Hologic DISCOVERY A, Technical Manual

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Discovery QDR Series Technical Manual
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secure the brackets to the pedestal. Refer to Remove Tabletop on page 3-9
for table removal procedures.
If the screws are loose, apply a small amount of Loctite to the threads and tighten
the screws.
The upper and lower brackets are attached to the pedestal with four, 6mm flat-
head Allen screws. While the table is off, it is a good idea to remove the pedestal
to make sure that these screws are tight as well.
To change the “A” dimension, do the following:
6. Mount the pedestal to the lower frame. Do not tighten the bolts until the align-
ment has been completed.
7. Install the table and check its alignment. Make the necessary adjustments, then
tighten the upper and lower bolts.
8. Install the pedestal covers that were removed in Step 1.
3.3.5.3 Front to Back T-Rail and Table Edge/Rail Gap Adjustment
To adjust the front-to-back T-Rail dimensions and table edge-to-rail gap, perform the
following procedure:
1. Remove the outer and inner covers from the left pedestal.
2. Loosen the four bolts fastening the top of the pedestal and the four bolts fastening
the bottom of the pedestal.
Note: Before adjusting the distance between the rails, make sure the upper and
lower brackets are securely fastened to the pedestal. Refer to Steps 3 -5 of
the previous (Aligning Table) section and then go to the next step.
3. Adjust the distance between the T-rails and the table edge-to-rail gap and tighten
the bolts.
4. Install the pedestal covers that were removed in Step 1.
3.3.6 Perform C-Arm Parallelism Adjustment (A and SL sys-
tems only)
1. Using a digital level and with the Tank cover removed, measure the angle across
the tank and from back to front on the Tank. Record the angles.
2. Remove the upper C-Arm covers and repeat the measurements on the upper C-
Arm assembly. Again record the angles.
3. If the angles measured on the tank vary by more than 0.0 degrees from those
found on the C-Arm, do the following.
4. Rotate the C-Arm until the center of gravity for the upper C-Arm is over the
lower C-Arm (approximately 60 degrees rotated).
5. Loosen eight 1/4" bolts (4 on each side).