Bench Grinder Troubleshooting Method

The motor does not rotate (there is electromagnetic sound)

Causes: 1. The starting capacitor is damaged; 2. The three-phase power supply is out of phase; 3. The power switch is damaged; 4. The bearing is stuck; 5. The winding is burned out

Remedy: 1. Replace new capacitor; 2. Check and repair circuit; 3. Replace power switch; 4. Replace bearing; 5. Repair winding

The motor does not turn (no electromagnetic sound)

Causes: 1. The power switch is damaged; 2. Power failure; 3. The winding is burned out

Remedy: 1. Replace the power switch; 2. Wait for power supply; 3. Repair the winding

Grinding wheel is brittle or wears out too quickly

Causes: 1. The type of grinding wheel is incorrect; 2. The grinding wheel is out of date or of poor quality; 3. The bearing is damaged; 4. The installation is incorrect

Remedy: 1. Replace the grinding wheel corresponding to the type; 2. Replace the qualified grinding wheel; 3. Replace the bearing; 4. Install correctly

abnormal sound

Causes: 1. Serious wear of the bearing; 2. Improper installation of the grinding wheel; 3. Correct phase operation; 4. Winding failure

Remedy: 1. Replace the bearing; 2. Install the grinding wheel correctly; 3. Check and repair the power supply; 4. Check and repair the winding

Winding burned

Causes: 1. The stator and rotor are swept; 2. The three-phase motor runs with open phase; 3. The single-phase motor is mistakenly connected to the 380V power supply

Remedy: 1. Replace the bearing; 2. Check and repair the power supply; 3. Check and repair the power supply