Rotate the DEC axis to horizontal position. Adjust the CW position to balance the mount in R.A. axis (Figure 14a) and move the OTA position to balance the mount along DEC axis (Figure 14b).

(a)

(b)

Figure 14. Balance along R.A. axis (a) and DEC axis (b)

CAUTION: The balance process MUST be done with Gear Switch at OPEN position! Otherwise it might damage the worm system.

Return the mount to Zero Position after balance, i.e. the CW shaft points to ground and telescope is at the highest position.

Turn Gear Switch Knob by 90° to LOCK position to re-engage the worm to the worm wheel. Retighten the Tension Adjuster as the last step to lock the gear.

Important Notes on Tension Adjusters

The rule of thumb is to fully screw in the Tension Adjuster and then back out by about 2 turns. The optimum spot varies with actual conditions, but is mostly within 1-3 turns from the fully tightened position. Ideally, it should be at a position just deep enough to rid any free movements (plays), while force on the worm assembly is kept at a minimum.

STEP 8. Connect Cables

Connect DEC unit to the main control unit with a short, straight RJ11 cable. Connect the Go2Nova® 8408 hand controller to the HC port on the main unit. Plug 12V DC power supply into the POWER socket. The power indicator on the main unit will be on when the power switch is turned on.

STEP 9. Setup Hand Controller

The ZEQ25 is equipped with a GPS receiver, which will receive the time, longitude and latitude information from satellites after the link is established. However, there are still some parameters need to be entered to reflect your location, such as time zone info and daylight saving time. The information will be stored inside the hand controller memory along with longitude and latitude coordinates until they need to be changed.

A clear sky and open space outside is needed for the GPS to establish its link with the satellites. The GPS is installed inside main control board compartment. If it has difficulty to receive the GPS signal, you may turn the mount head 90º to the side of the mount to clear the space on top of the main board.

Figure 15. Rotate mount head 90º to

clear the space for GPS receiver

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iOptron ZEQ25GT instruction manual Important Notes on Tension Adjusters, Connect Cables, Setup Hand Controller
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ZEQ25GT specifications

The iOptron ZEQ25GT is a highly regarded telescope mount that integrates advanced technologies and user-friendly features, making it a top choice for both amateur astronomers and seasoned stargazers. Its design focuses on portability, versatility, and precision, which are essential for anyone looking to explore the night sky.

One of the standout characteristics of the ZEQ25GT is its exceptionally lightweight and compact design. Weighing just 27 pounds, it is one of the lightest mounts in its class, allowing for easy transport and setup at various observing locations. Despite its lightweight form, the mount supports a significant payload capacity of up to 28 pounds, allowing users to attach a variety of telescopes and imaging equipment.

The mount's innovative design incorporates a unique "Hybrid" mount architecture, which combines features of both German and fork mounts. This enables a more streamlined setup and better balance during observation sessions. Additionally, the ZEQ25GT employs a patented design where the counterweight shaft is positioned above the mount. This design eliminates the need for a long counterweight bar, further enhancing portability and reducing setup time.

In terms of technology, the ZEQ25GT features iOptron’s renowned GoTo system, which provides users with access to a database of over 200,000 celestial objects. The system is equipped with dual-axis tracking and ultra-quiet servo motors, ensuring smooth and precise movement when tracking celestial objects. The built-in GPS allows for quick and accurate location setup, making it easy for users to begin their astronomical adventures with minimal delay.

Moreover, the ZEQ25GT includes an innovative SmartStar technology, enabling automatic alignment and calibration. This feature is particularly beneficial for newcomers, as it simplifies the setup process and reduces the learning curve associated with equatorial mounts. Users can control the mount via a hand controller or through a computer interface using iOptron's iControl app for smart devices, offering additional flexibility and convenience.

Durability is another important aspect of the ZEQ25GT, constructed from high-quality materials that ensure longevity and reliability. Its solid aluminum body not only contributes to its lightweight nature but also assures stability during use, which is crucial for astrophotography and high-magnification observations.

In conclusion, the iOptron ZEQ25GT is a cutting-edge telescope mount that combines portability, advanced technology, and user-friendly features, making it an excellent choice for astronomers at all levels. Its innovative design, robust performance, and ease of use truly set it apart in the competitive landscape of astronomical equipment.
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