Bosch Rexroth IndraDyn S - MKE Project Planning Manual

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112/131 Bosch Rexroth AG | Electric Drivesand ControlsRexroth MKE Synchronous Motors | Project Planning ManualStartup, Operation and Maintenance12.4 Maintenance12.4.1 GeneralSynchronous motors of the MK series operate without wear within the givenoperating conditions. However, operation under unfavorable conditions canlead to limitations in availability.●Increase availability with regular preventive maintenance measures. Observethe instructions in the maintenance schedule of the machine manufacturerand the described service measures.WARNINGDanger of injury due to moving elements! Danger of injury due to hotsurfaces!⇒ Do not carry out any maintenance measures when the machine is running.⇒ During maintenance work, secure the system against restarting and unauthorizeduse.⇒ Do not work on hot surfaces.12.4.2 Cleaning12.4.3 Bearings12.4.4 Connection CablesExcessive dirt, dust or shavings may affect the function of the motors adversely,may in extreme cases even cause a failure of the motors. For that reason, youshould cleanCooling ribs ● the cooling ribs of the motors at regular intervals, in order to obtain a sufficientlylarge heat radiation surface. If the cooling ribs are dirty in part,sufficient heat dissipation via the environmental air is not possible anylonger.An insufficient heat radiation may have undesired consequences. The bearingservice life is reduced by operation at impermissibly high temperatures (thebearing grease is decomposing). Switchoff caused by overtemperature despiteoperation on the basis of selected data, because the appropriate cooling ismissing.The nominal lifetime of the bearings is L10h = 30,000 h according toDIN ISO 281, ed. 1990, provided the permissible radial and axial forces are notexceeded (chapter 9.10.2 "Radial Load, Axial Load" on page 86). Even if thebearings are loaded with higher forces to a minor degree only, their service lifeis affected negatively.The motor bearings should be replaced if●●the nominal bearing service life has been reached,running noises occur.We recommend that bearings be replaced by the Bosch RexrothService.Check connection cables for damage at regular intervals and replace them, ifnecessary.Check any optionally present energy management chains (drag chains) for defects.
Project Planning Manual | Rexroth MKE Synchronous Motors Electric Drivesand Controls| Bosch Rexroth AG 113/131Startup, Operation and MaintenanceDANGER12.4.5 Holding Brakes12.4.6 Battery ChangeDeath by electrocution possible due to live parts with more than 50 V!⇒ Do not repair any connection lines provisionally. If the slightest defects aredetected in the cable sheath, the system must be put out of operation immediately.Then the cable must be replaced.Check the protective conductor connection for proper state and tight seat atregular intervals and replace it, if necessary.see chapter 9.11 "Holding Brakes (Ex)" on page 90Drive devices of Bosch Rexroth observe voltage of battery safely and give justin time a warning "battery change".DANGERChange battery when machine isunder loadDANGERDANGERBattery changeDanger of explosion! Death, heavy personal injury and material damageby opening the motor housing in hazardous areas!⇒ Do not loosen housing screws when the motor is in hazardous operation.⇒ The MKE motor must be brought out of the hazardous area for changingthe battery.Changing the battery should be made, when machine is under load. This isnecessary to avoid an overrun in the motor encoder (switch off control voltagecan cause loss of absolute values).The following tools and spare parts are needed:●●●●Hex screwdriver for– MKE037 Size 2.5– MKE047 Size 3– MKE098 Size 4Needle-nosed pliersTorque wrench with setting range 1.3-6.8 Nm.New, ready-made battery for– MKE037 and MKE047 MNR: R911277133– MKE098 MNR: R911265187Danger to life and limb due to electrical power!To change the battery you must work when machine is under load. Therefore:●●Any work required on the electric system must only be carried by skilledelectricians.Shut down the power supply at the drive control systems and save againstre-energization!Dangerous movements! Danger to life, severe corporal or material damage!⇒ Shut down power supply at the drive control systems and save against reenergization!⇒ Change battery on drive control systems only when control voltage isswitched on. Is the control voltage is switched off, while the battery is removed,the absolute value is lost and, when the machine will be switched on, a failingmovement could be possible.
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Bosch Rexroth IndraDyn S - MKE Project Planning Manual

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