Celestron CGX Equatorial 800 HD Telescopes CGX EQ Mount and Tripod Manual - Page 25

Appendix B, Care and Maintenance

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Appendix B: Care and Maintenance The CGX mount is sturdy and will last many years when properly cared for. Storage Although the mount and electronics are designed for outdoor usage, you should not store the mount outside unless it's sheltered by an observatory or storage shelter of some kind (such as a garage). Constant hot, cold, and humidity extremes can eventually cause wear to the electronics, mechanical lubrication and the finish quality of the mount. Store in a sheltered area away from the Sun. Keep in a dry place if possible. Worm Gear Mesh Adjustment The worm gears in the CGX are spring loaded for optimum mesh against the worm wheel. This also accommodates temperature changes. However, if you find the backlash has increased or is otherwise not optimal, you can make an adjustment to the gear mesh. Do not attempt to make this adjustment until you have confirmed the backlash warrants it. Do not overtighten the worm gear mesh, as binding could result. 1. Using a Phillips head screwdriver, remove the gear cover for the axis you intend to adjust (Figure 12). 3. Using a 2mm and 2.5mm Allen wrench, make very slight adjustments as needed to optimize the gear mesh (Figure X2). •  If the worm block does not recoil, the mesh is too tight, or the limit screw is pushing the block against the worm wheel. - Turn the Range Limit Screw clockwise and check for recoil. - Turn the Distance Adjustment Screw clockwise and check for recoil. • If the worm block recoils but there is noticeable backlash when the axis is locked. - Turn the Distance Adjustment Screw counterclockwise very slightly, only 1/16th of a turn or less and retest. - Tighten the Range Limit Screw slightly if the recoil exceeds approximately 1mm. Worm Gear Block Motor Worm Gear Distance Worm Wheel Adjustment Screw Range Limit Screw Figure 13 Worm gear mesh Figure 12 Removing the gear cover 2. Test the mesh by grabbing hold of the motor and worm block with your hand and pulling it away from the worm wheel. The worm block should recoil slightly, causing the worm gear to back away from the worm wheel slightly. ENGLISH | 25

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ENGLISH |
25
Appendix B:
Care and Maintenance
The CGX mount is
sturdy
and will last many years when
properly cared for°
Storage
Although the mount and electronics are designed for
outdoor usage, you should not store the mount outside
unless it’s sheltered by an observatory or storage shelter
of some kind (such as a garage)° Constant hot, cold, and
humidity extremes can eventually cause wear to the elec-
tronics, mechanical lubrication and the finish quality of the
mount° Store in a sheltered area away from the Sun° Keep
in a dry place if possible°
Worm Gear Mesh Adjustment
The worm gears in the CGX are spring loaded for optimum
mesh against the worm wheel° This also accommodates
temperature changes° However, if you find the backlash
has increased or is otherwise not optimal, you can make an
adjustment to the gear mesh° Do not attempt to make this
adjustment until you have confirmed the backlash warrants
it° Do not overtighten the worm gear mesh, as binding
could result°
1° Using a Phillips head screwdriver, remove the gear cover
for the axis you intend to adjust (Figure 12)°
2° Test the mesh by grabbing hold of the motor and worm
block with your hand and pulling it away from the worm
wheel° The worm block should recoil slightly, causing the
worm gear to back away from the worm wheel slightly°
3° Using a 2mm and 2°5mm Allen wrench, make very
slight adjustments as needed to optimize the gear
mesh (Figure X2)°
•
If the worm block does not recoil, the mesh is too tight,
or the limit screw is pushing the block against the
worm wheel°
- Turn the Range Limit Screw clockwise and
check for recoil°
- Turn the Distance Adjustment Screw clockwise
and check for recoil°
•
If the worm block recoils but there is noticeable backlash
when the axis is locked°
- Turn the Distance Adjustment Screw counter-
clockwise very slightly, only 1/16th of a turn or
less and retest°
- Tighten the Range Limit Screw slightly if the
recoil exceeds approximately 1mm°
Figure 12 Removing the gear cover
Figure 13 Worm gear mesh
Distance
Adjustment
Screw
Motor
Range
Limit Screw
Worm Gear Block
Worm
Gear
Worm
Wheel