C-arm rotation brake
MAMMOMAT Balance SPB7-115.840.01 Page 53 of 62 Siemens AG
Troubleshooting Guide Rev.02 10.04 Medical Solutions
C-arm Rotation brake
C-arm rotation brake is made of a disk brake.
Disk brake caliper is operated by means of motor with gear box 08883659.
Brake locked unlocked positions are detected by means of MW5 and MW6, 08883782
microswitches.
LOCKED UNLOCKED
MW5 CN32 PCB 03-188 pin 2 +5 Vdc 0 Vdc
MW6 CN32 PCB 03-188 pin 3 0 Vdc +5 Vdc
Motor MT3 is connected to CN21 PCB 03-188
Cable CV0161 connects Motor and microswitches to PCB 03-188
If sensing microswitches are defective, motor turns continuously and lock unlock function doesn’t
work properly.
For easy static investigation of brake problems, DIP1 of SW2 is provided to disable C-arm motor.
SW2
DIP1 = ON C-arm Brake, disabled for service
Brake force adjustment
Brake force is adjusted increasing decreasing distance between the two white plastic parts A / B
connected by means of screw C.
Partially unscrew the little screw D that stays on the side of the cylinder, and totally screw E.
Turn part B as necessary, reassemble parts and check for effect on brake force.
When finished tighten screw D and C.
D
A
B
C
MW6
MW5
CALIPER
E
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