Hologic DISCOVERY A, Technical Manual

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Discovery QDR Series Technical Manual
3-42
The motor_direction, calibrate_position, pos_limit_position and
neg_limit_position fields have the same interpretation as discussed under
MOTOR$AY.
8. Type
Y<Enter>
to accept the calibration values or
N<Enter>
to reject them.
Note: The last calibration scan data is saved in the file MOTOR_TX.DAT. You
can reanalyze the data–e.g., after editing SQDRIVER.INI–by typing the
command
CALIBRATE @MOTOR_TX.DAT
at the MOTOR$TX>
prompt in SQDRIVER.
3.4.4.5 MOTOR$AR (Discovery A and SL)
1. Confirm that the table is level front-to-back. Do this by removing the table pad.
Place the digital level on the table at the foot end and read the value on the level.
It must be 0º degrees ±0.0º degrees. Move the level to the head of the table. Con-
firm that the level is still at 0.0º degrees. Adjust the leveling feet as necessary to
obtain this result. Failure to perform this step will result in positioning toler-
ance errors on whole body, lateral, and IVA scans.
2. Select the AR motor device driver by typing:
MOTOR$AR<Enter>
3. At the MOTOR$AR> prompt, type:
CALIBRATE<Enter>
The program prompts:
The program moves the TY and AY motors to their center positions, then moves
the TZ motor to its topmost position and prompts:
4. Remove the C-arm Tank cover.
5. Place the digital level on the top of the tank assembly (not on the top of the C-
arm) and use the Table IN/OUT switch on the operator panel to move the C-arm
until it is 0º ±0.0º
6. Remove the level.
7. Press
<Enter>
.
The program prompts:
Press <ESC> to stop calibration.
Use the Table IN / OUT switch to move the C-Arm to 0 degrees.
Press <Enter> when the C-Arm is positioned.
Press <ESC> to stop calibration.
Press <ESC> to stop calibration.