Gemini-2 and Gemini-1 Telescope Mount Controllers
Website and Tutorials by Thomas Hilton
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This routine is designed to help get the mount polar aligned to within one degree of either the north or south pole. This routine will take at least 3 iterations to get as close as a polar scope can get you. YOU CANNOT HAVE A MODEL BUILT AND EXPECT THIS ROUTINE TO WORK.  Do it after doing a cold start.
  1. It is very important that you do as accurate  a Counter-Weight-Down, and Pointing the Dec to the pole as you can before powering on the Gemini-2.  This will help this alignment be more accurate.
  2. After you have cold started select "Menu"--> "Align -->more.. -->Polar Align Assist" menu item.
  3. You will be in the menu of Choose First Star, Choose Second star and Iterate, as shown on the left.
  4. You will need to select 2 stars for this alignment process. The first one should be near the celestial equator (Dec. near 0) and within about 20° of the eastern or western horizon (about + or - six hours east or west). The other star should be near the intersection of the Celestial Equator  and the meridian (such as Polaris in the northern hemisphere).
  5. Use the UP and Down buttons to scroll through the list of stars and select the first one by using the selecting it. Once again the Gemini-2 will display the Choose first star, Choose Second Star.
  1. Choose the second star and select a star from the menu of stars. Scroll through the list and select the second star. The menu will again return to the Choose First Star, Choose Second star and Iterate menu.
  2. Select the Iterate button and the mount will slew to the first star. Once it reaches the star, "center object" will appear on the display. If the star is the one near the meridian, center the star only using the mount's AZ adjustment knob (ignore EL). If it is in the western or eastern part of the sky, center the star using only the mount's EL adjustment knob (ignore AZ).
  3. Press the Iterate button and the telescope will slew to the other star. Center it using the procedure described above. Repeat this about 3 times, each time pressing the Iterate button to slew back and forth between the two stars. When you are finished, press the Back button.
  4. You can expect to get to within one degree of the pole using this method. IMPORTANT: Because this method depends on the mount pointing to where the stars should be if the mount were polar aligned, you cannot use this function if modeling parameters have already been calculated. You should only use it after a Cold Start before you do any Alignments, or immediately after selecting the "Reset Alignment" menu item.
  5. Lets get started, Hit Choose First Star.
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