Bosch Rexroth IndraDyn S - MKE Project Planning Manual

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92/131 Bosch Rexroth AG | Electric Drivesand ControlsRexroth MKE Synchronous Motors | Project Planning ManualOperating Conditions and Application Notes9.11.4 Layout of Holding BrakesHolding brakes on motors of Rexroth are basically not designed for servicebraking. The effective braking torques are different in static and dynamic operationfor physical reasons.Normal operation and EMERGENCYSTOPFault conditionDynamic sizingProject planning recommendationIn normal operation, using the holdingbrake for clamping of a standstill axis, the"static holding torque" (M4) - adhesive frictionapplies.In case of EMERGENCY STOP for the desactivationof an exis (n < 10 min -1 ), a"dynamic holding torque" (M dyn ) – slidingfriction is effective.Fig.9-22:M4 > M dynUnder a fault condition, using the holdingbrake for the desactivation of a moving axis(n ≥ 10 min -1 ), a "dynamic holding torque"(M dyn ) – sliding friction is effective.Therefore, note the following description of dynamic sizing.Dynamic sizingThe load torque must be smaller than the minimum dynamic torque M dyn whichthe holding brake can provide. Otherwise the dynamic holding brake torque isnot sufficient to stop the axes.If a mass is to be decelerated in a defined time or in a defined route, the additionalmass moment of inertia of the whole system must be taken into account.To ensure the system's safety, reduce the required holding torque to 60% ofthe static holding torque (M4) of the holding brake.9.11.5 Holding Brake–Commissioning and Maintenance InstructionsBefore initial commissioningIn order to ensure proper functioning of the holding brake, it must be checkedbefore the motors are installed.Measure the holding torque (M4) of the holding brake. If necessary, grind in theholding brake.Measure the holding torque (M4) of the holding brake1. De-energize the motor and secure it against re-energization.2. Measure the transferable holding torque (M4) of the holding brake with atorque wrench. Holding torque (M4) see "Technical Data".●●If the holding torque (M4) indicated is achieved, the motor is readyfor the assembly.If the holding torque (M4) indicated is not achieved, the subsequentgrinding process can be used to reconstitute the holding torque.Grinding in the holding brake1. At closed holding brake, turn the output shaft by hand, e.g. with the helpof a torque wrench, by about 5 revolutions.2. Measure the holding torque (M4).●If the holding torque (M4) indicated is achieved, the motor is readyfor the assembly.
Project Planning Manual | Rexroth MKE Synchronous Motors Electric Drivesand Controls| Bosch Rexroth AG 93/131Operating Conditions and Application Notes●If the specified holding torque (M4) is not attained after several grinding-inprocesses, the holding brake is not operable. Please consultRexroth Service.During operationA missing holding torque of holding brakes caused by tear and corrosion canlead to operational disturbances in machines and plants. For this case,IndraDrive control devices offer the advantage to control the efficiency of theholding brake at regular intervals. This brake test can be carried out e.g. in theframework of a preventive maintenance (see P-0-0541, C2100 Command holdingsystem check).In order to counteract to an unsufficient holding torque, there is also the possibilityto grind in the holding brakes:1. Realisation of the grinding-in routine IndraDrive "Reconstition of the holdingtorque" (see P-0-0544, C3900 Command grind in motor holdingbrake). A repeated realisation of the grinding-in routine is possible.2. Grinding-in routine due to superior control. Here, special control programsadapted to the machine and system concepts are required. If necessary,please contact your Bosch Rexroth distribution partner and discuss thegrinding-in parameters for your application.9.12 Acceptances and Authorizations9.12.1 Motors in EU VersionDeclaration of conformityCE symbolCertificate of conformity certifying the structure of and the compliance with theapplicable EN standards are available for all MKE motors. If necessary, thesecertificates of conformity can be requested from the responsible sales office.The CE symbol and Ex mark can be seen on the type plates of the MKE Motors.Ex markFig.9-23:CE symbolII 2G/D EEx d IIB T4IP6X T 135°CFig.9-24:9.12.2 Motors in UL VersionUL, CSA ListingEx markThe MKE motors listed below have been presented to the UL authorities "UnderwritersLaboratories Inc.®".●●●●MKE037BMKE047BMKE098BMKE118The motors are approved by the UL authority and are marked with the followingsymbolon the motor's name plate.
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