Celestron CGX-L Equatorial Mount and Tripod CGX-L Manual 5 Languages - Page 26

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. 2. T est 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. - T urn the Distance Adjustment Screw clockwise and check for recoil. • If the worm block recoils but there is noticeable backlash when the axis is locked. 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. - 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 Worm Gear Block Worm Gear Worm Wheel 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). Distance Adjustment Screw Range Limit Screw Figure 14 Worm gear mesh 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 Figure 13 Removing the gear cover 26 | ENGLISH