Orion 7831 Manual

Orion TrueTrack Single-Axis DC Motor Drive System
®
#7831
T
hank you for your purchase of an Orion TrueTrack motor drive system. The TrueTrack allows convenient
hands-free sidereal tracking of the night sky for SkyView Pro mounted telescopes. The motor drive sys-
tem features a push button hand controller that can move the telescope along the right ascension (R.A.)
axis at speeds 2x and 8x the sidereal rate. This provides an easy way to center objects in the eyepiece.
The TrueTrack single-axis drive is also a useful component for doing short and medium-exposure astro-
photography. The electronic hand controller allows positional corrections to be made in the right ascension
(R.A.) during an astrophotographic exposure.
Figure 1.
The R.A. motor cover.

Parts List

1 R.A. motor assembly
1 Manual clutch assembly (brass gears)
1 Hand controller
1 Battery pack
1 4mm socket-head cap screw
2 Velcro strips (1"hook" strip, 1 "loop" strip)
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Attaching the R.A. Motor
Drive
R.A. motor
cover
Remove the telescope tube, counterweight, and counter-
weight shaft from the mount before attaching the motor drive.
1. Remove the R.A. motor cover from the mount by loosening
the Phillips head screw on the bottom of the cover (Figure
1). Slide the cover off the mount.
2. The R.A. motor assembly (Figure 2) is attached to the
mount by a 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 3). Attach the 4mm screw
to the end of a 4mm hex key and push it up through the
hole in the rear of the equatorial mount. Hold the R.A. drive
Phillips-head
in your hand so that its threaded hole meets up with the
screw
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. This attachment pro-
cess is tricky, and it may take you several 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
Modular
jack
Threaded hole
Figure 2.
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E-mail: support@telescope.com
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89 Hangar Way, Watsonville, CA 95076
The R.A. motor assembly.
Brass gear
IN 196 Rev. B 03/09