Proceed as follows: 1. De-energize the motor and secure it against re-energization. 2. Measure the transmittable holding torque of the holding brake using a torque spanner. The holding torque of the brakes is specified in the data sheets. 3. If the holding torque specified in the data sheets is reached, the holding brake is ready for operation. If the holding torque specified in the data sheets fails to be reached, the holding brake must be ground in as described in step 4. 4. Grinding in: With the holding brake closed, manually turn the output shaft by approx. five revolutions and measure the transmittable holding torque of the brake using a torque spanner.
During operation
If holding brakes are required only sporadically (braking cycle >48 h) during operation, film rust may develop on the brake friction surface. To prevent the holding torque specified from being fallen below, we recommend to proceed as described below:The option of automatically implementing the grinding-in routine in the program run is described in the documentation of the particular drive controllers. During normal operation, it is not necessary to grind in the brake. It is sufficient if the brake is activated twice a day by removing the controller enable signal.
Changing the battery
Drive control systems of Rexroth observe voltage of battery safely and give just in time a warning “change battery”. Changing the battery should be made, when machine is under load. This is necessary to avoid an overrun in the motor encoder (switch off control voltage can cause loss of absolute values). Following tools and spare parts are needed: • Screw driver Torx according to Fig. 16-2 • Needle-nosed pliers • Torque spanner with setting range 1.3-6.8 Nm. • New, assembled battery for
Common problem
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