move but not slip. To install, place the clutch with the tension pad facing the altitude wheel into the hole nearest the end of the
box with the fans. Attach the clutch by screwing in the large thumb knobs until the tension pad presses firmly against the wheel.
Figure 6
Now look at the mirror box from above. You will notice threaded rods that are sticking out of the corners of the mirror box. There
is a wing nut riding on each of those inward pointing threaded rods. Unscrew the wing nuts to the end of the threaded rods, making
sure that they don´t come off and risk falling onto the main mirror.
Unwrap the truss pairs. Each pair of trusses is connected by a metal bracket that has a groove on the other side. Slide the bracket
with the groove over the threaded rod and fasten the trusses with the wing nut.
Note: After you have fastened the wing nut, the trusses will be secured to the mirror box BUT they will still be able to swing freely
from side to side, which means they could bump into surrounding equipment or people if not carefully monitored. To prevent the
trusses from moving too freely, fasten the screws that hold them a bit tighter but remember that you have to move the trusses
later so do not overtighten them.
Next, it is time to attach the secondary cage unit using the four short screws with knobs. Originally the telescope is designed to
have the focuser oriented on the right side, so that the red dot finder is above the focuser when you move the telescope.
Important: During the attachment of the secondary unit please make sure that you have control of the secondary cage at all
times. If you are doing this for the first time you will need a few minutes to get accustomed to the procedure, since you have to
hold the secondary cage with one hand and align the truss holes and the threaded hole of the secondary unit and insert the screw
with the other hand. If you are doing this for the first time, the help of a second person is very handy.
Align the holes in the upper ends of an opposing pair of trusses, stick a screw through both of them and insert the screw into one
of the threaded holes in the lower brackets of the secondary cage. Do not fully tighten the screws until all four screws are inserted
correctly – trying to force a screw into the threaded hole on the secondary unit will damage the thread. If assembled correctly, that
screws will go into the threads without the use of force. After all four screws are placed into the threaded holes in the secondary
unit, tighten the screws being sure not to overtighten.
Now attach the stray light cover to the secondary unit by pressing the four velcro pads onto their corresponding counterparts on
the secondary unit and attach the red dot finder by sliding it into its bracket.
The telescope is now fully assembled.
Collimating the optical systems
Although the optics in your telescope were carefully collimated in our quality control department prior to leaving our facility, we
recommend collimating the telescope after reassembly. The whole procedure is straightforward and should takes only a few
minutes after reassembly, if you have numbered your trusses and reassemble your telescope the same way it has been
disassembled.
Basically the collimation of the telescope is done in three steps:
Rough Collimation
Collimating the secondary mirror
If the telescope is collimated you should see the concentric images of your eye, the secondary mirror, the main mirror and the
focuser.
To test rough collimation:
Содержание Truss Tube Dobsonian Series
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