Altitude

bearings

Bearing cylinders

Figure 9. Lift the optical tube and place it into the Dobsonian base so that the altitude bearings rest on the bearing cylinders. Orient the optical tube as shown. Do not bump the encoder connector board or vertical stop when installing the optical tube.

To install the XT system, follow these steps while referring to Figures 10 and 11:

1.Select one of the retaining/tensioning knobs and slide the metal washer onto the shaft, followed by the white nylon washer (you will need to thread this washer onto the shaft). This knob will now be known as the tensioning knob. Push the shaft of the tensioning knob through the hole in the left side panel (the one that has the IntellisScope port) (Figure 10). Thread the knob into the altitude bearing until

Figure 10. The tensioning knob, with the metal and nylon washers, goes on the left side of the base, just above the IntelliScope port. The tensioning knob should be tightened until the CorrecTension pads just touch the telescope’s altitude bearing.

Figure 11. The retaining knob on the right side of the base is inserted though the aluminum shaft of the altitude encoder assembly.

the CorrecTension pads on the interior surface of the side panel just touch the altitude bearing on the optical tube.

2.Thread the other retaining/tensioning knob, which we’ll now refer to as just the retaining knob, through the altitude encoder’s aluminum shaft and thread it into the optical tube’s right side bearing (Figure 11). Make sure this knob is fully tightened.

Note: Only the left side panel has a white nylon bushing in the hole for the tensioning knob. The right side panel does not require this bushing.

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Orion 10020 XT12i, 10026 XT6i, 10018 XT8i, 10019 XT10i instruction manual Altitude Bearings Bearing cylinders
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10019 XT10i, 10018 XT8i, 10020 XT12i, 10026 XT6i specifications

The Orion XT series of telescopes, including the XT12i, XT8i, XT6i, and XT10i, are highly regarded for their quality and performance, making them popular choices among astronomy enthusiasts. Each model in the XT line features a Dobsonian design, renowned for its simplicity and ease of use, allowing users to enjoy stargazing without the complexities associated with other types of telescopes.

Starting with the Orion XT12i, this model boasts a 12-inch aperture that delivers exceptional light-gathering power, ideal for deep-sky observations. Equipped with the IntelliScope computer navigation system, users can enjoy the convenience of locating over 14,000 celestial objects with ease. The oversized 2-inch focuser accommodates a range of eyepieces and accessories, while the solid, sturdy base ensures stability during observation.

Next is the Orion XT10i, featuring a 10-inch aperture designed for delivering stunning views of galaxies, nebulae, and star clusters. Like its larger counterpart, the XT10i also comes with the IntelliScope system, allowing for simple object location. Its compact design makes it an ideal choice for both backyard astronomy and portable stargazing trips. The XT10i includes a rich set of accessories, including a 1.25-inch eyepiece, to enhance the observing experience.

The Orion XT8i brings a 8-inch aperture to those seeking a balance between performance and portability. This telescope offers impressive light-gathering capabilities while remaining lightweight enough for easy transport. The IntelliScope feature enables users to navigate easily between celestial objects. It is an excellent choice for both beginners and experienced users looking for a versatile telescope.

Finally, the Orion XT6i features a 6-inch aperture, making it an optimal choice for those new to astronomy. Despite its smaller size, the XT6i still offers excellent views of the night sky and is highly portable. With the IntelliScope system, users can quickly find and explore various celestial objects. Its user-friendly design and setup make it a perfect introduction to the world of astronomy for novices.

In summary, the Orion XT series of telescopes presents a diverse range of options suitable for astronomers of all experience levels. They combine innovative technologies like the IntelliScope navigation system with solid construction and impressive optics, ensuring memorable astronomical experiences. Whether you're delving into deep-sky exploration or enjoying casual stargazing, the XT line has a model that fits your needs.
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