
48
Operating Instructions – AC Motors DR / DV / DT / DTE / DVE / Asynchrounos Servo Motors CT / CV
8
Inspection / maintenance for BMG05-8, BM15-62 brakes
Inspection / Maintenance
Change braking
torque of BMG05-
8, BM15-62
The braking torque can be changed in steps (
→
Sec. "Technical Data")
•
by installing different brake springs
•
by changing the number of brake springs
•
by changing the brake coil body:
– BMG05: if the maximum braking torque is not sufficient for the specific
application, install the brake coil body [12] of brake BMG1 of the same design to
ensure safe braking
– BMG2: if the maximum braking torque is not sufficient for the specific application,
install the brake coil body [12] of brake BMG4 of the same design to ensure safe
braking
1. Isolate the motor and brake from the supply, safeguarding them against unin-
tentional power-up
2. Remove the following:
– If installed, forced cooling fan, tacho/encoder (
→
Sec. "Preliminary work for motor
and brake maintenance")
– Flange or fan guard [21], circlip [20] and fan [19].
3. Remove the rubber sealing collar [5] and the manual brake release:
– Setting nuts [18], conical coil springs [17], studs [16], release lever [15], dowel pin
[14]
4. Unscrew hex nuts [10e], pull off the coil body [12].
– by approx. 50 mm (watch the brake cable!)
5. Change or add brake springs [11]
– Position the brake springs symmetrically
6. Re-install the brake components
– Except for the rubber sealing collar, fan and fan guard, set the working air gap (
→
Sec. "Inspecting brake BMG 05-8, BM 15-62", points 5 to 8)
7. With manual brake release: Use setting nuts to set the floating clearance "s" between
the conical coil springs (pressed flat) and the setting nuts (
→
following figure)
Important: The floating clearance "s" is necessary so that the pressure plate
can move up as the brake lining wears. Otherwise, reliable braking is not
guaranteed.
8. Install the rubber sealing collar back in place and re-install the dismantled parts.
Note
Install new setting nuts [18] and hexagon nuts [10e] if the removal procedure is repeat-
ed!
01111BXX
Brake
Floating clearance s [mm]
BMG05-1
1.5
BMG2-8
2
BM15-62
2
s