Orion SKYVIEW PRO 7817 - Manual (Page 4)

4
2. Remove the R.A. slow-motion control knob from the R.A.
worm gear shaft. The slow-motion knob will not be usable
once the SkyView Pro GoTo system has been installed.
All slow-motion adjustments will be made using the GoTo
hand controller.
3. The R.A. GoTo motor assembly is identified by the 4-pin
rectangular connector attached to the motor body (Figure
3). The motor will be attached to the mount by a 40mm
long socket-head cap screw that goes through the hole
in the rear of the equatorial mount, just above the rear
latitude adjustment L-bolt (Figure 4). It will be helpful to
remove the rear latitude adjustment L-bolt while installing
the R.A. GoTo motor. Place one of the 10mm flat wash-
ers onto the R.A. motor attachment screw. Attach the R.A.
motor attachment screw to the end of a 4mm hex key and
push it up through the hole in the rear of the equatorial
mount (Figure 4). Hold the R.A. GoTo drive in your hand
so its threaded hole meets the screw as it comes out the
other end of the hole. Thread the screw into the threaded
hole of the R.A. motor assembly until secure, but do not
overtighten. You will need to make small adjustments to
the motor position in the following steps.
4. Slide the geared end of one of the small brass gears onto
the worm gear shaft so it resembles Figure 5. Rotate the
small brass gear so that one of the setscrews will press
against the flat part of the R.A. worm gear shaft. Secure
the small brass gear by tightening the setscrews with the
included 2mm hex key, but do not overtighten. You may
have to make small adjustments to the gear’s position in
the following step to ensure proper gear engagement.
5. Make certain that the teeth of the smaller motor assembly
gear correctly mesh with the teeth of the brass gear (Figure
6). Also, make certain the gears are not too tightly pressed
together. You may have to adjust the way the gears mesh
by tightening or loosening the socket-head cap screw that
is used to attach the R.A. GoTo motor assembly to the
mount and/or the small setscrews on the brass gear. If the
gears are not meshed correctly or are too tightly pressed
together, then the drive will not track properly, or at all.
This attachment process is tricky, and it may take several
adjustments before the gears properly mesh.
6. Take the R.A. GoTo motor cover and hold it near the
installed R.A. GoTo motor. On the inside of the motor
cover, you will see a set of wires with a white 4-pin rectan-
gular connector attached. Carefully connect the 4-pin rect-
angular connector attached to the R.A. GoTo motor cover
to the corresponding 4-pin rectangular connector on the
R.A. GoTo motor. Once connected, the wiring of your R.A.
GoTo motor should resemble Figure 7.
Note: Inside the R.A. GoTo motor cover you will find an addi-
tional set of wires connected to each other with 5-pin rect-
angular connectors. Make certain these wires are connected
before proceeding to step 7.
7. Once the rectangular connector has been attached, you
can install and secure the R.A. GoTo motor cover with the
10mm long Phillips head screw. Don’t forget to re-install
the rear latitude adjustment L-bolt if you have removed it
previously.
Note: There is a small packet of grease included with your
SkyView Pro GoTo system. Once you have installed the GoTo
motor so the gears mesh properly, you can apply a very small
amount of the included grease to the meshed gears to ensure
optimal gear mating.
Figure 4. Attaching the R.A. GoTo motor
Figure 5. Correct orientation of brass gear for R.A. axis
Hole
4mm
hex
key
Brass gear
Setscrew
R.A. worm gear
shaft
Brass gear
Small R.A. GoTo
motor gear
R.A. GoTo
motor
Figure 6. Correctly meshed gears (R.A.)
R.A.
GoTo
motor