Welcome to a new world of adventure. The Orion EQ-3M
Dual-Axis DC Motor Drive System allows convenient hands-
free sidereal tracking of the night sky for telescopes, like the
SkyWatcher 120, that utilize the Orion EQ-3 Equatorial Mount.
The motor drive system is also a necessary component for
doing long-exposure astrophotography. The electronic hand
controller allows positional corrections to be made to both the
right ascension (R.A.) and declination (Dec.) axes of the
mount during an astrophotographic exposure.
1. Parts List
1 R.A. motor assembly
1 Dec. motor assembly (with white nylon gear wheel)
1 Dec. clutch assembly
1 Hand controller
1 Battery pack
1 Socket-head cap screw
1 Washer
1 5mm Allen wrench
1 4mm Allen wrench
1 2mm Allen wrench
2. Installing the R.A. Motor Assembly
1. When facing the front of the mount, the R.A. slow-motion
control cable should be mounted to the right end of the
R.A. worm gear shaft (Figure 1). If it is mounted on the left
end, remove it, and reinstall it on the right end of the
shaft.
2. The R.A. motor is the one with the chrome-colored bracket
and black cylindrical coupling, pictured in Figure 2. Using
the provided 2mm Allen wrench, loosen the socket-head
setscrew on the end of the coupling).
Orion
®
EQ-3M Dual-Axis DC Motor Drive System
#7828
Figure 1
Figure 2
Left end of
R.A. worm
gear shaft
Dec. worm gear
assembly
Right end
of R.A.
worm gear
shaft
Setscrew
on end of
R.A. motor
drive coupling
IN 134 Rev. B 02/09
