Re: very strange problem with AP 900 tracking
Howard and Rolando,
Thanks very much for the quick replies. Fortunately it's the simplest
of problems, somehow tracking was set to LUN. Duh! I should have
thought of that! I guess it's easy to bump the 8 accidentally and
change the rate, and the rate stays set even when cycling power
(unlike my old mount!) I guess staying up all night impairs one's
thinking ability, and I'm still getting used to the new mount.
Now if I can only get some clear skies for the remainder of my
astro-vaction we'll see how much my guiding improves when running at
the correct rate!
--- In ap-gto@..., chris1011@... wrote:
the Dec zero due south. If you have no Dec drift, the azimuth axisis set
correctly. If you have no RA drift, the altitude axis is setcorrectly. If drift
in RA is slow, lower the altitude axis. If fast, raise it.in the
Main Menu. If set to LUN or SOL it will be slow.slippage.
final drive gear on
the end of the worm shaft is loose (i.e. the set screw has backedoff) then
the spur gear might be turning, but slipping slowly on the wormshaft, and thus
causing the worm itself to drive slow. In that case, remove thelarge spur
gear with a screw driver and tighten the little setscrew on thefinal spur -
make sure it is centered on the flat on the worm gear shaft.in some
cases. What tends to happen is people want to eliminate all backlashand so set
their worm mesh so tight that the worm cannot move easily againstthe worm
wheel. The motor is strong enough to turn the spur and break the setscrew loose
against all that friction, and thus the little spur goes round andround but
the worm shaft stands still or moves only slowly. When tighteningthe mesh,
make sure that you can physically still move the spur gears easilyby hand before
turning the power on. If you can't easily spin the large spur, if ittakes
considerable effort to turn this gear, then you have set the meshtoo hard, and
you will end up with problems.