Meade LX850 User Manual - Page 56
Appendix F - 12 inch
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AutoStar #497ApHpAeNnDdiBxOFX APPENDIX F : Initial Set-up: 12" and 14" ACF OTA's, Starlock and the StarLock Counterweight Set-up The following provides guidelines for during your initial Positioning the StarLock assembly set-up of your 12" and 14" ACF LX850 Telescopes. These guidelines are meant only as a starting point, as you will need to fine tune the balance of your telescope depending on the equipment and accessories that you will be using. Balancing the DEC Axis (ACF OTA Only) Hold the optical tube so that it cannot accidentally swing freely. NOTE: An unbalanced OTA can swing quickly causing injury to the user. Position the RA axis parallel to the ground and tighten the RA locks. Position the OTA parallel to the ground. Unlock the DEC Clutches. The telescope now is able to move freely about the DEC axes. Flush with rear of receiver Fig 45: Position StarLock flush with the receiver. To position StarLock, loosen the two (2) retaining nuts at the side of dovetail adapter; position Starlock so that the back edge of the StarLock dovetail is flush with the lower edge of the saddle plate. Tighten to securely retain StarLock (Page 8, Fig. 42). Positioning the StarLock counterweight About 1/2" inch Fig 44: Start with 1/2" of the dovetail exposed. About 1/2" inch Slightly loosen the OTA dovetail adapter lock knobs (Page 8, Fig. 29) so that the tube assembly slides easily back and forth in the dovetail mount. Be careful that the OTA does not fall out of the dovetail adapter! Start with 1/2" of the OTA dovetail plate extended out of the DEC Saddle (See Appendix E). Move the OTA assembly fore or aft, in the dovetail adapter until the telescope remains in horizontal position without tending to drift down in either direction. Once this is achieved tighten the OTA dovetail lock knobs firmly. Fig 46: Gap of 1/2" between cap screw and weight. To position the StarLock counter weight, loosen the retaining nut that attaches the weight to the saddle plate. Position StarLock counterweight so that there is a gap of about ½ of an inch between it and the adjacent cap screws that tighten the OTA to the saddle plate. Use this position when you begin to balance StarLock, as described on Page 20. 56