Section 3 - Installation
3-23
CHECK BELT TENSION
Check for proper tension on each of the motor drive belts. If any belt is loose, perform the
tension adjustment for that belt in
Section 5, Remove and Replace Procedure
of this manual.
ADJUST C-ARM Y BELT
The C-Arm Y belt should always be adjusted during installation. To do this, perform the
following:
1.
Move the C-Arm to the center of the table.
CAUTION:
Do not move the C-arm or the table more than 1"/second with the power off.
2.
Turn off the QDR 4500 instrument power, computer power, and main circuit
breaker.
3.
Loosen the two mounting bolts holding the tension block.
4.
Adjust the tension nut so that the spring is compressed to 7/8 inch.
5.
Tighten the two mounting bolts holding the tension block.
CALIBRATE MOTORS
The SQDRIVER program provides a CALIBRATE command for each of the motors (TZ, AY,
TY, TX and AR) to calibrate the encoder read back and determine the limits of motion.
Perform the
Motor Calibration
procedure in the
ALIGNMENT AND CALIBRATION
section of
this manual.
Note:
During Installation, the MOTOR$AY, MOTOR$TY, MOTOR$TX and MOTOR$AR
procedures may be performed without unclasping the drive shaft tubing (this allows the
procedure to be completed quicker). This applies
only
during installation.
CHECK X-RAY BEAM ALIGNMENT
It is crucial that the X-ray beam be precisely aligned with the detector, as improper alignment
directly affects the repeatability (coefficient of variability, or CV) of the QDR 4500.
To check beam alignment, perform the
X-Ray Beam Alignment
procedure in the
ALIGNMENT
AND CALIBRATION
section of this manual.
CALIBRATE APERTURE (QDR 4500A AND SL)
Note:
If the table cannot be moved from the Control Panel it may be necessary to exit to DOS
and type: TOAP <Enter>. This sets the arm and table to the AP position.
This procedure identifies the exact positions of each aperture (slit) in the encoder unit.
1.
Center and lower the table.
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