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Re: pic: holonomic vex robot
I dont think its the motors being biased, its probably differences in friction from the motor to the wheels, every robot in vex seems to have the problem, even FIRST robots with 2WD and castors have this problem without any correction.
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Re: pic: holonomic vex robot
I didn't have any wheels on the motor. The shaft went straight into the encoder and nothing else. And you do have to remember that they are vex motors, which, I'm sorry to say, aren't the hightest quality motors out there in the market.
EDIT: I tested 4 more motors using the same program. The motors were consistantly about 3% faster going backwards than forwards. Motor 1 Forward: 10339 Backward: 10780 Motor 2 Forward: 10136 Backward: 10409 Motor 3 Forward: 9976 Backward: 10269 Motor 4 Forward: 10215 Backward: 10711 Motor 5 Forward: 10070 Backward: 10280 |
Re: pic: holonomic vex robot
Thanks Kevin,
I hope this settles the question of motor biasing. Also any distances counted without wheels will only be increased by added stress on the motor. |
Re: pic: holonomic vex robot
I was a FLL programmer for three years, and when using lego motors every motor ran at a different speed. I don't think this is something that can be overcome when using DC motors.
I would like to see the code to make that move. |
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