This article is for when motor errors are frequently occurring and involves your robot/black motor box.
Check Motor Belts
The most common cause of motor errors is belt tension.
Ensure that your motor belts are attached correctly. The motor belts should
- have adequate tension. (The belts should be taut and not sagging.)
- be straight and level.
Ensure that the constants/parameters have the proper variables.
Perform Motor Lock Test
Lock the motor and try to move the machines in the direction you have locked. Perform this test several times, moving the machine a 1/4 inch or so before re-locking and testing again. (The idea is to test the entire 360 degree revolution that the motor turns.) If the motor grinds instead of staying locked in place, you may have a faulty motor.