User manual ORION TELESCOPES & BINOCULARS 07815

[. . . ] INSTRUCTION MANUAL Orion AccuTrack SVD DC Dual-Axis Drive System ® TM #7815 For Orion SkyView DeluxeTM Equatorial Mount Customer Support (800) 676-1343 E-mail: support@telescope. com Corporate Offices (831) 763-7000 Providing Exceptional Consumer Optical Products Since 1975 P. O. A 0699 Congratulations on purchasing an Orion AccuTrack SVD DC Dual-Axis Drive System!The AccuTrack SVD DC Dual-Axis Drive System is a necessary component for doing long-exposure astrophotography with the Orion SkyView Deluxe Equatorial Mount; it provides accurate siderial tracking with an electronic hand controller for making positional corrections to both the R. A. It is also a useful tool for those who want precise hands-free tracking, with the additional feature of electronic slow-motion controls for both of the mount's axes. The AccuTrack SVD DC Dual-Axis Drive System utilizes advanced motor control technology to provide precision speed control for very low power DC servo motors. [. . . ] The fit is snug, so it may take a little effort to seat the motor cover over the motor. Connection of Cables to Hand Controller Now that the cables are connected to the motors, the other ends must be connected to the hand controller. There are two input receptacles for the cables on the top end of the hand controller; the end of the R. A. Installing the Battery in the Hand Controller Before connecting the battery, make sure that the on/off switch on the front of the hand controller is in the "off" (O) position. Remove the cover on the back of the hand controller to expose the battery compartment. Attach the battery con- 4 nector to the 9-volt battery's terminals. Position the battery securely within the compartment, and replace the cover. The installation of your AccuTrack SVD Dual-Axis Drive System is now complete. You can re-attach the slow-motion controls, telescope, and counterweights, as needed. 3. Operation Polar Alignment In order for the drive system to track the rotation of the sky, the R. A. axis of the SVD mount must be first aligned parallel to the Earth's polar axis. The AccuTrack SVD DC Dual-Axis Drive System will not track objects accurately (objects will not stay in the field-of-view over time) if the telescope's polar axis is not precisely pointing to the correct spot in the sky. Polar alignment of the SkyView Deluxe mount is quite easy to do, since the mount comes with a polar axis telescope; this provides a convenient and accurate way to polar align. Consult the manual that came with the SVD mount in order to properly use the polar axis telescope. Powering Up Slide the power switch to the "on" (I) position. Setting the Directional Switch The drive system comes set up out of the box for Northern Hemisphere observing. If viewing from the Southern Hemisphere, simply depress the UP and DOWN pushbuttons on the hand controller simultaneously while turning the unit on; the system will then track correctly for Southern Hemisphere observing. This manual is specifically written for Northern Hemisphere observers; for Southern Hemisphere observers, the directional controls will be reversed. Using the Hand Controller The hand controller houses most of the integral electronics of the Accutrack SVD DC Dual-Axis Drive System; it issues commands to the motors in order for them to move at the proper, or desired, rate. There are four pushbuttons on the hand controller: UP, DOWN, LEFT, and RIGHT. But remember, do not turn the slow-motion controls if the black nylon thumbscrew on the motor's drive coupling is engaged. If none of the pushbuttons on the hand controller are pressed and the power switch is in the "on" position, the R. A. [. . . ] If one or both worm gears feel tight, the torque needed to turn the cable must be decreased. The first adjustment reduces tension on the worm gear imparted from the way that it is mounted within its housing. To do this, the worm gear must first be completely removed from the telescope (as in Figure 14). It will also be convenient to completely remove the motor entirely from the worm gear. [. . . ]