iOptron IEQ75-GTTM Align, Set Language, Heating Controller, Upgrade Firmware, Firmware Version

If the Meridian Protection is turned on, the mount will stop tracking when it passes the meridian. If it is turned off, the mount will keeping tracking and the OTA could hit the tripod leg if the mount is not monitored.

5.4.11.Set Language

Select hand controller language from English or French.

5.4.12.Heating Controller

Turn on/off the controller internal heater.

5.4.13. Upgrade Firmware

Use this operation to upgrade 8406 hand controller firmware and iEQ75-GT main control board firmware. Please refer to Appendix C. Firmware Upgrade for details.

5.4.14. Firmware Version

Will display hand controller firmware version.

5.4.15. Set Speed Limit

You can select the GOTO speed to be 128X, 256X, 512X, or MAX. The slower the speed, the quieter the motors run.

5.5. Align

This function is used for aligning the telescope. The system provides two alignment methods: “One Star Align” and “Two Star Align” The mount has to be at Zero Position before any star alignment.

5.5.1. One-Star Align

Press MENU button and select “Align”. Select “One Star Align” and press ENTER. A list of alignment stars that are above the horizon is computed based on your local time and location. With the mount at the “Zero Position,” use ▲ and ▼ buttons to select a star and press ENTER. Center the target in your eyepiece using arrow key. Press ENTER when finished. If your mount is well set up and polar aligned, one star alignment should be sufficient for good GOTO accuracy. To increase the accuracy you may choose to do two star alignment.

5.5.2. Two-Star Align

Two star alignment will increase the GOTO accuracy of the mount. Two star alignment requires a wider view of the sky, since the two align stars need to be far apart. Press MENU button and select “Align”. Select “Two Star Align” in the align menu. A list of alignment stars that are above the horizon is computed based on your local time and location. With the mount is at the “Zero Position,” use ▲ and ▼ buttons to select first alignment star and press ENTER. Center the target in your eyepiece using arrow key. Press ENTER when finished. The hand controller will prompt you to choose the second star. If the star you choose is too close to the first one, the system will let you choose another one. When you are aligned with the second star, the two star alignment is finished. You can reject the suggested star if it is blocked by a tree or other obstruction.

After the two-star alignment, a pointing error between the R.A. axis and the polar axis will be recorded. This number can be used to fine tune the R.A. axis.

“Two Star Align” results will be overridden if “One Star Align” or “Sync. to Target” is performed after “Two Star Align.”

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