STEP 3. Adjust Altitude
This step requires you to know the latitude of your current location. This can be found from your
8407+ hand controller after the embedded GPS receives the signal from the satellites. It can also be
easily found on the Internet, using a GPS satellite-navigation system, or a GPS capable cell phone.
You will have to change this latitude setting every time you significantly change your night sky viewing
location. Note that this setting directly affects the mount’s GOTO accuracy.
Figure 16. Setting the latitude
Figure 17. Latitude Adjustment Knob
Slightly loosen the Altitude Locking Clamps about a quarter (1/4) turn with the Allen wrench, on
both side of the mount. Turn the Altitude Adjustment Knob until the arrow points to your current latitude
on the Latitude Scale, as shown in Figure 16. Tighten the Altitude Locking Clamps when done.
The altitude adjustment employs worm gear system and can be adjusted precisely when turn in
one direction. The fine adjustment is 0.5 arcmin. Use the wrench as a lever for better control of the
knob.
STEP 4. Install the Counterweight (CW) Shaft
The CW shaft system is a two-part configuration. It comes with preinstalled top part of the shaft.
Just simply thread the CW shaft onto it.
Figure 18. Install CW shaft
At very low-latitudes (<10°), you may tilt the CW shaft to accommodate it. There are three
screws on CEM70 CW Mounting Housing: A Shaft Locking Screw, a Shaft Position Screw on the other
side, and a Low-Latitude Set Screw, as shown in Figure 19.
Loosen the Shaft Position Screw first. Then loosen Shaft Locking Screw. Turn the Low Latitude
Position Screw into the CW Mounting Housing to tilt the CW shaft so that the CW does not foul your
tripod/pier (Figure 20). Then tighten the CW Shaft Positioning Screw and Shaft Locking Screw.
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