Orion 9791 manual

INSTRUCTION MANUAL IN 353 Rev . A 3/10 Customer Support (800 ) 676 -1   Corporate Offices (831) 763-7000 • 89 Hangar W ay , Watson ville, CA 95076  ™  [...]

2  The SkyQuest XX14i IntelliScope T russ T ube Dobsonian[...]

3 Congr atulations on your purchase of an Or ion ® SkyQuest ™ XX14i IntelliScope ® T russ T ube Dobsonian. It’ s a deep-sky observer’ s dream telescope, off er ing jumbo 14" parabolic optics; an Or ion-engineered collapsible base outfitted with IntelliScope object locating technology; and a sturdy truss tube design that easily disassem[...]

4  The parts in the box containing the optical tube and accessories. 35mm DeepView ey epiece 10mm Sir ius Plössl eyepiece IntelliScope Object Locator Kit Software 9x50 Finder scope Finder scope brack et with O-r ing Collimation cap Hex ke ys (x3) W ashers Cooling fan mounting screws Upper tube section Lower tube secti[...]

5   Bo x #1: Optical T ube Assembl y and Accessories (ref er to Figure 2) Qty . Description 1 Lower optical tube section 1 Upper optical tube section 2 Dust cov ers 1 IntelliScope Object Locator kit (see Bo x #1A at r ight f or list of par ts) 1 35mm Deep View e yepiece, 2" barrel diameter 1 10mm Sirius Plössl ey[...]

6 Bo x #2: Primary Mirror and Cell (ref er to Figure 4) Qty . Description 1 Primar y mirror 1 Mirror cell 3 Collimation knobs 3 Nylon washers (3/4" outer dia.) 3 Springs Bo x #3: Dobsonian Base (ref er to Figure 5) Qty . Description 1 Left panel 1 Right panel 1 F ront panel 1 T op baseplate 1 Ground baseplate 2 Side braces 6 Base assembly w oo[...]

7  The parts in the box containing the Dobsonian base. Left panel Right panel F ront panel Metal inser t T op baseplate Ground baseplate Side braces (x2) Connecting bolts (x12) Hex ke y Crescent wrench Handle Eyepiece rack Altitude tensioning/ retaining knobs (x2) Eyepiece rack wood screws V ertical stop knob Fender wa[...]

8 Bo x #4: T russ poles (ref er to Figure 6) Qty . Description 4 T r uss pole assemblies (captiv e pairs)  Now that you hav e unpack ed the box es and f amiliar ized yourself with all of the par ts in front of you, it’ s time to begin assembly . In addition to the supplied tools, you’ll need a Phillips screwdriv[...]

9 N R R M B C D L N O H P J E F A H I Q Q G (x12) S (x12) T (x12)  Exploded vie w of the XX14i base.[...]

10 Push the washer up on the bolt as far as you can with y our fingers (Figure 8a). Then place the inser tion tube on the bolt (Figure 8b) and use it to push the washer farther up on the bolt, into the counterbored hole in the wood (Fig - ure 8c). The washer will keep the bolt captive when it is fully disengaged from the mating par t of the base. R[...]

11 encoder disk so the registration feature on the bushing goes into the hole in the encoder disk. Carefully position the top baseplate (D) ov er the ground 11. baseplate (A) and lower it so the brass azimuth bushing (F) goes through the center hole in the top baseplate (Figure 11) . When the top baseplate is resting on the ground baseplate, the br[...]

12 to do , but b y lightly pressing the scre w tips into the holes, they should “stick” enough so that you can screw them in without one or more of them (and the w ashers) f alling out. Using a small Phillips screwdriver , tighten all four screws (Figure 14). The altitude encoder assembly is installed onto the base’ s 16. right side panel. Be[...]

13 from its jack on the altitude encoder board and from the clip at the bottom of the right side panel. Both cables could be left connected to the encoder connector board on the left side panel. Inser t one end of the controller coil cable into the larger of 22. the two jac ks on the top of the IntelliScope Object Locator . Inser t the o ther en d [...]

14 T o install the mirror cell into the optical tube, the rear end 1. ring attached to the lower section of the optical tube must first be remov ed. This is done b y unthreading and remov- ing the eight Phillips-head screws that connect the end ring to the tube (Figure 18), and then pulling the end r ing off of the tube. W ar ning: Once the rear en[...]

15 Assembling the end r ing (and mirror cell) back onto 5 . the tube can be a bit tr icky . This is because the large diameter and thin metal of the tube will cause the tube to become somewhat out of round once the end ring is remov ed. T o assemble the rear end r ing (with mirror and mirror cell now connected) to the tube, stand the lower section [...]

16 Note: If desired, you can mount the low er tube section on the base bef ore connecting the tr uss pole assemblies and upper tube section (Figure 24). Y ou ma y find it easier to lift the lo wer tube section and guide it onto its resting place on the base’ s bearing cylinders than hoisting and mounting the fully assem- bled optical tube . Conn[...]

17 Firmly tighten the eight clamping knobs on the lo wer truss 9. suppor t ring. If , after assembling, the truss poles are loose within the 10. truss connectors, use the supplied 4mm he x ke y to tight- en the button head cap screws which connect the poles to the truss connectors (see Figure 26 ). This should rare- ly need to be done. The telescop[...]

18 against the CorrecT ension pads on the interior surface of the left panel. On the other (retaining) knob , slide the altitude retain - 3. ing knob spacer onto the threaded shaft. Then push the shaft through the altitude encoder’ s aluminum shaft (now protruding from the r ight side panel) and into the optical tube’ s other altitude bearing ([...]

19 end) of the finder scope into the end of the brack et’ s cyl- in de r op po si te t he al i gn me nt s cr ews wh i le pu ll in g th e chrome, spring-loaded tensioner on the brack et with your fingers (Figure 31). Push the finder scope through the brac ket until the O-ring seats just inside the front opening of the brac ket. Release the tension[...]

20            Collimating is the process of adjusting the mirrors so they are aligned with one another . Y our telescope’ s optics w ere aligned at the factory , and should not need much adjustment unless the telesco[...]

21 and causing damage if something comes loose while y ou are making adjustments. Place a sheet of white paper inside the optical tube directly opposite the f ocuser . The paper will provide a bright “background” when viewing into the focuser . When properly set up for collimation, your telescope should resemble Figure 37. [...]

22 completely unthread from the ends of the spider vanes. Also , when making this adjustment, be careful not to stress the spi- der vanes or the y could bend.    The secondar y mirror should fac[...]

23 nor th star) is a good star to use for star testing, because it will not mov e out of the field of view .  The 2" Cra yford f ocuser of the XX14i can be collimated using three pairs of push-pull screws located at the base of the fo - cuser [...]

24 motion; this ensures optimal perf or mance. The motion should be ideal – not too stiff, not too loose. Y ou will want to be able to “track” the motion of celestial objects while viewing them by making small mov ements of the telescope without experienc- ing jer king (too much tension) or overshooting of the desired position (too little ten[...]

25 Now look through the finder scope. Ideally , the object should be within the field of view . If not, then coarse adjustments to the brack et’ s alignment thumb screws will be needed. Once the ima ge is in the fi nder sc ope’s fie ld of view , you will now use the brac ket’ s alignment thumb screws to center the object on the intersection o[...]

26 ey epieces. A wider field can be desir able for viewing e xtended deep-sky objects that are too large to fit within a narrower field of view .   With the three counterweights installed on the bac k of the rear cell, the XX14i optical tube will achie ve proper balance with its supplied accessories. For heavier [...]

27 Loosen the eight captiv e connecting bolts that attach the 2. side and front panels to the top baseplate (Figure 45). Y ou will hav e to tur n the hand knobs about sev en full turns or so to unthread the bolts completely from their receptacles in the top baseplate. Remember , the bolts are captiv e so they will not come out when they are dis - e[...]

28 your target much more quickly (and quietly!) than other com - puterized telescopes can – and without guzzling all those bat- teries in the process. The Object Locator’ s database includes: 7,840 objects from the Re vised New General Catalog • (NGC) 5,386 objects from the Inde x Catalog (IC) • 110 objects from the Messier Catalog (M) • [...]

29 get better later in the ev ening, as much of the heat absorbed by the Ear th dur ing the da y has radiated off into space. In conditions of bad seeing, stars will twinkle and objects will appear unsteady and blurry in the telescope. “T ransparency” is the clar ity of the atmosphere, which can be adversely affected by the presence of moisture[...]

30 objects like planets and double stars. The Moon also takes higher magnifications well. Deep sky objects, howe ver , typically look better at medium or low magnifications. This is because many of them are quite f aint, yet hav e some e xtent (apparent width). Deep sky objects will often disappear at higher magnifications, since greater magnificat[...]

31  The SkyQuest XX14i IntelliScope T r uss T ube Dobsonian is designed f or visual, not imaging, use. The Dobsonian mount is not an equatorial-type mount, and is not motor driven f or long e xposure astro-imaging. The telescope has also been optically optimized for visual use,[...]

32 washer . It sits directly atop the female threaded post that the he x head bolts screw into . Remov e that washer too . Y ou ma y now lift the mirror out of the mirror cell and out of the lower tube section. Do not touch the surf ace of the mirror with your fingers; lift it carefully b y its edge. Set the mirror , aluminized face up, on a clean,[...]

33  Optical T ube Assembly (O T A) Primar y mirror : 356mm (14.0") diameter reflective surf ace, lo w ther mal e xpansion optical glass, parabolic, center mark ed F ocal length: 1650mm F ocal ratio: f/4.6 Primar y mirror cell: 18-point flotation, 3 spring- loaded collimation knobs Secondar y m[...]

34    The Orion SkyQuest XX14i IntelliScope T r uss T ube Dobsonian is warranted against def ects in materials or workmanship for a period of one year from the date of purchase. This warranty is f or the benefit of the original retail purchaser only . During this warranty pe[...]