YASKAWA E-S Series Product Manual

Contents

3.2 Coupling to the Machine3.2.1 Using a Coupling3-43.2 Coupling to the MachineYou can couple the Servomotor to the machine with either a coupling or a belt.Use the following procedures.3.2.1 Using a Coupling1. Wipe off all of the anticorrosive coating from the motor shaft.2. Confirm that the centering accuracy is within the specified range using a dial gauge orother means.If a dial gauge is not available, slide the coupling along both shafts and make adjustments so that itdoes not catch.3. Align the shaft of the Servomotor with the shaft of the machine, and then connect theshafts with the coupling.• Use a flexible coupling that is designed for Servomotors. We recommend that you use a dou-ble-spring coupling, which provides some tolerance in eccentricity and deflection.• Select a suitable size of coupling for the operating conditions. An inappropriate coupling maycause damage.• When you couple the shafts, make sure that the required centering accuracy is achieved.Vibration will damage the bearings and encoders if the shafts are not properly centered.• When you attach the coupling, do not subject the shaft to direct shock. Also, do not sub-ject the area around the encoder to shock. Shock may damage the encoder.• If the coupling makes any abnormal noise, center the shafts again until the noise is elimi-nated.• Make sure that the thrust load and radial load are within specifications. Refer to the spec-ifications for each type of Servomotor for the thrust load and radial load.ImportantMeasure this distance at four different positions onthe circumference. The difference between themaximum and minimum measurements must be0.03 mm or less.Even within this range, make adjustments toincrease centering accuracy as much as possible.Centering AccuracyNote: When making the measurements, turnthe coupling and motor shaft together.Important