GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A021 - Arm Rotation Calibration
Page no. 1679
Chapter 9
JC-CAL-A-021.fm
Job Card CAL A021 - Arm Rotation Calibration
Chapter 9
1
SUPPLIES
None
2
TOOLS
3
REQUIRED EFFORT
Personnel: 1 Field Engineer
Time: 20 minutes
4
SAFETY PRECAUTIONS
None
5
PREREQUISITES
None
6
PROCEDURE
Note:
The compression arm angle must be calibrated to allow automatic selection of view names
.
Note:
The sign convention for Senographe applications is illustrated here, shown
looking at the tube head or chest wall of the Senographe.
6-1
Principle
•
Arm rotation travel limits are factory set; However, if parts have been replaced or disturbed which
affect the software or hardware limits, calibration must be carried out.
•
Calibration is necessary to set travel limits in software, defining the maximum positive and negative
usable angles.
-
The procedure first calibrates the 0° position to establish a reference point for the measurement
system (potentiometer and encoder).
-
Travel limits are then set at the 185° and -165° positions
•
Optical sensors ("optical forks") are used to recognize and stop any movement beyond the software
limits, before impact with mechanical stops.
6-2
Calibration procedure
•
Move the lift to a height which will allow rotation of the arm between 185° and -165°.
•
Select the Rotation Calibration on the ADS LCD screen:
Service Desktop/Calibration/Positioner/
Rotation
.
•
You are asked to follow the instructions displayed on the Gantry readout:
0°
180°
+
-
