1. Introduction
This manual provides comprehensive instructions for the setup, operation, and maintenance of your iOptron GEM28 German Equatorial Mount head with integrated iPolar. The GEM28 is designed for portability and precision, offering advanced GoTo technology for astronomical observation and astrophotography.
2. Safety Information
- Always handle the mount with care to prevent damage.
- Ensure all components are securely fastened before operation.
- Do not exceed the maximum payload capacity of 28 lbs (12.7 kg).
- Keep electronic components dry and away from extreme temperatures.
- Avoid looking directly at the sun through any optical instrument without proper solar filters.
3. Package Contents
The iOptron GEM28 package includes the following items:
- GEM28 mount with built-in iPolar and WiFi
- Hard case
- Counterweight
- Power adapter
- Go2Nova Hand Controller
Note: A tripod is optional and sold separately.
Figure 1: The iOptron GEM28 German Equatorial Mount head, showcasing its compact design and key components.
Figure 2: The iOptron GEM28 mount and accessories securely packed within its protective hard case.
4. Setup
4.1 Mounting the GEM28
Place the GEM28 mount head onto a compatible tripod (sold separately). Ensure the mount is level and securely attached using the central mounting screw. Verify that the mount is stable before proceeding.
4.2 Counterweight Installation
Slide the counterweight onto the counterweight shaft. Adjust its position to balance your telescope payload. Secure the counterweight with its locking knob. Proper balancing is crucial for smooth tracking and motor longevity.
4.3 Power Connection
Connect the provided power adapter to the mount's power input port. Ensure a stable power source is used. Avoid using unapproved power supplies to prevent damage.
4.4 iPolar Alignment
The GEM28 features an integrated iPolar electronic polar scope. Refer to the iPolar software instructions for precise polar alignment. This system assists in accurate alignment even when the pole star is not visible, making setup easier in various observing conditions.
5. Operating
5.1 Go2Nova Hand Controller
The Go2Nova Hand Controller provides access to the mount's functions. Use the directional buttons to navigate menus and select options. The 4-line LCD screen displays status and object information, guiding you through operations.
5.2 Star Alignment
After polar alignment, perform a star alignment using the hand controller. This calibrates the mount's GoTo system for accurate pointing across the sky. Follow the on-screen prompts for selecting alignment stars.
5.3 GoTo and Tracking
Select celestial objects from the 212,000 object library using the hand controller. The mount will automatically slew to the target and track its movement across the sky, compensating for Earth's rotation.
5.4 Wi-Fi Connectivity
The built-in Wi-Fi allows for wireless control and communication with compatible devices and software. Refer to the iOptron website for details on compatible applications and connection procedures.
5.5 Permanent Periodic Error Correction (PPEC)
The mount supports Permanent Periodic Error Correction (PPEC). This feature allows recording and replaying optimal PEC training sessions to improve tracking accuracy, which is particularly beneficial for long-exposure astrophotography.
6. Maintenance
6.1 Cleaning
Wipe the mount's exterior with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials. Keep optical surfaces of the iPolar clean using appropriate lens cleaning solutions and cloths.
6.2 Storage
When not in use, store the GEM28 in its hard case in a dry, dust-free environment. Protect it from extreme temperatures and humidity to prolong its lifespan.
6.3 Firmware Updates
Periodically check the iOptron website for firmware updates. Follow the provided instructions for updating the mount's firmware to ensure optimal performance and access to new features.
7. Troubleshooting
- Mount not powering on: Check power connections and power supply. Ensure the power adapter is correctly inserted and the power source is active.
- GoTo accuracy issues: Verify polar alignment and perform a thorough star alignment. Ensure the mount is balanced and the correct time and location are set in the hand controller.
- Tracking errors: Check for proper balancing and ensure PPEC is enabled if previously trained. Verify polar alignment. Environmental factors like wind can also affect tracking.
- Hand controller not responding: Ensure the hand controller cable is securely connected. Try restarting the mount.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | iOptron |
| Model Number | G282A1 |
| Item Weight | 10 pounds (4.5 kg) |
| Payload Capacity | 28 pounds (12.7 kg) |
| Material | Metal |
| Tripod Head Type | German Equatorial Mount (GEM) Head |
| Special Features | Built-in Wi-Fi, Electronic Polar Scope (iPolar) |
| GoTo Object Library | 212,000 objects |
9. Warranty Information
The iOptron GEM28 mount comes with a one-year standard warranty from the date of purchase. This warranty covers manufacturing defects and workmanship under normal use. Please retain your proof of purchase for all warranty claims. The warranty does not cover damage caused by misuse, accidents, or unauthorized modifications.
10. Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please visit the official iOptron website or contact their customer support directly. Product documentation, software downloads, and frequently asked questions are also available online.
iOptron Official Website: www.ioptron.com
