Gearmotors and Reducers
No.3 The noise and vibration are large
No.3 The noise and vibration are large
Gearmotor, gearmotor with brake [Cause and countermeasure]
The noise and vibration are large
Defect of the power source, wiring, or control (3.1)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.1.1 | Operation under phase loss | Input 3-phase securely |
Check the interphase voltage. Investigate the electromagnetic switch, fuse, etc. and repair or replace them | The interphase voltages are almost the same |
| 3.1.2 | Defect of the operation of the electromagnetic switch | Replacement | Check the continuity of the electromagnetic switch and the interphase voltage of the load side | The interphase voltages are almost the same |
| 3.1.3 | Mismatch between the inverter and motor | Setting of the optimal constant |
Input the automatic tuning or motor constant | The motor frame temperature is within the NISSEI CORPORATION guaranteed value range No abnormal vibration, noise, etc. occurs |
| 3.1.4 | The torque in the low-speed area is insufficient during inverter operation | Review of the torque boost valuein the case of V/F control. Review of the wiring length. Apply vector control and apply automatic tuning |
Check the torque boost value of the inverter. Apply vector control and apply automatic tuning | The motor rotates in the low-speed area and the motor frame temperature is within the NISSEI CORPORATION guaranteed value range |
| 3.1.5 | The brake wiring is not appropriate when the inverter is used | Review it and assembly the circuit securely | Check whether the circuit is assembled as recommended by the manufacturer | Circuit recommended in the catalog or instruction manual |
| 3.1.6 | Disconnection or connection defect of the brake line | Connect the wire securely | Check continuity of the connected part | There is continuity of the connected part |
| 3.1.7 | Defect of the circuit design or wiring of the brake circuit | Review it and assembly the circuit securely | Check whether the circuit is assembled as recommended by the manufacturer | Circuit recommended in the catalog or instruction manual |
| 3.1.8 | Defect of the SSR operation of the brake circuit | Review | Check the pressure resistance value of SSR | It is equivalent to or less than the pressure resistance value written on the surface of SSR |
| 3.1.9 | Breakage of the rectifier | Replacement | Contact NISSEI CORPORATION to check the continuity of each terminal of the rectifier | Contact NISSEI CORPORATION for the check method and check the appropriateness |
| 3.1.10 | The capacitor capacity is large | Replace the capacitor with a one with the specified capacity | Check the capacity written on the capacitor | The capacity written on the capacitor and that written on the nameplate value are the same |
Defect of the motor (3.2)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.2.1 | Disconnection of the stator winding |
Repair by NISSEI CORPORATION | Measure the interphase resistance of the motor | Report the interphase resistance to NISSEI CORPORATION and check whether it is within the allowable range |
| 3.2.2 | Layer short circuit of the stator winding |
Repair by NISSEI CORPORATION | Measure the interphase resistance of the motor | Report the interphase resistance to NISSEI CORPORATION and check whether it is within the allowable range |
| 3.2.3 | Input power source abnormality | Input the specified voltage | Check the interphase voltage of the motor end | Voltage and frequency written on the nameplate |
| 3.2.4 | Governor switch operation defect |
Repair by NISSEI CORPORATION | Check the operation and current value of the breaker and fuse | The motor does not rotate without load or the current value does not exceed the nameplate value with load |
| 3.2.5 | Damage or breakage of the bearing or shaft |
Repair by NISSEI CORPORATION | If the output shaft can be rotated, check the load | Contact NISSEI CORPORATION for the reverse rotation torque and check whether it is within the allowable range. No abnormal vibration occurs |
| 3.2.6 | Loosening of the motor mounting screws |
Retighten the bolts | Check whether there is no play in the motor and, if any, retighten the bolts for connection with the gear | Contact NISSEI CORPORATION for the tightening torque and check whether it is within the allowable range. |
| 3.2.7 | Contact between the fan and fan cover |
Repair or replacement |
Check appearance of the fan cover | They do not contact each other |
Defect of the gear head (3.3)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.3.1 | Scratch on the gear (intermittent sound) | Repair by NISSEI CORPORATION | Contact NISSEI CORPORATION | |
| 3.3.2 | Wear of the gear (continuous sound) | Repair by NISSEI CORPORATION | Contact NISSEI CORPORATION | |
| 3.3.3 | Damage or breakage of the bearing or shaft | Repair by NISSEI CORPORATION | Check whether the motor is rotating, no abnormal noise occurs, and the output shaft rotates smoothly | Contact NISSEI CORPORATION for the reverse rotation torque and check whether it is within the allowable range No abnormal vibration nor noise occurs |
Defect of the brake (3.4)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.4.1 | Rubbing due to a defect of the cap | Cap adjustment | Check the gap between the armature and field with a thickness gauge | Gap amount recommended in the catalog or instruction manual |
| 3.4.2 | Rubbing due to burnout of the brake coil | Replacement | Measure the internal resistance of the brake | Contact NISSEI CORPORATION for the internal resistance and check whether it is within the allowable range |
| 3.4.3 | Rubbing due to jamming of a foreign matter | Disassembly and cleaning | Check that the shaft moves smoothly when the power source is applied to the brake | |
| 3.4.4 | Input power source abnormality | Input the specified voltage | Check the brake input voltage | Report the input voltage to NISSEI CORPORATION and check whether it is within the allowable range |
Defect of the installation or couplings (3.5)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.5.1 | Loosening of the case mounting bolts | Retighten the bolts | Check whether there is no play in the reducer with motor and, if any, retighten the bolts for connection with the gear | Contact NISSEI CORPORATION for the tightening torque and check whether it is within the allowable range |
| 3.5.2 | Inconsistency of the centers of the shafts | Align the centers of the shafts with each other | Check the misalignment amount | Report the misalignment amount to the coupling manufacturer and check whether it is within the allowable range |
| 3.5.3 | Insufficient rigidity of the mounting base | Reinforce the mounting base to improve the rigidity |
Check that no abnormal vibration nor noise occurs | No abnormal vibration nor noise occurs |
Defect of a load part or operating conditions (3.6)
Gearmotor, gearmotor with brake
| Classification No. | Cause | Countermeasure | Inspection procedure and action | Judging criterion |
|---|---|---|---|---|
| 3.6.1 | Resonance of the load | Displace the resonance point | Adjust the balance of the load part | No abnormal vibration nor noise occurs |