15
5. PREPARATION FOR OPERATION
5.1. Telescope assembling
Before assembling the telescope the units and parts must be cleaned
from the slushing compound of the plant.
The telescope is assembled in the following way.
Three supports provided with captive screws are fixed to the pier
through the holes on its lower end. The equatorial mounting is screwed
on the upper end of the pier. At the same way it is fixed on the tripod.
The polar axis is set by inclining the equatorial mounting by the
scale of latitudes to the observing site and fixed by means of
handle 9 (fig.6).
The telescope tube is mounted on the supports of the saddle and
fixed by means of two clips with the help of hinged screws.
The finderscope should be removed from the mortise of the case
where the accessories are placed, then it should be mounted on the
tube in two rings and fixed by means of six setting screws provided on
the saddle.
For obtaining the required magnification of the telescoped the re-
spective eyepiece or the eyepiece with Barlow lens 5 (fig. 5) is insert-
ed in the eyepiece tube.
5.2. Telescope balancing
For smooth motion of the telescope and reliable operation of the
micrometer screws it is important to balance its movable parts on the
axes of the equatorial mounting. With this purpose the telescope tube
should be set in the horizontal position, the screw of the brake pos. 3
(fig. 6) of the axis of declinations is unscrewed and, holding slightly
the tube by hand, one sees to it whether the tube remains in the
indifferent equilibrium or one of its ends overweights. If the tube is not
in balance, one unscrews the screws of the clips which fix the tube
and moves the tube along its axis until it will be in balance. After that
one screws in the screws of the clips.
