Motion Control and Motor Drives

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About motor controlling

Hello, we are team 6191. We used motors to rotate arms, like the arm to deliver gears in 2017. A bit like the robot of team 5801(https://www.youtube.com/watch?v=ZElU-wQjTag). We deliver gears by rotating the box forward and the gear can be pull up smoothly. 

However, we have trouble on maintaining an arm in a chosen position. The way we used is to turn on and off the motor alternatively in very short time so that the arm seems to stay in the same place. After a few matches, our motor controller burned and the delivery box couldn't even stay in 0 degree.

Also, it swayed when the robot moved.

We hope this can be solved by changing the hardware device. Can you guys share your experiences?

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