Orion 10026 XT6i Instruction Manual page 5

Figure 1.5.
Thread the collimation thumbnuts, with nylon
washers attached, through the rear end ring and onto the
threaded shafts. Make sure the thumbnuts have at least three full
turns of engagement on the shafts.
Next, assemble the rear end ring to the mirror cell. Find a
clean, flat surface, and turn the mirror cell over so that the
mirror is facing downwards. Place the three springs onto the
three exposed threaded shafts (Figure 1.3). Lower the end
ring onto the mirror cell so the threaded shafts pass through
it, and the end ring rests on the springs (Figure 1.4). Add
a nylon washer to each collimation knob and thread the col-
limation knobs through the end ring and onto the threaded
shafts (Figure 1.5). Make sure the knobs have at least three
full turns of engagement on the shafts. The mirror cell is now
ready to be installed into the tube.
Assembling the SkyQuest XT12i IntelliScope mirror cell to the
tube can be a bit tricky. This is because the large diameter
and thin aluminum of the tube will cause the tube to become
somewhat out of round once the rear end ring is removed.
To assemble the mirror cell to the tube, stand the tube up
vertically so that the raw edge of the tube is facing upward.
Line up the threaded holes in the edge of the mirror cell end
ring with the holes in the end of the tube. Then, lower the
mirror cell onto the tube so that one side of the end ring is
fully seated onto the tube (Figure 1.6). Now, look along the
perimeter of the tube, and you will notice a bulge in the tube
that prevents the mirror cell from fully seating on the tube
(Figure 1.7). Position your body so that your chest is pressing
against this bulge, and hug the telescope with your left hand
so that the tube becomes round. With your right hand, gently
tap down the side of the mirror cell that needs to be seated,
and the entire mirror cell should seat onto the tube (Figure
1.8). Then replace the Phillips-head screws that connect the
rear end ring to the tube.
Figure 1.6.
Lower the assembled mirror cell onto the tube so
one side of the end ring is seated on the tube edge. The threaded
attachment holes in the end ring should also be lined up with the
through holes in the end of the tube.
Figure 1.7.
Locate the area of tube that is bulging out and
preventing the mirror cell from fully seating.
Figure 1.8.
Hug the tube so that your chest pushes against the
bulge, and a gentle tap should fully seat the mirror cell onto the
tube.
5