Omron OMNUC W Series Manual page 256

Table 9.3 Troubleshooting Table with No Alarm Display (cont'd)
Symptom
Abnormal noise
Cause
Mechanical mounting is incorrect.
Bearing is defective.
Machine causing vibrations
9-45
9.4 Error Diagnosis Due To Operating Status
Inspection
Check if Servomotor Tighten mounting screws.
mounting screws loose.
Check if coupling not cen- Center coupling.
tered.
Check if coupling unbal- Balance coupling.
anced.
Check noise and vibration Remove the cause of problem
near bearing. and repair.
Check for presence of for- Remove the cause of problem
eign object, damage or and repair.
deformation of movable
parts of machine.
Remedy
9