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Wide
Narrow
Figure 6. The dual-width saddle can accept either Vixen-style
(narrow) or Losmandy-style (wide) dovetail plates.
balanced in this way then you have either too much or
too little counterweight. Remove the counterweight, or
add an additional counterweight if needed.
4.
Retighten the counterweight lock knob.
Dec. lock
lever
Figure 7.
Before mounting a telescope, orient the saddle so the
grooves run side to side, as shown here.
The telescope is now balanced on the RA axis. To balance the
telescope on the Dec axis,
5.
First, tighten the RA lock lever, with the counterweight
shaft still in the horizontal position.
6.
With one hand on the telescope optical tube, loosen
the Dec lock lever. The telescope should now be able to
rotate freely about the declination axis. Determine which
direction it tends to rotate.
7.
Now, if the telescope is held in tube rings, loosen the
tube ring clamps until you can slide the telescope tube
forward and back inside the rings (this can be aided by
using a slight twisting motion on the optical tube while
you push or pull on it). Slide it until it is balanced.
8.
If your telescope is not held by tube rings, you will need
to slide the dovetail plate it is mounted on forward or
backward in the saddle. To do that carefully loosen the
saddle lock knobs while supporting the telescope with
your other hand, then slide the plate as needed. Then
retighten the lock knobs.
The telescope is now balanced on both axes. When you loos-
en the lock lever on one or both axes and manually point the
telescope, it should move without resistance and should not
Saddle
drift from where you point it.
Saddle
6. Powering the Sirius EQ-G
lock
knobs
The Sirius EQ-G should be powered by a 12V DC power sup-
ply (tip positive) capable of producing continuous current with
a minimum of 3 amps, such as the Orion Dynamo Pro Lithium
155Wh AC/DC/USB Lithium Power Supply. A 12V DC power
R.A. lock
lever
cable is included with the mount; it has a male cigarette lighter
plug on one end and a standard 12V DC power plug on the
other end) to connect the battery to the 12V DC power jack on
the drive panel of the mount.
7. The Sirius EQ-G Drive
Panel
Review Figure 8 to familiarize yourself with the components of
the drive panel.
Drive Panel Components
POWER: The small end of the included 12V DC "cigarette
lighter" power cable provided with the mount plugs into the
power input jack.
HAND CONTROL: An RJ-45 8-pin jack is for connecting the
coil cable of the SynScan hand controller.
AUTO GUIDE: The RJ-12 6-pin jack is for connecting an
autoguider. It is compatible with any autoguider with an ST-4
type interface.
ON/OFF SWITCH: Turns on and off the power to the mount
and hand controller.
5
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