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Mount Description
The Linear Fast Reverse is an innovative mount that accomplishes the movements of right
ascension and declination by means of pulleys and tooth belts in the place of the classic worms
and gears. This choice has allowed to obtain several advantages such as a really steady motion
without play (no backlash) and sudden peaks, factors of paramount relevance for long guided
exposures and during high magnification visual observations. These features are of particular
relevance especially for the declination axis motor that can now quickly reverse the motion
without breaks to recover the plays: from here the mount name Fast Reverse.
The toothed belts used in the LineAR have the structure made of special material with steel
strands to avoid any deformation, elongation and stress.
It is important to underline that in the
pulley-toothed belt system, no direct contact occurs between the pulley and the motion is
transmitted by the belt engaging from 50% to 90% of the girth surface. Consequently any error,
eventually present, is
averaged among the cogs,
moreover soft, pledged over
the pulley, greatly reducing
the tracking error. On the
contrary, in the classical
worm–gear systems the
motion transmission is
performed in a single contact
point between the worm and
the gear thread and therefore
any error in one of the contact
surfaces is taken into account
as a tracking error.
Since there are no gears, there
is no need of periodical
lubrication of the internal
components and therefore the
maintenance is extremely
reduced and limited to the
external cleaning.
The picture shows all the
main items of the mount.
Their use is described in
detail in Section 3.
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Summary of Contents for Linear Fast Reverse
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