ASTRO-PHYSICS 1200 Manuale - Pagina 5

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4. Move the base of the polar axis assembly so that the threaded holes of the pier top can be seen through each of the

four slots.

5. Thread the four hand knobs loosely in place. You will tighten these later after polar alignment.

FITTING RIGHT ASCENSION ENCODER HOUSING

Since the polar alignment telescope and R.A. encoder adapter thread into the same location, you will need to switch

back and forth between them as needed. This is good time to familiarize yourself with the removal and replacement of

the R.A. encoder housing and encoder adapter.

If you use the JMI NGCMAX or Mini MAX Digital Setting Circles, you can use the "polar align" mode in these units

instead of a polar alignment finder scope! Please continue to read these directions anyway since you may need to

remove and reinstall the encoders if you use a polar alignment scope. The 1200 is always supplied with the encoders

installed.

1. To remove: Unscrew R.A. encoder housing and R.A. encoder adapter.

2. To replace: Thread the R.A. encoder adapter into the end of your R.A. axis. (If your polar alignment scope is fitted,

you must remove it first.) Use only moderate hand pressure to tighten the R.A. adapter since you will need to

remove it again.

3. If you look at the black encoder housing, you will see the black 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. encoder

adapter. This allows the encoder to read the motion of the R.A. shaft as the right ascension 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. encoder adapter. Again, use moderate hand pressure, as you will need to remove this again.

The hardware for your encoders is now installed. For actual set-up procedures for the "MicroMAX," "MiniMAX" or

"NGCMAX" digital computers, refer to the relevant operating manual.

If you remove the R.A. encoder frequently, you may wish to use a very tiny amount of auto grease on the mating

threads.

ALTITUDE AND AZIMUTH ADJUSTMENTS – ROUGH POLAR ALIGNMENT

Follow these instructions if you want to rough polar align your mount. If not, you may skip this section and move on to

Assemble Declination Axis.

You may polar align your mount with the telescope and counterweights attached. This is important for accurate polar

alignment. However the adjustment will require considerably more hand effort, so for rough polar alignment, you may

wish to leave your scope and counterweights off.

For rough polar alignment, your goal is to sight the celestial pole when looking through the polar alignment sight hole in

the center of the polar axis. You will need to make altitude (up/down) and azimuth (side to side) adjustments to the

position of the mount.

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for casual observation