Orion TRUETRACK SINGLE-AXIS DC MOTOR DRIVE SYSTEM 7831 - Manual (Page 3)

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power switch on the hand controller (Figure 6) to the “ON”
position. The LED in the center of the hand controller should
be shining green. If properly polar aligned and balanced, the
mount will now be tracking the motion of the night sky, and the
telescope should hold any astronomical object steady in its
eyepiece over time.
To move your telescope to a new object, loosen both the R.A.
and Dec. lock levers and move the telescope until it is pointed
in the general direction of the object you wish to view. Retighten
the R.A. and Dec. lock levers. Loosen the thumbwheel on the
manual clutch assembly and use the R.A. and Dec. slow-
motion control knobs to center the object in the eyepiece’s
field of view. Retighten the thumbwheel, and the motor drive
system will keep the object centered over time. Remember,
never use the slow-motion control knobs when the manual
clutch is engaged or you could permanently damage the
motor.
There are four buttons on the hand controller. If no buttons are
pressed, the motor will turn the R.A. axis of the mount at side-
real rate. If the bottom right button is pressed, the drive will
turn at 2x sidereal rate, which will cause objects viewed in the
telescope’s eyepiece to move slowly eastward. If the bottom
left button is pressed, the drive will stop turning, which will
cause objects in the eyepiece to move slowly westward. The
bottom two buttons are most useful for guiding purposes dur-
ing long-exposure astrophotography.
Similarly, the top right button on the hand controller moves
objects in the telescope’s eyepiece quickly eastward at 8x the
sidereal rate, while the top left button moves objects quickly
westward at 8x the sidereal rate. The top two buttons are most
useful for centering an object in R.A. within the field of view of
an eyepiece.
Note that whenever any of the four buttons on the hand con-
troller are pressed, the LED in the center of the controller will
shine red; when the button is released, the LED will be green.
Also, when the LED starts to blink at a constant rate, its time
to change the batteries in the battery pack.
Specifications
Power requirements: 6V DC
Battery type: Four D-cells
Operation: Northern or Southern hemisphere
Guiding rates: Sidereal ±100% sidereal
Centering rates: ±8x sidereal
Manual clutch: External
Figure 6. The hand controller.
One-Year Limited Warranty
This Orion TrueTrack motor drive system is warranted against defects in materials or workmanship for a period of one year from the
date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes
& Binoculars will repair or replace, at Orion’s option, any warranted instrument that proves to be defective, provided it is returned
postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. If the product is not registered, proof of purchase
(such as a copy of the original invoice) is required.
This warranty does not apply if, in Orion’s judgment, the instrument has been abused, mishandled, or modified, nor does it apply to
normal wear and tear. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to
state. For further warranty service information, contact: Customer Service Department, Orion Telescopes & Binoculars, 89 Hangar
Way, Watsonville, CA 95076; (800) 676-1343.
Orion Telescopes & Binoculars
89 Hangar Way, Watsonville, CA 95076
Customer Support Help Line (800) 676-1343 • Day or Evening