Small ultrafine pulverizers may develop electrical, mechanical, or motor-related faults during operation. Before carrying out any inspection or maintenance, disconnect the power supply completely and make sure the machine has stopped running.
| Fault | Possible Cause | Recommended Solution |
|---|---|---|
| Motor does not start after power-on | 1. Poor power connection or loose plug 2. Poor contact at the power switch 3. Poor contact at the microswitch 4. Thermal protector failure | 1. Check and repair the power connection or replace the connector 2. Repair or replace the power switch 3. Adjust or replace the microswitch as required 4. Replace the thermal protector |
| Motor rotates slowly, fails to start normally, or vibrates after power-on | 1. Mechanical blockage caused by foreign material inside the grinding chamber 2. Centrifugal mechanism not fully opened 3. Low power-supply voltage | 1. Remove foreign material from the grinding chamber. Run the machine without feeding material for about 30 seconds before gradually increasing the feed rate 2. Check and correct the centrifugal mechanism 3. Check and adjust the power-supply voltage |
| Motor housing becomes excessively hot | 1. Excessive operating load 2. Motor is damp 3. Low power-supply voltage | 1. Reduce the operating load or feed rate 2. Dry the motor and check for moisture ingress 3. Check and correct the power-supply voltage |
| Sparking or arcing occurs at the commutator | The commutator surface is contaminated or uneven | Stop the machine, disconnect the power supply, and clean the commutator surface. Inspect the commutator and brushes for excessive wear before restarting |
Maintenance Considerations
Operators should not continue running the machine when abnormal vibration, excessive motor temperature, or electrical sparking occurs. First identify the source of the fault and correct it before resuming operation.
Regular inspection of the grinding chamber, electrical connections, motor, microswitches, thermal protection devices, and other wear components can help reduce unexpected downtime.
For customers requiring replacement or customized mechanical components for small ultrafine pulverizers, Hansheng Automation can provide precision machining based on customer drawings and technical specifications, supporting non-standard shafts, housings, rotating parts, brackets, and other precision components.
