Orion SKYQUEST XX14I - Manual (Page 11)

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encoder disk so the registration feature on the bushing
goes into the hole in the encoder disk.
11. Carefully position the top baseplate (D) over the ground
baseplate (A) and lower it so the brass azimuth bushing
(F) goes through the center hole in the top baseplate
(Figure 11). When the top baseplate is resting on the
ground baseplate, the brass bushing should extend just
above the top surface of the top baseplate.
12. Place the remaining fender washer (H) onto the shaft of
the azimuth axis bolt (I), then thread the hex lock nut (L)
onto the end of the azimuth axis screw and tighten it fin-
ger tight, for now.
13. To tighten the hex lock nut (L) onto the azimuth axis bolt
(I), tilt the assembled Dobsonian base at a slight angle to
lift the ground baseplate off the ground. Remove the tape
covering the head of the azimuth axis bolt. Now, with one
wrench (or pliers) hold the head of the azimuth axis bolt
still while turning the hex lock nut with the other wrench.
Figure 12 shows this being done. Tighten the hex lock
nut just until the top fender washer can no longer move
freely, then tighten the hex nut 3/16 to 1/4 turn beyond
that. This provides the proper spacing between the azi-
muth encoder disk and the azimuth encoder board.
14. Two altitude bearing cylinders (R) connect to the interior
surface of each side panel (C). Line up one of the alti-
tude bearing cylinders with one of the two through holes
in each side panel. The beveled end of the cylinder should
be facing away from the side panel. Push a bearing cyl-
inder screw through the side panel and thread it into the
built-in nut in the cylinder with the included 4mm hex key
(Figure 13). Repeat this for the remaining three bearing
cylinders.
15. Attach the encoder connector board to the side panel.
Place a wood screw into each of the four holes of the
connector board and then an encoder connector board
washer onto each screw. Then lightly press the screw tips
into the four predrilled holes in the side panel so that the
modular jack fits into the rectangular cutout. This is tricky
Figure 11. Lower the top baseplate onto the ground baseplate.
The brass bushing should pass through the center hole in the top
baseplate (and the large hole in the azimuth encoder board).
Figure 10. Placing a piece of duct, masking, or packing tape
over the hex head of the azimuth axis bolt will keep it from dropping
downward when you place the top baseplate onto the ground
baseplate.
Figure 12. To connect the baseplates, tilt them only slightly, as
shown. Do not place them on their side. Use one wrench (or pliers)
to hold the hex head of the azimuth axis bolt steady while turning the
hex lock nut with another wrench.
Figure 13. Push a bearing cylinder screw through the side panel
and thread it into the altitude bearing cylinder. The beveled end of
the cylinder should be farthest from the side panel.
Azimuth encoder
board
Brass azimuth
bushing
Encoder disc
Ground baseplate
Top baseplate
Altitude
bearing
cylinder
Altitude bearing
cylinder screw