
need further elaboration. The main point is that you will want to avoid complete removal of the cables that involves taking o
D
ECLINATION HUB PLATE if that is possible for your situation.
The real question is: how can subsequent setups be done easily, and how can a person polar align with all those cables in
there? Fortunately there are two easy solutions. First, if you regularly need to use your polar scope and you are only running a
couple of cables through the mount, just make sure that your cables were run out the RA’s C
ABLE ACCESS HOLE. If you use this
feature, you can insert and use the polar scope without any problem. (You may need to tug lightly at a cable to get it out of the
line of sight when aligning.) The cables can simply be left in place and wrapped around the mount fo
ff the
r most transport and storage
f the
n a
as you can get, pull off the polar scope and adapter, and
ready to tie them off, plug them in and go!
s.
ol
A
CCESS COVER of the RA axis.) Only the declination portion will be left inside the mount. Connect all
verse the procedure; simply pull the declination leg on out through the RA’s
A F w
• nt where it emerges from the CABLE CHANNEL in
e at that point with a small piece of colored electrical tape works well.
• s.
)
Please feel free to contribute hints and tricks of your own for future editions of this manual. At Astro-Physics, we know that our
situations. You simply need to take care not to pinch the cables anywhere or to strike a connector on the exterior surfaces o
mount, which could cause a scratch. Then, just set up the mount with the cables already in place.
But what about polar alignment if the cables have been run out the bottom of the RA axis or if there are very many cables?
Simple! Set your mount up on its tripod or pier, but don’t tie off or hook up any of the cables from the bottom of the RA axis yet.
Now, open the S
IGHT HOLE / CABLE ACCESS COVER on the declination axis. Push the cables up from the bottom of the RA axis
with one hand and hook them with a finger through the sight hole. Now pull the bottom part of the cabling out through the hole
and hang the cables out of the way. Insert your P
OLAR SCOPE ADAPTER to rough polar align (don’t over-tighten), and then put i
polar scope to get a good polar alignment. When you are as close
reinsert your cables through the S
IGHT HOLE / CABLE ACCESS COVER. You are now
A Note on the M
The “Y” cable that
connects your GTOCP3
control box to the servo
motor gearboxes can be
run either inside or
outside the mount. The
Mach1GTO doesn’t
really have anything that
will catch the cables, but
you still may want to run
them inside. This is one
cable that will not be run
out through the
D
ECLINATION AXIS HUB.
To insert the “Y” cable,
put the control box end
into the S
IGHT HOLE /
CABLE ACCESS COVER
on the declination axi
Run it out through the
RA’s C
ABLE ACCESS
COVER, and pull the
shorter RA leg of the cable all the way through. (Again, if the P
OLAR SCOPE ADAPTER is removed, you can easily guide the contr
box plug out the C
ABLE
ount’s Servo “Y” Cable
three plugs. When you remove this cable, don’t re
C
ABLE ACCESS COVER.
e More Hints and Tricks
If you need to remove a cable completely from the mount, mark the poi
the D
ECLINATION ACCESS HUB. Wrapping the cabl
That way you won’t need to re-measure to position the cable properly.
It is often helpful to bundle some of your cable
• Always tie off cables for CCD cameras to the focuser so that the weight of the cables doesn’t cause movement (flexure
in the imaging system over a long exposure.
22
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