Celestron CGX 700 Maksutov Cassegrain Telescope CGX Mount - Page 12

Precise Polar Alignment, Motion Range in Mount

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Precise Polar Alignment Celestron's All-Star Polar Alignment allows you to precisely polar align your mount without using Polaris or a polar axis finder. This software-assisted polar alignment allows you to choose a convenient star. Prerequisite: The CGX must be aligned with a Two Star, One Star, or Solar System Align. 1. Select a suitable bright star from the NexStar hand control's database. Slew the telescope to the star. 2. P ress the Align button. Select "Polar Align" then "Align Mount" from the list. 3. T he telescope will then re-slew to the alignment star and ask you to center it in the eyepiece in order to "sync" on the star. 4. P ress Align and the telescope will slew to the position that the star should be if it were accurately polar-aligned. 5. U se the mount's altitude and azimuth adjustments to center the star in the eyepiece. Do not use the direction keys on the hand control to center the star. 6. Press Enter. Polar alignment is complete. Motion Range in Mount Sofware Range The CGX employs software controlled limit sensors which detect when the mount has reached near its mechanical range limit. Once the mount reaches the switch, the motor will decelerate to a stop and a "Limit Switch" warning message will appear. The mount will no longer slew in the direction of the limit switch until you reverse directions. Mechanical Range The CGX uses internal cabling so the mount is designed not to move more than a certain range. Both axis are limited by a hard stop built into the mount. This limited range can also help prevent unintentional interference between your telescope and the mount or tripod. If for any reason the mount exceeds the software limit switch (or if the clutch is unlocked and the mount is manually moved), the mount will halt at the hard stop. R.A. limit (Figure 9.1) allows you to track 20º past the meridian. If you leave the mount unattended while it's tracking, it will automatically stop before reaching the mechanical hard stop. DEC limit (Figure 9.2) contains enough slew range to reach any portion of the sky. 12 | ENGLISH Figure 9.1 One side of R.A. mechanical limit Figure 9.2 One side of DEC mechanical limit

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12
| ENGLISH
Precise Polar Alignment
Celestron’s All-Star Polar Alignment allows you to precisely
polar align your mount without using Polaris or a polar axis
finder° This software-assisted polar alignment allows you to
choose a convenient star°
Prerequisite:
The CGX must be aligned with a Two Star,
One Star, or Solar System Align.
1°
Select a suitable bright star from the NexStar hand
control’s database° Slew the telescope to the star°
2°
Press the Align button° Select “Polar Align” then “Align
Mount” from the list°
3°
The telescope will then re-slew to the alignment star and
ask you to center it in the eyepiece in order to “sync” on
the star°
4°
Press Align and the telescope will slew to the position
that the star should be if it were accurately polar-aligned°
5°
Use the mount’s altitude and azimuth adjustments to
center the star in the eyepiece° Do not use the direction
keys on the hand control to center the star°
6°
Press Enter° Polar alignment is complete°
Motion Range in Mount
Sofware Range
The CGX employs software controlled limit sensors which
detect when the mount has reached near its mechanical
range limit° Once the mount reaches the switch, the motor
will decelerate to a stop and a “Limit Switch” warning
message will appear° The mount will no longer slew in the
direction of the limit switch until you reverse directions°
Mechanical Range
The CGX uses internal cabling so the mount is designed
not to move more than a certain range° Both axis are limited
by a hard stop built into the mount° This limited range can
also help prevent unintentional interference between your
telescope and the mount or tripod° If for any reason the
mount exceeds the software limit switch (or if the clutch is
unlocked and the mount is manually moved), the mount will
halt at the hard stop°
R°A° limit (Figure 9°1) allows you to track 20º past the
meridian° If you leave the mount unattended while it’s
tracking, it will automatically stop before reaching the
mechanical hard stop°
DEC limit (Figure 9°2) contains enough slew range to reach
any portion of the sky°
Figure 9.1 One side of R.A. mechanical limit
Figure 9.2 One side of DEC mechanical limit