iOptron #3500 User Manual
5
CAUTION: The mount may swing freely when the
Gear Switch is released. Always hold on to the
mount before you release the gear switch to prevent
it from swinging. Otherwise it may cause personal
injury or damage to the equipment.
Gear Switch is released. Always hold on to the
mount before you release the gear switch to prevent
it from swinging. Otherwise it may cause personal
injury or damage to the equipment.
Turn the Tension Adjuster counterclockwise until the
Gear Switch Knob can be turned 90 degree to OPEN
position to disengage the worm from the worm wheel.
Figure 7. Gear switch and Tension Adjuster
Rotate the mount head along the R.A. axis to horizontal
position. Adjust the CW position to balance the mount.
position. Adjust the CW position to balance the mount.
Figure 8. Balance a SkyGuider
TM
mount
CAUTION: The balancing must be performed while
the Gear Switch is disengaged (OPEN position).
the Gear Switch is disengaged (OPEN position).
Turn Gear Switch Knob 90 degree again to LOCK
position to re-engage the worm to the worm wheel.
Retighten the Tension Adjuster a few turns clockwise.
position to re-engage the worm to the worm wheel.
Retighten the Tension Adjuster a few turns clockwise.
The rule of thumb is to fully screw in the Tension Adjuster
and then back out by about 2 turns. The optimum spot varies
with actual conditions which can be from half a turn to 2
turns. Ideally, it should be at a position just deep enough to
eliminate any free movement (play) while force on the worm
assembly is kept at a minimum.
and then back out by about 2 turns. The optimum spot varies
with actual conditions which can be from half a turn to 2
turns. Ideally, it should be at a position just deep enough to
eliminate any free movement (play) while force on the worm
assembly is kept at a minimum.
.
Step 6. Polar Alignment
Step 6. Polar Alignment
In order for an equatorial mount to track properly, it has
to be polar aligned to the pole star. For those located in
the northern hemisphere, Polaris is the pole star. For
to be polar aligned to the pole star. For those located in
the northern hemisphere, Polaris is the pole star. For
those in the southern hemisphere, use Sigma Octantis in
Octans as the pole star.
Octans as the pole star.
To locate the pole star from the polar scope, take off the
Polar Axis Cover and Polar Scope Cover. Look through
the polar scope eyepiece to locate Polaris (if you are
located in northern hemisphere). Slightly turn the tripod
Center Rod Knob to loosen the mount head. Adjust the
Azimuth Adjustment Knobs to do a fine adjustment of the
mount to center the pole star in the azimuth direction.
Tighten the Center Rod Knob to secure the mount.
Slightly loosen the two Latitude Locking T-bolts on the
side of the mount, turning the Latitude Adjustment Knob
to adjust the latitude (altitude). Re-tighten the locking
screws.
Polar Axis Cover and Polar Scope Cover. Look through
the polar scope eyepiece to locate Polaris (if you are
located in northern hemisphere). Slightly turn the tripod
Center Rod Knob to loosen the mount head. Adjust the
Azimuth Adjustment Knobs to do a fine adjustment of the
mount to center the pole star in the azimuth direction.
Tighten the Center Rod Knob to secure the mount.
Slightly loosen the two Latitude Locking T-bolts on the
side of the mount, turning the Latitude Adjustment Knob
to adjust the latitude (altitude). Re-tighten the locking
screws.
The SkyGuider
TM
mount is equipped with iOptron’s
AccuAligning
TM
dark field illuminated polar scope. You
can do a fast and accurate polar alignment with
iOptron’s Quick Polar Alignment procedure to
maximize the benefit of the iOptron polar scope.
iOptron’s Quick Polar Alignment procedure to
maximize the benefit of the iOptron polar scope.
Plug a power source to the mount. Connect the polar
scope LED to the mount by threading the polar scope
illuminating LED into the polar scope LED threading hole
(Figure 9). Plug the other end of the LED cable into the
LED socket located on the control board.
scope LED to the mount by threading the polar scope
illuminating LED into the polar scope LED threading hole
(Figure 9). Plug the other end of the LED cable into the
LED socket located on the control board.
Press the power switch on the mount to turn the
SkyGuider
SkyGuider
TM
mount on. Look through the polar scope
eyepiece. Adjust the eyepiece to bring the reticle dial in
focus. As indicated in Figure 10, the Polar Scope Dial
has been divided into 12 hours along the angular
direction with half-hour tics. There are 2 groups, 6
focus. As indicated in Figure 10, the Polar Scope Dial
has been divided into 12 hours along the angular
direction with half-hour tics. There are 2 groups, 6
concentric circles
marked from 36’
to 44’ and 60’ to
70’, respectively.
The 36’ to 44’
concentric circles
are used for polar
alignment in the
marked from 36’
to 44’ and 60’ to
70’, respectively.
The 36’ to 44’
concentric circles
are used for polar
alignment in the
northern
hemisphere using
Polaris. While the
60’ to 70’ circles
are used for polar
alignment in the
Polaris. While the
60’ to 70’ circles
are used for polar
alignment in the
Tension Adjuster
Gear Switch
LOCK
OPEN
Figure 10. Threaded polar scope LED socket
LED thread
Figure 9. Polar scope