Hologic DISCOVERY A - Lower C-Arm FRUS

Discovery QDR Series Technical Manual
5-16
2. Loosen the three screws on the inner side of the right encoder just enough to
allow the center hub to turn.
3. Adjust the encoder by rotating the center hub until the 'Encoder Position' count
value on the monitor matches the 'Upper Left' count value.
4. Secure the three adjustment screws on the face of the encoder.
5. Return to Step 2 of the “MOTOR$TZ (Discovery A and SL only)” on page 3-33
to recalibrate at the new encoder setting.
Note: Upon recalibration, the 'Upper Right' and 'Upper Left' count values should
become virtually equal. If the 'Lower Left' and 'Lower Right' count values
differ by more than 20 counts, readjust the encoder by rotating the center
hub until the 'Encoder Position' count value equals the 'Upper Left' count
value ± half of the lower count difference. Secure the three adjustment
screws on the face of the encoder Return to Step 2 of the MOTOR$TZ
calibration procedure on page 3-33 to recalibrate at the new encoder
setting.
5.6 Lower C-Arm FRUS
This section describes how to remove and replace the C-arm Interface Board, X-Ray
Controller (XRC), Tank, and Filter Drum Assemblies located on the lower C-arm (see
Figure 5-7), and Arm rotation FRUs (A & SL only).
Table Status OK
Left Pedestal AT_TARGET
Right Pedestal AT_TARGET
Position 199649
PosLimitPosition 199930
NegLimitPosition 0
LowerLeft 384
UpperLeft 3235
LowerRight 383 Adjust the Right String
UpperRight 3234 Encoder center hub until
PositionAverage 8 EncoderPosition
DriverVersion 8.02 equals UpperLeft.
DeviceVersion 2.30
EncoderPosition 3230
EncoderNegLimit 383
EncoderPosLimit 3234
A384;3235;383;3234