ASTRO-PHYSICS 1200 Manual - Halaman 12
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Halaman CetakFITTING RIGHT ASCENSION ENCODER HOUSING
If the encoders were purchased with the 1200 mount, it is likely that the right ascension axis adapter and encoder housing
have already been installed. Please continue to read these directions since you may need to remove and reinstall the
encoders if you use a polar alignment scope. Since the polar axis telescope and R.A. axis adapter thread into the same
location, you will need to switch back and forth between them as needed. If you use the JMI NGC MAX or Mini Max
Digital Setting Circles, you can use the "polar align" mode in these units instead of a polar alignment scope.
1. If the encoders were purchased separately, the silver-colored R.A. axis adapter may be inside the R.A. axis encoder
housing. If it is, remove it now.
2. Thread the R.A. axis adapter into the end of your R.A. axis. If your polar alignment scope is fitted you must remove
this first along with the polar alignment scope adapter. Use moderate hand pressure to tighten the R.A. adapter since
you may need to remove it to install the polar axis telescope at a later time.
3. If you look into the black
encoder housing, you will
see the encoder itself
mounted at the rear of the
housing. When this
installation procedure is
complete, the encoder shaft
will insert into the center hole
of the R.A. axis adapter.
This allows the encoder to
read the motion of the R.A.
shaft as the right ascension
axis moves.
4. Now thread the R.A. encoder
housing onto the R.A. axis
housing. You may need to
wiggle the encoder housing
gently to engage the shaft of
the encoder (located within
the R.A. axis housing) with
the hole in the center of the
R.A. axis adapter. Again,
use moderate hand pressure
as you may wish to remove
that at some time.
5. The hardware for your encoders is now installed. For actual set-up procedures for Micro MAX, Mini MAX or NGC
MAX, digital readouts refer to the relevant operating manual from the manufacturer. We provide some startup tips in
our instruction sheet entitled "Using JMI Setting Circles".
PERIODIC MAINTENANCE
If you remove the R.A. encoder frequently, you may wish to use a very tiny amount of auto grease on the mating threads.
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