1.Check whether the cleaned commutator surface is smooth, the starter spring is flexible, and the rotating arm is in the breaking position.
2.Before you use it,you should check whether the commutator of the 12v geared motor is normal,wear and spark burn marks, if there is, should be handled in time to restart.
3.Check that the brush is normal in the inner gap of the brush grip. Check that the brushes are secure, dusty and clean.
The next,i will introduce starting methods of 12v geared motors
1.Start with a varistor. When the 12v geared motor is started, the starting current is limited by connecting a resistor in the rotor circuit. As the speed of the motor rises, the contacts of the varistor are cut off step by step.
2.When the 12v geared motor is started, all the varistor resistors are connected to the armature (rotor) circuit until all the starting resistors are removed.
3.When the machine is stopped, the load can be removed (except for the series excitation motor). Turn off the line switch, at which point the rotating arm of the starter should be immediately pulled to the open position by the spring.
But in fact,if you start with a varistor,the current of 12v geared motor can be reduced,but the disadvantages are that the equipment is heavy and the energy consumption is large.