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Ortho Model
The Ortho routine uses the stars in the keypad to compensate for telescope non-orthogonality. It is an automatic routine
that simply requires the user to start it going and to center the star at the keypad prompt. The Ortho model can be used by
itself or in conjunction with the pointing model to form an all-sky model.
1. Go to the Tools Menu window (Main Menu > 3=Tools)
2. Press 3=Ortho Model and the keypad will scan the database and display the name of a star within one hour of the
meridian line. You can either press GoTo or send the scope to that star or use < or > butons to select another star from
the keypad database and press GoTo.
3. Once the scope has reached the star’s position, center it in your crosshair (eyepiece or digital image on your computer
window) and press ENT. Use button 6 to set the appropriate button rate.
4.
The mount will flip sides and do a safety slew to pick up the star on the opposite side.
5. Simply center the star again and press ENT.
6. The window will show the orthogonal error and the GTOCP5 will apply this every time you switch sides.
7. To activate, return to the Main Menu and toggle button 8 to read 8=ModOn.:
Track Status
When you are in the main menu, press the ENT button to view the RA and Dec trim
rates that are being applied to your track rate based on the model you created. You
must have activated the model in order to see the numbers (Main Menu > 8=ModOn.
