3
the center. Now carefully tighten the four camera circuit board
screws but being very careful not to touch the circuit board
with the screwdriver as noted in the warning at Step 7. Once
the image has been centered and the screws tightened pro-
ceed to tighten the 3 allen key screws that hold the brass lens
holder ring in place. This should be done evenly with all screws
to prevent pushing from one side and causing lens to be off
center again.
The examples shown in
Figure 9 has the camera placed on
top of a bright image on a mobile phone screen and also uses
the Deep Space Video Camera II Computer control to place
Cross hairs on top of the image. This program is included on
CD with the AllSKy II computer control software.
For users of the AllSky I you can manually add cross hairs to
aid in centering the lens by selecting and adjusting the MASK
option in the menu. Up to four rectangular masks can be posi-
tioned and sized accordingly to produce a cross hair.
Figure 9. a)
Image off center,
b)
adjusted image
Step 9 – Re-installation of Camera to
Camera Bracket
WARNING: Unplug power and video cable before
proceeding.
Now that the lens is centered the camera can now be placed
back on to the camera bracket using the four small screws
(
Figure 6).
Step 10 – Re-installation of the Fan to
Camera Bracket
Re-Attach the fan back onto the camera bracket using the fan
screws (
Figure 5).
Step 11 – Re-installation of the Fan Power Wires
Re-Attach the fan wires back onto the green block on the
larger circuit board. Pay close attention to the placement of
each colored wire for correct polarity (Black = Negative, Red =
Positive) See
Figure 4 for details.
Step 12 – Re-installation of Camera Bracket
to Base
Use the four screws to re-attach camera bracket back onto
base (
Figure 3).
WARNING: Since the heater becomes hot to the touch
in cold climates, care must be taken to ensure that the
internal wires do not come into contact with the heater
to avoid accidental melting and damage to internal
wires. Wires should be held down with the original cable
fastener (Figure 10) and the lens cable wrapped around
the camera to keep it away from the heater.
Figure 10.
Cable Fastener.
Step 13 – Re-installation of the RS-232
Circuit Board
For AllSky II units check that the thicker camera cable is
wrapped behind the larger circuit board and not free to move
near heater. After checking that all wires have been secured
away from the heater the small circuit board can now be reat-
tached using the two small washers and screws (
Figure 2).
Step 14 – Re-installation of the Dome Bubble
Carefully line up the groove on the inside of the dome cover
with the notch on the base and gently allow the cover to drop
into place. The dome cover should now be seated evenly and
all four screws lined up ready for installation.
Using the allen key, gently tighten each screw until a small bit
of resistance is felt, then move onto the next screw. Repeat for
all screws. Next tighten each screw more firmly and evenly to
help ensure a weatherproof seal.
a)
b)
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