Astro Baby Sky-Watcher HEQ5 Manual passo a passo - Página 2
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Astro Babys HEQ5 Polar Alignment
ALIGNING THE RETICULE
http://www.astro-baby.com/HEQ5/HEQ5-1.htm
perfectly correct as it is only used in the polar alignment process.
Also on the diagram on the left you can only see one of the reticule
adjustment screws - there are three of these around the eyepiece of the
polar scope. The focus ring can be very stiff when new - turn counter-
clockwise to focus the polar scope.
Before starting the alignment procedure you will need an Allen key that
fits the reticule adjusters AND a small jewellers screwdriver to release
the Date/Longitude Mark ring.
OK we are now ready to set up the scope for alignment.
First you need to adjust the reticule to make sure that its lined up with
the mount correctly.
planning only to use the scope for observation use rather than
photography. Skipping this step will introduce some errors into the
alignment but that wont matter very much if you are just observing as
you will be able to correct any error via the hand controller.
Skip aligning the reticule and take me to page 2
Possibly the toughest and scariest job for a newbie on the HEQ5 is getting the
reticule aligned correctly to the mount.
Trust me its not as hard as you might think and if you take your time and don't
rush quite a simple job.
This is an easier job if done indoors with decent lighting and your adjustment
tools by your side. You will need one Allen key to adjust the reticule using the
reticule adjustment screws shown above. There are three of these around the
eyepiece and you will need to slacken one and tighten the others to take up the
slack slowly and bit at a time to get alignment.
SCREWS MORE THAN 1/8 OF A TURN AT TIME
out. These screws are quite coarse and are adjusting the reticule by fractions of a
millimeter - a small amount of turn make the reticule move quite a bit as you will
see.
I would also advise to do this with the mount set for zero elevation and with the
polar scope almost horizontal. That way if you do end up having the reticule fall
out it wont go too far.
The manual assumes you will have the mount pointed at Polaris but its far easier
to do this task with the scope aligned to a distant object. I use a light on top of a
distant radio tower but you can also use a small dot on a white card pinned to a
wall. The further away the target object the better.
Point the polar scope at the target, using the altitude and azimuth screws on the
mount to fine tune. When you look through the polarscope the central area has a
cross-hair. Align this over your target as in Fig 1.
Now rotate the mount through the RA axis by releasing the RA lock and turning
the mount slowly through 180 degrees and then lock the RA axis . Observe the
target against the cross-hairs. Chances are it drifts off as in Fig 2. This indicates
the polarscope is out of alignment with the mount and will need correcting.
To correct this drift of the target from the cross-hairs use an Allen key to slightly
loosen the reticule adjustment screw most nearly opposite the cross-hair in the
direction by which the the target is 'off' i.e. in Fig 2 you would slightly release the
screw nearest the 2 'o' clock position. Now tighten the screw that's nearest to the
object you are targeting on. You will find the screws are quite tight and will tend to
'click' a little as they are loosened. I use these clicks as a guide in any event -
remember never to release any of the screws more than 1/8th of a turn.
You need to adjust for HALF the distance that the target has drifted. As an
example in Figure 3 adjust the target to be halfway along the red line.
You can skip this step if you wish and are
DO NOT TURN ANY OF THESE
or else the reticule may fall
15/08/12 09.51
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