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Unread 24-10-2001, 14:31
Paul Copioli's Avatar Unsung FIRST Hero Woodie Flowers Award
Paul Copioli Paul Copioli is offline
President, VEX Robotics, Inc.
FRC #3310 (Black Hawk Robotics)
Team Role: Engineer
 
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Motors

I will try to anwer your motor questions, but they are not "official" responses. The globe motors and the keyang motors used in this competition are slightly different than the ones used the FIRST competition. The drill motor is in no way anything like the one used for the FIRST motors. What you are probably hearing is that the globe motors are better for drive train. That is a gray area. The Keyang motor actually has more HP, but has a couple of negatives: (1) Has an internal temp sensor which effectively brings the motor to 0 torque if overheated, (2) a gear ratio of approximately 9:1 is needed to bring the output torque to an acceptable level. The globe motor is the choice of several teams, because of its output torque (although at 180 in-lbs it is higher than the trantorques are rated) and its ease of packaging. For our team this year, I advised the students to use the Keyang, because of horsepower, but they decided to use the globes for the advantages I discussed above. If you design the drive train correctly, either motor will work fine.

If you have any other technical questions, please feel free to contact me.

-Paul
Team 217, The Thunderchickens
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