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INSTALLATION OF ENCODERS AND ENCODER HOUSINGS -1200 MOUNT
1200ENC (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
If the encoders were purchased with the 1200 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.
1. 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.
2. Locate the counterweight shaft adapter (the black anodized part that the counterweight threads into) on the Dec. axis.
When we assembled the mounts, we threaded this on rather tightly, so you will need some extra leverage to remove it.
Locate the hole that was drilled into the part and find some object that you can insert. We suggest that you use one of
your allen head wrenches that is wrapped in masking tape so that you do not mar the finish of the part. You may need
to apply a good deal of force so it may be easiest to do if the mount is on the pier so that it won’t move.
3. Thread the Dec. axis adapter into the end of your Dec. axis 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 of the 1200 mount. 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 (or insert your special “tool” from above and tighten firmly)
since normally this encoder housing will not be removed.
6. The counterweight shaft may now be rethreaded into the rear of the Dec. encoder housing.
Diagram 13