9
6. ORDER OF OPERATION
6.1. Operation with telescope
Before mounting the telescope it is required to choose a place and
prepare a site. It must be even and solid. Mount the telescope on the
site and check it for reliable stability.
For pointing to an object the telescope should be rotated about two
axes. For rotation of the declination axis it Is necessary to undo braking
screw 2 (fig. 5), rotate the telescope and screw in the bracking screw.
If backlash is arisen in the worm gear it is necessary to disengage motor
7 (fig. 0). For this purpose it is required to take off cap 3, slacken three
screws 8, displace motor 7 upwards and fix it with screws 8. Remove
handwheels 4 after unscrewing screws 5. After that slacken screws 6
which fasten worm 9 in the bearings. After pressing the worm to worm
wheel 0 fix it with screws 6. Mount handwheels 4 and secure them
with screws 5. Then slacken screws 8, displace the motor downwards
until engagement with the toothed wheel of the worm takes place and
secure them with screws 8. Mount cap 3 on the casing.
The smoothness of rotation of toothed wheel together with the toothed
wheel of worm 9 is checked by rotation of the handwheels, in doing so
probable sliding or jamming of the friction clutch may take place.
For its adjustment it is required to displace cap 2 and tighten or slacken
three screws 3. The friction clutch adjustment is considered to be finished
if handwheels 4 rotate smoothly.
The telescope rotates about the polar axis owing to minor effort
and is not fixed. The axis is connected to the watch drive with the help
of a friction mechanism.
The celestial sphere and all astronomical objects perform a complete
rotation for twenty four hours. As a result the object in the telescope field
of view displaces constantly. The speed of its displacement increases with
the increase of the telescope magnification. Therefore, the telescope is
provided with electric clock drive 8 (fig. 5) which rotates uniformly the
telescope which follows the object. As a result, in the process of obervation
the object remains constantly at the centre of the field of view.
