SEW-Eurodrive DR 315 Series, Руководство по эксплуатации

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7
Inspection/maintenance
Inspection/maintenance work diagnostic unit /DUB
Operating Instructions – AC Motors
176
7.7.3 Inspection/maintenance work at the /DUB diagnostic unit with microswitch for function
monitoring
1. Check the working air gap according to chapter "Setting the working air gap of
BE05 – BE122 brakes" (→
2
160) and adjust it if necessary.
2. Screw the hex head screw [560] against the actuator of the microswitch [555] until
it trips (brown, blue contacts closed).
While screwing, install hex nut [561] to eliminate the longitudinal play from the
thread.
3. Turn the hex head screw [560] back until the microswitch [555] switches back
(contacts brown-blue open). Depending on the brake size, screw out the hex head
screw [560] by the specified angle to set the switching hysteresis.
Brake Angle
BE2, BE5, BE11, BE20, BE30, BE60 60°
BE32, BE62 90°
BE120, BE122 105°
• After reaching the respective end position, tighten the hex nut [561] against the
bolts [557]/[945] while holding the hex head screw [560] to keep it in the correct
position.
• Switch the brake on and off several times. Check whether the microswitch opens
and closes reliably in any motor shaft position. Therefore, change the position of
the motor shaft manually several times. In case of incorrect switching, the setting
procedure may require to be repeated.
• Check if the cables are routed firmly and if they require additional fastening in form
of cable ties [1109]. Make sure the cables are routed in a sufficient distance to the
fan wheel of the motor.
• Install the previously removed motor parts again.
25851535/EN – 02/2019