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Unread 01-02-2002, 07:17
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Joe Johnson Joe Johnson is offline
Engineer at Medrobotics
AKA: Dr. Joe
FRC #0088 (TJ2)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 1996
Location: Raynham, MA
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Starting another test...

In honor of the skin cells on our beloved Mr. Lavery's thumb who gave their vary LIVES in the furtherance of our knowledge, I have begun another test...

First of all, I took a motor apart (not recommended for you folks at home since removing the armature from the magnets can cause you to loose up to 10% of your motor output).

From what I can tell, the motor seems pretty heat resistant on the insides. There are no plastic components that seem likely to melt or catch fire. In fact, the only plastic at all is the insulation on the wires and the gromets that the wires run through. The brushes are mounted to a circuit board type material that looks very fire resistant indeed.

Anyway, I am running the motor at 20V with no load. I have no sensors on the motor, I just want to run it until it is extremely hot and keep it there for a good long while, then let it cool down and see what ill effects I observe.

The only data I can give you at present is that it is drawing just under 2Amps (the readout on the power supply is flickering between 1 and 2 as it runs -- sorry I don't have a more elaborate set up).

I will keep you posted.

Joe J.