Orion SkyQuest XX12 Intelliscope Truss Tube Dobsonian 9793 Instruction Manual page 13

Lower
tube
section
Figure 21.
The clamping knobs on the ends of the truss pole
assemblies thread into the holes in the lower truss support ring on
the lower tube section.
lower optical tube section (Figure 21). This is done by sim-
ply threading the knobs into the holes in the ring. Do not
completely tighten these knobs just yet.
6. Connect the upper tube section to the four truss connec-
tors at the top of the poles. Orient the upper tube sec-
tion as shown in Figure 22. Hold the upper tube section
with one hand while threading the knobs in the truss con-
nectors into the holes in the upper truss support ring. If
necessary, you can slightly adjust the position of the truss
connector with respect to the pole ends in order to have
the knobs and holes line up (Figure 23). When tightened,
the knob will clamp the truss connector against the reg-
istration flats on the upper truss support ring (Figure 24).
Repeat this for the other three truss connectors. Firmly
tighten the knobs.
7. Firmly tighten the eight clamping knobs into the lower
truss support ring.
8. If, after assembling, the truss poles are loose within the
truss connectors, use the supplied 4mm hex key to tight-
en the button head cap screws which connect the poles
Truss pole
assembly
Clamping
knobs
Lower
truss
support
ring
Upper
tube
section
Truss
connectors
(4x)
Upper
truss
support
ring
Lower
tube
section
Figure 22.
When the optical tube is assembled, the upper tube
section should be oriented relative to the lower tube section as
shown. Note the orientation of the nameplate label on the upper
tube section relative to the Orion logo on the lower tube section.
Nameplate label
Truss pole
assemblies
(4x)
Orion
logo
13