originally Posted by Al Skierkiewicz

Everett,
Did you see this robot? Can you tell me what they mean by hollow bolt/active cooling?

Isaac Rife (IKE) may already know about this. If not, I'll have a look when I see 33 at MSC in few days. The team is generally very forthcoming about the cool features embodied in their robot.

[BJC]

First off, Aren Hill deserves all credit for this idea.

Basically, the mounting holes for a CIM type motor are the only access points to the inside of the motor. For reasons described earlier cooling is much more effective when air is forced directly past the armature. When you put 2 and 2 together you end up with hollow fasteners. I'll leave the rest as an exercise to the reader.

Cheers, Bryan

[Jon Stratis]

Originally Posted by BJC

First off, Aren Hill deserves all credit for this idea.

Basically, the mounting holes for a CIM type motor are the only access points to the inside of the motor. For reasons described earlier cooling is much more effective when air is forced directly past the armature. When you put 2 and 2 together you end up with hollow fasteners. I'll leave the rest as an exercise to the reader.

Cheers, Bryan

If you mean replacing the bolts holding the motor together with different ones... I would think this is a violation of R30:

The integral mechanical and electrical system of any motor must not be modified.

Those bolts are pretty integral to the mechanical system of the robot... without them the whole thing falls apart and stops working!

[Aren_Hill]

Originally Posted by Jon Stratis

If you mean replacing the bolts holding the motor together with different ones... I would think this is a violation of R30:



Those bolts are pretty integral to the mechanical system of the robot... without them the whole thing falls apart and stops working!

Nope, a CIM motor has two openings in it that are entirely legal to blow air into without modifications.

-Aren

[Richard Wallace]

Originally Posted by Aren_Hill

Nope, a CIM motor has two openings in it that are entirely legal to blow air into without modifications.

Very cool, Aren! 91979A605 or something similar?

[Aren_Hill]

Originally Posted by Richard Wallace

Very cool, Aren! 91979A605 or something similar?

Yup, you can even get 10-32 to 1/4" tube push to connect fittings to make it easier to hook up air.

Feel free to come by 1296 at champs, we'll also be running it.

-Aren

[Thad House]

Originally Posted by Aren_Hill

Yup, you can even get 10-32 to 1/4" tube push to connect fittings to make it easier to hook up air.

Feel free to come by 1296 at champs, we'll also be running it.

-Aren

So is the air actually flowing during a match or only being hooked up afterwards between matches?

[Aren_Hill]

Originally Posted by Thad House

So is the air actually flowing during a match or only being hooked up afterwards between matches?

Between.

Nothing hooked up to the robots pneumatics system.
It's mainly about air flow, and the robot system isn't the greatest for that anyway.

The testing I did on some of this helped lead to motors.VEX.com
Mainly the "peak power duration test"

-Aren