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CAUTION! Be extremely careful when attaching the balance weights. Weights can fall and dam-
age the main mirror! Always transport the balance weights separately from the optics during
transport and sufficiently secure them against slipping!
NOTICE! The four balance weights are mounted at different positions. Select only the mounting
points described below!
It is recommended to protect the main mirror from possible damage by means of a suitable cover be-
fore mounting.
1. Put each one counterweight from below onto the short rods in the corners of the mirror box and
hand-tighten the fixing screws.
2. Slide a further counterweight from above onto each of the two front tube trusses and hand-tighten
the fixing screws.
11 Mounting and adjustment of the secondary
mirror cage
Illustration 5:
Mounting the trusses (left) and adjusting screws (right) on the secondary mirror cage.
NOTICE! All elements of the secondary mirror cage are pre-assembled ex works. Depending on
the application, the cage can be mounted in 90° steps. This ensures a comfortable view when
pulling or pushing the Dobson telescope. The assembly should ideally be carried out by two per-
sons. Mount the secondary mirror cage taking into account the later position of the eyepiece
extension.
1. Place two trusses each from opposite pairs of rods on a threaded screw on the secondary mirror
cage and tighten with a head nut.
2. Tighten the fixing screws only slightly at first and hand tightly only after all rods have been at-
tached.
WARNING! Do not tilt the screws when screwing them in! The screwing in of twisted screws
with the use of force leads to damage to the thread in the secondary mirror cage.
3. For a subsequent adjustment of the spider-vanes of secondary mirror holder, loosen the lateral fix-
ing screws one after the other slightly.
4. Move the secondary mirror spider upwards or downwards until the desired position is reached.
5. Tighten the fixing screws by hand.
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