ASTRO-PHYSICS 400GTO Manual Petunjuk Perakitan - Halaman 12

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INSTALLATION OF ENCODERS AND ENCODER HOUSINGS –400 MOUNT
400NC (purchased separately)
Parts List:
1
Right Ascension (R.A.) Encoder housing (black anodized)
1
Declination (Dec.) Encoder housing (black anodized)
1
R.A. Axis Adapter (clear anodized - silver colored), labeled R.A.
1
Dec. Axis Adapter (clear anodized - silver colored), labeled Dec.
To install your encoders, first remove the telescope from your mount. Remove your declination counter weight(s) and
declination counterweight shaft.

Fitting Declination Encoder Housing

1.
If the encoders were purchased with the 400 mount, it is likely
that the declination axis adapter and encoder housing have
already been installed. No further action will be required, as
this encoder will remain in place.
2.
If the encoders were purchased separately, the silver-colored
Dec. axis adapter may be inside the black Dec. axis encoder
housing. If it is, remove it now.
3.
Thread the dec. axis adapter into the end of your dec. axis
(from where you earlier removed the dec. counterweight shaft).
Final tightening should be done with firm hand pressure.
Normally the Dec. axis adapter will not be removed.
4.
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 Dec. axis adapter. This allows the
encoder to read the motion of the declination shaft as the declination axis moves.
5.
Thread the Dec. encoder housing onto the Dec. axis housing. You may need to wiggle the encoder housing gently to
engage the shaft of the encoder with the hole in the center of the Dec. axis adapter. When the threading is complete,
tighten up with firm hand pressure since normally this encoder housing will not be removed.
6.
Thread the counterweight shaft into the rear of the Dec. encoder housing.

Fitting Right Ascension Encoder Housing

1.
If the encoders were purchased with the 400 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.
2.
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.
3.
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.
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