Orion 7832 - Manual (Page 2)

2
This attachment process is tricky, and it may take you sev-
eral tries before you get it right.
3. Remove the R.A. slow-motion control knob from the R.A.
worm gear shaft if it is on the side of the mount that the
motor assembly’s brass gear is on, and attach it to the
opposite end of the worm gear shaft.
4. Slide the open end of the manual clutch assembly (Figure
4) onto the worm gear shaft. Rotate the manual clutch
assembly so that the setscrew will press against the flat in
the R.A. worm gear shaft. Secure the manual clutch
assembly by tightening the setscrew with a 2mm hex key.
5. Make certain that the teeth of the motor assembly gear
mesh with the teeth of the manual clutch assembly gear.
Also, make certain the gears are not too tightly pressed
together. You can adjust the way the gears mesh by tight-
ening or loosening the socket-head cap screw that is used
to attach the R.A. motor assembly to the mount. If the
gears are not meshed correctly or are too tightly pressed
together, then the drive will not track properly, or at all.
When finished, the assembled R.A. drive should resemble
Figure 5. You can now replace the R.A. motor cover and secure
it with the Phillips head screw.
Please note that if you wish to use the slow-motion con-
trol knob to move the telescope in R.A. with the R.A. motor
drive attached, you must first loosen the thumbwheel on
the manual clutch assembly. Failure to do so may result
in damage to the motor.
Attaching the Dec. Motor
Drive
Before attaching the Dec. motor drive, the telescope tube must
be removed from the mount.
1. The Dec. motor assembly is identified by its black, cylindri-
cal body (Figure 6). It is attached to the equatorial mount
with the 5mm socket-head cap screw that goes through
the hole in the flange at the top of the equatorial mount
(Figure 7). The motor assembly should be attached so that
it is oriented as shown in Figure 8. Hold the motor assem-
bly so that its threaded hole lines up with the hole in the
top of the mount. Thread the screw with a 5mm hex key
through the mount and into the motor assembly. Thread
the screw into the motor assembly until it is secure, but do
not overtighten.
2. Remove the Dec. slow-motion control knob if it is on the
end of the Dec. worm gear shaft closest to the Dec. motor
Figure 3. The motor is attached to the front of the mount by a
sockethead cap screw pushed up through the hole in the rear of the
mount.
R.A. worm gear
shaft
Brass gear of R.A.
motor assembly Hole
Figure 4. The manual clutch assembly.
Brass gear
Thumbwheel
Setscrew
Figure 5. The assembled R.A. motor drive.
Figure 6. The Dec. motor assembly.
Modular
jack
Threaded hole
Brass gear
Open end