Chief Delphi - Hot Motors

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We use both the CIM's and the Drills Motors on each gear box. The CIM don't like to heat up very much at all. Our drill motors were a problem tough. So we put two of the large muffin fans at opposite side and reversed one. We than had a constant airflow going over the motors. Works great!!! You know we were rough at Buckeye ask team 306

As long as the motors are being run how it was meant to simple solutions should work. All we did was stick one of the mini muffin fans right on top of the drill motor casing. IT's not perfect, but it worked pretty well. True you can't run those drill motors for a long time until they overheat, but I don't think any cooling mechanism would be perfect.

Simple is nice.

ok, as an add on to my previous post about coolant spray, you do not want to add on so much that it drips or creates frost, thus avoiding what al warned about. and also, if you decide to use it, remember after running the motor for a long time, give it a rest, while the coolant spray might cool things down on the outside, the inner workings need to cool as well. and this shouldnt be a permanent fix for after every match. for instance, in the quater, semi, and finals, the fisher price motor that we use for our vacuum pump overheats a lot, almost to the point where in some matches before we caught on to the problem, it just didnt work.

just a heads up for anyone trying the spray coolant method

We have had no problems with drill motors overheating. They are in a dual motor gear box with the CIM motors and to my knowledge we have never tripped a breaker or heated up our motors. If you would like to see our transmission design it is already up on our website.......you may have to sort through some files to find it but I promise it is there.
http://neverland.ncssm.edu/robotics

Just go to the media page and then download the autodesk files. If you are heating them up in the short 2 minute period of competition then there could definately be a problem. Especially if you are getting them hot enough to desolder the motor leads and such. Also be careful running the boschs at really slow speeds for long periods of time as the fan is designed for a high speed motor and is not effective at low speeds.
-Aaron

Quote:

Originally Posted by aaronbr28040

yes the 2 minutes shouldnt mess things up too much. i believe the desoldering thing was another isolated thing that came up in the topic when we were discussing the destruction of drill motors via heat. as for the 2 minute thing again, well, 2 minutes is one thing, but when practicing before the shipping date, the drive team can go through quite a few batteries before letting it cool down, not a smart thing, but we try to give and take between them and the pit crew...

Quote:

Originally Posted by Joe Ross

Make sure that your motors are geared low enough that they don't come close to stalling.

THat's for sure. In 2003, we used fisher price on our rear drive and we smoked 3 sets in St. Louis because of gearing problems. This year, we used chippewas geared fairly close to right and the motors never even got warm no matter how long we ran them