To collapse the tripod (after removing the telescope) for storage, follow these
steps:
a. Loosen the tension knob and rotate the spreader bar 60° from its assembled
position, so that one spreader bar arm is located between each adjacent pair of
tripod legs.
b. Move the spreader bar to the top of the threaded rod. Tighten the tension knob,
locking the bar.
c. Working one leg at a time, gradually collapse the legs of the field tripod until the
tension hub is positioned onto the threaded rod. Use the second tension knob to
secure the tension hub in place.
Attaching the 16" Drive Base
a. Remove the three pointed bolts that hold the packing material in place. These bolts
are used only for shipping purposes and not used in the telescope assembly
procedure. See Fig. 49.
b. Rotate the field tripod so that one leg is pointing approximately South (it need not
point exactly South).
c. Position the 16" drive base onto the field tripod, with the power panel facing South.
Secure the drive base using the three 1/2"-13x1-1/2" long bolts. Thread these bolts
up through the underside of the tripod head into the drive base using the supplied
hex key. Firmly tighten these bolts. See Fig. 50.
c. Level the drive base by loosening the six lock-knobs (Fig. 46, 5) and sliding out the
inner tripod legs.
d. Note the DB-15 connector at the center of the base.
Attaching the Fork
a. Place the single-piece fork onto the top of the drive base. One side of the base of
the fork has a cutout to allow clearance for the R.A. lock (Pg. 7, Fig. 1, 12) and R.A.
slow-motion control (Fig. 1, 10), which are located on top of the drive base.
b. Bolt the fork to the drive base using the four 3/8"-16x3/4" long bolts (Fig. 51). Using
the supplied hex key, tighten to a firm feel only.
c. Unscrew and remove the four thumbscrews from the rectangular plate (Fig. 52)
in the center of the fork base. Remove the plate. Note the DB-15 plug under the
fork base.
d. Connect the DB-15 plug to the DB-15 connector underneath the plate. Tighten the
two thumbscrews onto the connector to a firm feel. See Fig. 53.
Mounting the Optical Tube Assembly (OTA)
This step requires two people who can lift up to 70 pounds each
(Note: See Caution
on page 65)
. The optical tube assembly (OTA) weighs about 125 lbs. and it must be
positioned accurately in order to mount to the fork.
a. Located on the two top surfaces of the fork are two shoulder bolts. These two bolts
function as locating pins for the OTA. On the inside edge of the Dec. castings are
two matching holes (with slots). Before trying to mount the OTA, be sure to locate
these two bolts and holes. Notice that the bolts and holes are located on one side
of the castings, requiring the OTA to be mounted one way only.
b. Tighten the Dec. lock (Fig. 1, 12) to a firm feel only. With you on one side of the
OTA and your assistant on the other side, grasp the two handles on each side and
lift the OTA onto the top of the fork. Position the holes over the shoulder bolts. When
they are in place, slide the OTA back so that the shoulder bolts lock into
the slots (Fig. 54).
c. Lock the OTA in place using the four 3/8"-16x3/4" bolts. Thread up the four bolts
into the bottom of the Dec. castings, two on each side. Using the supplied hex key,
tighten to a firm feel only (Fig. 55).
- 67 -
Fig. 50: Attach the drive base to the
tripod.
Fig. 51: Bolt the fork to the drive
base.
Fig. 52: Remove the for thumbscrews
from the plate.
Fig. 53: View beneath plate (fork base
not shown for clarity sake): Thread-in
the fifth bolt and attach the DB-15
connector underneath the plate.
DB-15
Connector
Connector
thumbscrew
