ORION TELESCOPES & BINOCULARS AstroTrack 21047 Installation and operating instructions

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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 t
the EQ-1B, so must be replaced. As of this writing, telescopes that
include the EQ-1B mount are:
• Orion SpaceProbe II 76mm Equatorial Reector
• 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 identies 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 identied 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 benet 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 modied, nor does it apply to normal wear
and tear. This warranty gives you specic 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

1. Make sure the power switch is in the OFF position. Unscrew the
two thumbscrews on the front panel and remove the housing
(Figure 3).
2. Using a small Philips screwdriver, remove the two screws that
hold the pre-installed bracket on the motor drive (Figure 4).
Use your nger and thumb to hold the small nut while you turn
the screw counterclockwise. If that doesn’t work you will have
to use to use a pair of needle-nosed pliers or a small adjust-
able wrench to hold the nut when turning the screw.
3. Remove the bracket.
4. Now install the bracket for the EQ-1B by lining up the two small
holes of the bracket with the holes in the motor drive.
5. Insert one of the screws through the aligned holes from the
bracket side and place the nut on the screw end. Then use
the screwdriver to tighten the screw while holding the nut with
your ngers (or the pliers or wrench) (Figure 5). Repeat with
the other screw. The motor drive with attached bracket should
look like Figure 6.
6. Now reattach the housing using the two thumbscrews you
removed in step 1. (Make sure you have installed the 9V bat-
tery rst; refer to “Installing the Battery” in the AstroTrack’s
instruction manual.)
Now the AstroTrack motor drive is ready to be installed on the mount.
The installation procedure is nearly the same as described in the
AstroTrack’s instruction manual. For the EQ-1B mount, however,
you will remove the acorn nut on the right side of the mount head
(see Figure 2). Then slip the drive coupler over the right ascension
gear shaft, as described in the AsroTrack’s manual, making sure the
thumbscrew on the coupler is aligned with the at “groove” in the gear
shaft (Figure 7a). Place the large hole in the bracket over the thread-
ed post that was exposed by removing the acorn nut (Figure 7b).
Then re-install the acorn nut. You will need an adjustable wrench or
9/16" crescent wrench to loosen and tighten the acorn nut.
Figure 8 shows the AstroTrack installed on the EQ-1B mount.
Figure 5. Install the new bracket for EQ-1B
mount as shown using the two screws and nuts.
Figure 6. The bracket for the EQ-1B mount
fully attached.
Figure 8. The AstroTrack installed on
the EQ-1B equatorial mount.
Figure 7. a)First fasten the drive coupler onto the R.A. gear shaft, aligning
the thumbscrew with the groove on the shaft end. b) Then place the bracket
hole over the threaded post.
b.
a.
Coupler
Thumbscrew
Gear shaft
Groove
Threaded post