Celestron CGE925, CGE1100, CGE800, CGE1400 manual Moving the Telescope Manually, Adjusting the Mount

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Moving the Telescope Manually

In order to properly balance your telescope, you will need to move your telescope manually at various portions of the sky to observe different objects. To make rough adjustments, loosen the R.A. and DEC clutch knobs slightly and move the telescope in the desired direction.

Both the R.A. and DEC axis have two knobs to clutch down each axis of the telescope. To loosen the clutches on the telescope, rotate the clutch knobs counterclockwise. Rotate the clutch knobs on each axis clockwise to lock the telescope in place.

Adjusting the Mount

In order for the clock drive to track accurately, the telescope’s axis of rotation must be parallel to the Earth’s axis of rotation, a process known as polar alignment. Polar alignment is achieved NOT by moving the telescope in R.A. or DEC, but by adjusting the mount vertically, which is called altitude, and horizontally, which is called azimuth. This section simply covers the correct movement of the telescope during the polar alignment process. The actual process of polar alignment, that is making the telescope’s axis of rotation parallel to the Earth’s, is described later in this manual in the section on “Polar Alignment.”

To adjust the mount in altitude:

DEC Clutch

Knob

R.A. Clutch

Knobs

Figure 2-9

1.Locate the altitude adjustment bolt just above the tripod column (see figure 2-10).

2.Using the 7/32" Allen wrench provided, turn the altitude adjustment bolt until the mount is at the right elevation.

The total altitude range is from 13° to 65°. With the 23 lb counterweight attached to the counterweight shaft, the equatorial head can go as low as 20° without hitting the tripod leg.

To adjust the mount in azimuth:

Azimuth Lock

Knobs

Altitude Adjustment

Bolt

1.Locate the azimuth adjustment bolt on the flat portion of the tripod column (see figure 2-10).

2.Loosen the two azimuth lock knobs located on the top of the tripod column.

3.Turn the azimuth adjustment bolt with the 7/32" Allen wrench until the polar axis is pointing in the right direction.

4.Tighten the azimuth lock knobs to hold the mount in place. The mount can be moved ± 7° in azimuth using these bolts.

Helpful Hint: Located on the side of the equatorial mount head is a hole that serves as a convenient storage place for the polar alignment Allen wrench. This will help prevent you from misplacing the tool when polar aligning in the field.

Keep in mind that adjusting the mount is done during the polar alignment process only. Once polar aligned, the mount must NOT be moved. Pointing the telescope is done by moving the mount in right ascension and declination, as described earlier in this manual. Once the appropriate adjustments have been made and you are aligned on the celestial pole, turn the clock drive on and the telescope will track.

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Contents CGE800 CGE925 CGE1100 CGE1400 User Defined Objects Telescope Maintenance Some of the many standard features of the CGE include CGE 1400 Shown 12v Output JackSetting up the Tripod Power SupplyCounterweight DiagonalAttaching the Center Leg Brace Attaching the Electronics PierInstalling the Counterweight Bar Installing the CounterweightCounterweight Locking Screw Safety Screw Washer Attaching the Equatorial MountAttaching the Optical Tube to the Mount Attaching the Visual BackDovetail Slide Bar Dovetail Locking Knobs Mounting Platform Installing the Star Diagonal Installing the EyepieceInstalling the Finderscope Adjusting the Mount Moving the Telescope ManuallyBalancing The Mount in R.A Balancing The Mount in DECPowering the Telescope Attaching the Motor CablesTransporting the CGE Page CGE Hand Control Named Stars Named ObjectsDouble Stars Variable StarsAlignment Procedures Startup ProcedureAuto Two-Star Align Auto One-Star AlignQuick-Align Last AlignmentCGE Re-Alignment Object Catalog Selecting an ObjectSlewing to an Object Finding PlanetsTour Mode Constellation TourDirection Buttons Rate ButtonSetup Procedures Identify Scope Setup Features Precise GoToObserving Tip Helpful Hint Utility Features Helpful Hint Page CGE Ready Image Orientation Focusing Calculating MagnificationDetermining Field of View General Observing Hints Celestial Coordinate System Motion of the Stars Latitude Scales Pointing at PolarisFinding the North Celestial Pole Declination Drift Method of Polar Alignment Observing the Moon Lunar Observing HintsObserving the Planets Planetary Observing HintsObserving the Sun Solar Observing HintsObserving Deep Sky Objects Seeing ConditionsSeeing Short Exposure Prime Focus Photography Eyepiece Projection FullLong Exposure Prime Focus Photography Planet ISO Moon Mercury Venus Mars Jupiter SaturnPeriodic Error Correction PEC Using Periodic Error Correction Terrestrial Photography MeteringReducing Vibration CCD ImagingFastar Compatible Optical System Fastar F/2 Imaging With Reducer/Corrector Medium size to small galaxiesPlanetary or Lunar Auto Guiding Care and Cleaning of the Optics CollimationCollimated telescope Should appear Symmetrical with Page At f/10 and 163 power with the CGE Page Technical Specifications Idle Current Appendix a Longitudes Latitudes Georgia Minnesota Rhode Island Canada Appendix B RS-232 Connection Communication ProtocolAdditional RS232 Commands Reset The Position Of Azm Or AltAppendix C Maps of Time Zones Page Page Page Page Page Page Page Celestron TWO Year Warranty