Appendix B: Care And Maintenance; Appendix C: Pwi Telescope Control Software - Celestron CGX-L Mode D'emploi

Appendix B:
Care and Maintenance
The CGX-L 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
If the mount is wet with dew after a night of use, allow the
mount to dry off before storing
Worm Gear Mesh Adjustment
Required tools: Phillips head screwdriver, 2 5mm Allen
wrench, 2mm Allen wrench
The worm gears in the CGX-L are spring loaded for optimum
mesh against the worm wheel When adjusted correctly,
the worm exerts a firm but gentle pressure against the
worm wheel This allows the assembly to accommodate
temperature changes and long-term wear When the pressure
is correct, the worm and gear mesh properly and the mount
shows very little backlash If the gear spacing is too large or
the pressure is too light, the amount of backlash can become
noticeable Do not attempt to make this adjustment until you
have confirmed the backlash warrants it
WARNING: A small amount of backlash is normal. Do not
overtighten the worm gear mesh. If the mesh is too tight,
the worm may bind against the worm wheel, and damage
could result.
1 Using a Phillips head screwdriver, remove the gear cover
for the axis you intend to adjust (Figure 13)
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Figure 13 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
3 Using a 2mm and 2 5mm Allen wrench, make very
slight adjustments as needed to optimize the gear mesh
(Figure 14)
• 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
Motor
Distance
Adjustment
Screw
Range
Limit Screw
Appendix C:
PWI Telescope Control Software
Celestron offers a free download of PWI telescope
control software, which was co-developed by PlaneWave
Instruments Please download the software from this link
Instructions on software usage can also be found from the
CGX-L's product support page
http://www celestron com/support/manuals-software/files/
CGX-L-control-software-download
Worm
Gear
Block Worm
Worm
Gear
Wheel
Figure 14 Worm gear mesh