Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

10 Inspection, Maintenance, and Troubleshooting10.2.1 Servomotor Inspection10.2 Inspection and Maintenance10.2.1 Servomotor InspectionThe AC servomotors are brushless. Simple, daily inspection is sufficient. The inspection and maintenance frequenciesin Table 10.9 are only guidelines. Increase or decrease the frequency to suit the operating conditions andenvironment.IMPORTANTDuring inspection and maintenance, do not disassemble the servomotor. If disassembly of the servomotor isrequired, contact your Yaskawa representative.Table 10.9 Servomotor InspectionsItem Frequency Procedure CommentsVibration and Noise Daily Touch and listen. Levels higher than normal?ExteriorAccording to degreeof contaminationClean with cloth or compressedair.−Insulation ResistanceMeasurementReplacing Oil SealOverhaul* Measure across the servomotor FG and the phase-U, phase-V, or phase-W power line.10.2.2 SERVOPACK InspectionAt least once a yearAt least once every5,000 hoursAt least once every20,000 hours or 5yearsDisconnect SERVOPACK andtest insulation resistanceat 500 V. Must exceed 10 MΩ . ∗Remove servomotor frommachine and replace oil seal.Contact your Yaskawa representative.Contact your Yaskawa representativeif the insulationresistance is below 10 MΩ .Applies only to servomotorswith oil seals.The user should not disassembleand clean the servomotor.For inspection and maintenance of the SERVOPACK, follow the inspection procedures in Table 10.10 at leastonce every year. Other routine inspections are not required.Table 10.10 SERVOPACK InspectionsItem Frequency Procedure CommentsClean Interior andCircuit BoardsAt least once a yearCheck for dust, dirt, and oilon the surfaces.Clean with cloth or compressed air.Loose ScrewsCheck for loose terminalblock and connectorscrews.Tighten any loose screws.Defective Parts inUnit or onCircuit BoardsCheck for discoloration,damage, or discontinuitiesdue to heating.Contact your Yaskawa representative.10-22