Celestron CGX Equatorial 800 HD Telescopes CGX EQ Mount and Tripod Manual - Page 22
R.A. East Limit
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maximum. Then by displaying the telescope's azimuth in this position (by looking at Get Axis Position under the Utilities menu) you can determine the telescope's azimuth at its most extended position. Enter this azimuth reading for either the maximum or minimum azimuth slew limit to ensure that the telescope will not slew beyond this point. The telescope slew limits can be set to automatically stop anywhere between 40° above level to 20° below level. To set the R.A. slew limit select the following: • R.A. East Limit - Enter a number between +40° to -20° to define the slew limit when the tube is on the east side of the mount. • R.A. West Limit - Enter a number between +40° to -20° to define the slew limit when the tube is on the west side of the mount. • Disable Limits - This disables any pre-defined values that have been entered and allows the mount to track the maximum amount pass the Meridian (i.e., -20° on both sides) Calibrate Mount - In order to optimize the performance and pointing accuracy of the telescope, the mount has built-in calibration routines allowing it to compensate for mechanical variation inherent in every German equatorial mount. Each calibration is completely automatic and in most cases only needs to be performed once. It is highly recommended that you take a few minutes to go through the mount calibration procedures. • R.A. Switch - This procedure records the offset error when the right ascension index mark is aligned at start-up. Calibrating the R.A. Index will improve the accuracy of your initial star alignments when aligning the telescope in the future. • GoTo Calibration - GoTo Calibration is a useful tool when attaching heavy visual or photographic accessories to the telescope. GoTo Calibration calculates the amount of distance and time it takes for the mount to complete its final slow GoTo when slewing to an object. Changing the balance of the telescope can prolong the time it takes to complete the final slew. GoTo Calibration takes into account any slight imbalances and changes the final GoTo distance to compensate. Home Position - The telescope's "home" position is a user-definable position that is used to store the telescope when not in use. The home position is useful when storing the telescope in a permanent observatory facility. By default the Home position is the same as the index position used when aligning the mount. WARNING: In order for the telescope to be able to slew to a star from the direction that minimizes the amount of backlash in the gears, it may be necessary for the telescope to slew beyond the specified slew limit in order to approach the star from the correct direction. This can limit your ability to slew to an object by as much as 6° from the R.A. slew limit set in the hand control. If this proves to be a problem, the direction that the telescope takes to center an object can be changed. To change the telescopes slewing direction, see GoTo Approach under the Scope Setup menu. Custom Rate 9 - This allows you to customize the speed at which the mount slews to a target. You can set the R.A. and Dec axes individually. Utilities Menu Scrolling through the MENU (9) options will also provide access to several advanced utility functions within the telescope such as; Calibrate Mount, Hibernate as well as many others. To set the Home position for your mount, simply use the arrow buttons on the hand control to move the telescope mount to the desired position. Select the Set option and press Enter. Select the GoTo option to slew the telescope back to the Home position at any time. Factory Settings - Returns the hand control to its original factory settings. Parameters such as backlash compensation values, initial date and time, longitude/latitude, along with slew and filter limits will be reset. However, stored parameters such as user defined objects will remain saved even when Factory Settings is selected. The hand control will ask you to press the "0" key before returning to the factory default setting. Version - Selecting this option will allow you to see the current version number of the hand control and motor control. The first set of numbers indicate the hand control software version. For the motor control, the hand control will display two sets of numbers; the first numbers are for azimuth and the second set are for altitude. Get Axis Position - Displays the relative altitude and azimuth for the current position of the telescope. 22 | ENGLISH