24 | Assembly and Installation
7. Position the turntable as close as possible to the center. Attach the
measuring bar to the brass spacers mounted onto the bearing; the
hole-mount locations are appropriate to the size of the turntable to be
installed.
Rotate the bearing and make sure approximately
7/8 in to 1 in spacing
exists between the edge of the outer measuring bar and the diameter of
hole cut into the pit. Adjust if necessary.
8. Once the center is located, mark around the perimeter of the
turntable base or outer floor plates. These marks may be used for
reference if the assembly moves during placement of the floor shims or
anchor plates.
When installing and positioning the turntable on modular shielding, make as
many anchor holes miss the floor joint strips as possible; use the shim plates
provided.
9. The Model 2188 Turntable includes curved floor anchor plates that are
under the base unit. The 1.5-m and 2.0-m models include an outer ring
of floor plates to support additional casters.
To ensure proper spacing, place the four connector strips (included)
between the base unit and outer plates. For placement and securing of
floor plates, see the Pit Locator Detail illustration on page 23 and the
drawings located in the back pocket of this manual.
If the turntable is to be installed into a welded chamber with a steel pit
and steel raised floor, see step 13.
10. The anchor plates are held in place by 1/4–20 screws and set collars.
Screw the anchor plates to the floor using #14x1-in #3 square socket
flat-head screws. Drill
1/8 in pilot holes for these screws and vacuum up
shavings so that you have good contact with the floor. Continue
mounting the rest of the plates.
11. Once all anchor plates are securely mounted, remove and discard the
1/4–20 screws that hold the anchor plates to the base.
12. Level the turntable to the raised floor.
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