Orion Telescopes & Binoculars
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ADDENDUM TO INSTRUCTION MANUAL IN 154
IN 600 Addendum 09-17
Orion
®
AstroTrack
™
9V DC Motor Drive for EQ-1B Mount
#21047
For owners of an Orion telescope that includes the EQ-1B equatorial
mount (see list at right) – which is slightly different from the standard
Orion EQ-1 mount -- you will need to replace the mounting bracket
that comes pre-installed on the AstroTrack motor drive (#7812) with
the extra one included in this package. This Addendum provides
instructions for how to replace the bracket and install the motor drive
on the EQ-1B mount. For more information about the AstroTrack
motor drive itself and its operation, refer to the instruction manual IN
154
Identifying the EQ-1B Mount
The extra bracket included separately in this package allows installa-
tion of the AstroTrack motor drive onto the EQ-1B equatorial mount
(
Figure 1
). The pre-installed bracket on the motor drive does not fit
the EQ-1B, so must be replaced. As of this writing, telescopes that
include the EQ-1B mount are:
• Orion SpaceProbe II 76mm Equatorial Reflector
• Orion Observer 80ST 80mm Equatorial Refractor
• Observer II 70mm Equatorial Refractor
The EQ-1B equatorial head looks different in many ways from the
EQ-1 equatorial head.
Figure 2
identifies a couple of the differences.
The EQ-1B mount:
1. Has its latitude scale on the RIGHT side of the mount (when
facing the front of the mount) as shown, not on the left side
like the EQ-1.
2. Has a rounded “acorn” nut in the center of the latitude scale,
whereas the EQ-1 does not use acorn nuts.
Assuming that you have identified your mount as the EQ-1B type
from the above, you can now proceed with the replacement of the
bracket as follows. You will need a small Philips screwdriver and an
adjustable wrench or 9/16" crescent wrench.
One Year Limited Warranty
This Orion product 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. Proof of purchase (such as a copy of the origi-
nal receipt) is required. This warranty is only valid in the country of purchase.
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. It is not intended to remove or restrict your other legal rights under applicable local con-
sumer law; your state or national statutory consumer rights governing the sale of consumer goods remain fully applicable.
For further warranty information, please visit www.OrionTelescopes.com/warranty.
Bracket for EQ-1B
Latitude scale
Acorn nut
Thumbscrews
Housing
Screws
Right ascension
gear shaft
Pre-installed
bracket for
EQ-1
Figure 1.
The AstroTrack bracket for the EQ-1B mount (left) is
different from the pre-installed bracket for the EQ-1 (right).
Figure 2.
The EQ-1B
mount has its latitude
scale on the right side of
the mount (when viewing
from the front of the
mount, as shown here),
and has an “acorn” nut,
unlike the EQ-1 mount.
Figure 3.
Remove the two thumb-
screws to remove the housing from
the motor drive.
Figure 4.
Remove the pre-installed
bracket by unscrewing the two
attachment screws.
Nut
